Company lists · Data refreshed October 2026
Top 24 Portable emissions measurement systems (pems) testing services based in the United States
RevenueBase identified 52 company matches for portable emissions measurement systems (pems) testing services associated with the United States as of October 2026 and tracks 522 professional contacts across them, including 235 with verified work emails. Austin is the largest hub.
This list covers company matches for portable emissions measurement systems (pems) testing services associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 29, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 24 largest portable emissions measurement systems (pems) testing services based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 100 contacts → | ||||
Exact match “Based in Austin, Texas, ESC Spectrum, an Alliance Technical Group company, is a leading provider of products and services for customers in a variety of industries, from Electric…” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 2 | 39 contacts → | ||||
Exact match “Erthwrks provides air testing services for industry.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 3 | 38 contacts → | ||||
Exact match “Excel Engineering is a highly qualified and certified provider of testing services.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 4 | 32 contacts → | ||||
Exact match “Formed in 2010 and headquartered in Houston, Texas, Encino Environmental Services, LLC is an emissions testing, monitoring, and compliance support firm serving critical…” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 5 | 32 contacts → | ||||
Exact match “30+ YEARS OF PROVEN RESULTS AMP-Cherokee offers environmental compliance and process performance solutions for air quality and emissions monitoring with our turnkey CEMS, FTIR…” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 6 | 29 contacts → | ||||
Exact match “Apex Instruments was established in 1988 as an American-owned company with a worldwide impact.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 7 | 22 contacts → | ||||
Exact match “BAIR IS NOW OFFERING LDAR SERVICES!” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 8 | 22 contacts → | ||||
Exact match “Grace Consulting Inc.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 9 | 18 contacts → | ||||
Exact match “Trace Environmental provides a fully EPA compliant suite of products and services for the continuous emissions monitoring market.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 10 | 17 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 11 | 15 contacts → | ||||
Exact match “Established in 1983, ARI Environmental, Inc.(ARI) is a leading environmental air emissions testing company.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 12 | 13 contacts → | ||||
Exact match “We are emissions compliance professionals who specialize in communications-driven emissions testing to help our partners in the oil & gas industries achieve their compliance goals.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 13 | 12 contacts → | ||||
Exact match “3DATX Corporation is a Buffalo, NY based company that manufactures next generation emissions measurement technologies for the transportation and power generation markets.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 14 | 11 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 15 | 8 contacts → | ||||
Exact match “ESW America is a leading independent emissions testing company based in Montgomeryville, PA.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 16 | 5 contacts → | ||||
Exact match “AirSource Technologies is an emissions testing company based in Kansas City, Kansas.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 17 | 4 contacts → | ||||
Exact match “4Sight provides safe, professional, turnkey emissions testing services.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 18 | 4 contacts → | ||||
Exact match “Custom Stack Analysis, LLC, was originally established in Alliance, Ohio, in 1965 by Mr.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 19 | 3 contacts → | ||||
Exact match “Custom CEMS Engineering and Integration •Complete, turnkey CEMS solutions •CEMS Custom Rentals •CEMS Maintenance and Support •CEMS Optimization and Data Assessments •CEMS Data…” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 20 | 3 contacts → | ||||
Exact match “At Highmark Analytics, we sell and service industry tools for gas analysis.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 21 | 2 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 22 | 2 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 23 | 1 contacts → | ||||
Exact match “ESC manufactures source testing equipment that fulfills or surpasses the technical and operational requirements specified by the U.S.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
| 24 | 1 contacts → | ||||
Exact match “Welcome to SimpleHg, a leading provider of advanced equipment and services for Hg CEMS monitoring.” Recorded in the RevenueBase company graph · Oct 29, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “portable emissions measurement systems (pems) testing services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 24 of 52 portable emissions measurement systems (pems) testing services based in the United States
See the full list, filter by size, metro and specialty, and access 235 tracked professional contacts with verified work emails. Direct dials are available where recorded.
Free signup · no credit card
Portable emissions measurement systems (pems) testing services based in the United States at a glance
As of Oct 29, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 52 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United States whose business descriptions match “portable emissions measurement systems (pems) testing services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 235 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on October 29, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “portable emissions measurement systems (pems) testing services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many portable emissions measurement systems (pems) testing services are there based in the United States?
RevenueBase identified 52 company matches for portable emissions measurement systems (pems) testing services associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
ESC Spectrum Corporation tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most portable emissions measurement systems (pems) testing services?
Austin leads with 2 company records, followed by Buffalo (2) and Durham (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 235 professional contacts with verified work emails tracked across these 52 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 29, 2026.
Ready to reach these companies? Verified emails and direct dials for all 52 portable emissions measurement systems (pems) testing services based in the United States. Start with a free account, no credit card.
Download this list →Related lists
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
- Real estate companies based in the United States
Company intelligence · public preview
Top 24 portable emissions measurement systems (pems) testing services based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 52 matching company records for portable emissions measurement systems (pems) testing services based in the United States, with 522 tracked contacts and 235 verified work emails.
This public preview shows 24 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 29, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 24 portable emissions measurement systems (pems) testing services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  ESC Spectrum Corporationescspectrum.comHQ: Austin, TX, United StatesReported employees: 51-200 | Austin, TX, United States | 51-200 | Exact match | 100 contacts → |
“Based in Austin, Texas, ESC Spectrum, an Alliance Technical Group company, is a leading provider of products and services for customers in a variety of industries, from Electric…” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Erthwrks, LLCerthwrks.com HQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 39 contacts → |
“Erthwrks provides air testing services for industry.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Excel Engineeringexcelengineering.org HQ: Diagonal, IA, United StatesReported employees: 51-200 | Diagonal, IA, United States | 51-200 | Exact match | 38 contacts → |
“Excel Engineering is a highly qualified and certified provider of testing services.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Encino Environmental Services, LLCencinoenviron.comHQ: Katy, TX, United StatesReported employees: 51-200 | Katy, TX, United States | 51-200 | Exact match | 32 contacts → |
“Formed in 2010 and headquartered in Houston, Texas, Encino Environmental Services, LLC is an emissions testing, monitoring, and compliance support firm serving critical…” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Amp-Cherokee Environmental Solutionsampcherokee.comHQ: Angier, NC, United StatesReported employees: 11-50 | Angier, NC, United States | 11-50 | Exact match | 32 contacts → |
“30+ YEARS OF PROVEN RESULTS AMP-Cherokee offers environmental compliance and process performance solutions for air quality and emissions monitoring with our turnkey CEMS, FTIR…” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Apex Instrumentsapexinst.comHQ: Fuquay-varina, NC, United StatesReported employees: 11-50 | Fuquay-varina, NC, United States | 11-50 | Exact match | 29 contacts → |
“Apex Instruments was established in 1988 as an American-owned company with a worldwide impact.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  BAIRthebair.comHQ: Carrollton, TX, United StatesReported employees: 11-50 | Carrollton, TX, United States | 11-50 | Exact match | 22 contacts → |
“BAIR IS NOW OFFERING LDAR SERVICES!” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Grace Consulting, INCgcitest.com HQ: Wellington, OH, United StatesReported employees: 51-200 | Wellington, OH, United States | 51-200 | Exact match | 22 contacts → |
“Grace Consulting Inc.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Trace Environmental Systems, INCtraceenv.comHQ: Sparta, NJ, United StatesReported employees: 11-50 | Sparta, NJ, United States | 11-50 | Exact match | 18 contacts → |
“Trace Environmental provides a fully EPA compliant suite of products and services for the continuous emissions monitoring market.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Blue SKY Environmental, INCblueskyenvironmental.comHQ: Hayward, CA, United StatesReported employees: 11-50 | Hayward, CA, United States | 11-50 | Exact match | 17 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 |  ARI Environmental, INCarienv.comHQ: Wauconda, IL, United StatesReported employees: 51-200 | Wauconda, IL, United States | 51-200 | Exact match | 15 contacts → |
“Established in 1983, ARI Environmental, Inc.(ARI) is a leading environmental air emissions testing company.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Slipstreamslipstreamtesting.com HQ: Sheridan, WY, United StatesReported employees: 11-50 | Sheridan, WY, United States | 11-50 | Exact match | 13 contacts → |
“We are emissions compliance professionals who specialize in communications-driven emissions testing to help our partners in the oil & gas industries achieve their compliance goals.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  3datx Corporation3datx.comHQ: Buffalo, NY, United StatesReported employees: 11-50 | Buffalo, NY, United States | 11-50 | Exact match | 12 contacts → |
“3DATX Corporation is a Buffalo, NY based company that manufactures next generation emissions measurement technologies for the transportation and power generation markets.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Catalyst AIR Management, INCcatalystair.com HQ: Knoxville, TN, United StatesReported employees: 11-50 | Knoxville, TN, United States | 11-50 | Exact match | 11 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 15 | ESW Americaeswamerica.com HQ: Montgomeryville, PA, United StatesReported employees: 11-50 | Montgomeryville, PA, United States | 11-50 | Exact match | 8 contacts → |
“ESW America is a leading independent emissions testing company based in Montgomeryville, PA.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Airsource Technologies, INCairsourcetech.comHQ: Shawnee, KS, United StatesReported employees: 1-10 | Shawnee, KS, United States | 1-10 | Exact match | 5 contacts → |
“AirSource Technologies is an emissions testing company based in Kansas City, Kansas.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | 4sight Environmental INCstacktesting.us HQ: Abilene, TX, United StatesReported employees: 1-10 | Abilene, TX, United States | 1-10 | Exact match | 4 contacts → |
“4Sight provides safe, professional, turnkey emissions testing services.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Custom Stack Analysis, LLCcustomstackanalysis.com HQ: Alliance, OH, United StatesReported employees: 11-50 | Alliance, OH, United States | 11-50 | Exact match | 4 contacts → |
“Custom Stack Analysis, LLC, was originally established in Alliance, Ohio, in 1965 by Mr.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Cems Expertscems-experts.com HQ: Moorpark, CA, United StatesReported employees: 1-10 | Moorpark, CA, United States | 1-10 | Exact match | 3 contacts → |
“Custom CEMS Engineering and Integration •Complete, turnkey CEMS solutions •CEMS Custom Rentals •CEMS Maintenance and Support •CEMS Optimization and Data Assessments •CEMS Data…” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Highmark Analyticshighmarkanalytics.com HQ: Hardwick, NJ, United StatesReported employees: 1-10 | Hardwick, NJ, United States | 1-10 | Exact match | 3 contacts → |
“At Highmark Analytics, we sell and service industry tools for gas analysis.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Industrial AIR Scienceindustrialairscience.com HQ: Miamisburg, OH, United StatesReported employees: 1-10 | Miamisburg, OH, United States | 1-10 | Exact match | 2 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 22 | Compliance And Research Servicescomplianceandresearch.com HQ: Plainfield, NJ, United StatesReported employees: 1-10 | Plainfield, NJ, United States | 1-10 | Exact match | 2 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 | Environmental Supply Companyenvironsupply.com HQ: Durham, NC, United StatesReported employees: 11-50 | Durham, NC, United States | 11-50 | Exact match | 1 contacts → |
“ESC manufactures source testing equipment that fulfills or surpasses the technical and operational requirements specified by the U.S.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Simplehgsimplehg.com HQ: Highlands Ranch, CO, United StatesReported employees: 1-10 | Highlands Ranch, CO, United States | 1-10 | Exact match | 1 contacts → |
“Welcome to SimpleHg, a leading provider of advanced equipment and services for Hg CEMS monitoring.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 24 of 52 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Portable emissions measurement systems (pems) testing services: dataset insights
October 29, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
52 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 52 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 29, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for portable emissions measurement systems (pems) testing services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many portable emissions measurement systems (pems) testing services did RevenueBase find based in the United States?
The saved snapshot records 52 matching company records, 522 tracked contacts and 235 verified emails. The public preview displays 24 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 29, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cite this list
RevenueBase Data Team. Top 24 portable emissions measurement systems (pems) testing services based in the United States. Snapshot: October 29, 2026. https://revenuebase.ai/companies/portable-emissions-measurement-systems-pems-testing-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
- Real estate companies based in the United States
Company intelligence · public preview
Top 24 portable emissions measurement systems (pems) testing services based in the United States
RevenueBase records 52 matching company records for portable emissions measurement systems (pems) testing services based in the United States, with 522 tracked contacts and 235 verified work emails.
This public preview shows 24 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 29, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 24 portable emissions measurement systems (pems) testing services based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | ESC Spectrum Corporationescspectrum.com HQ: Austin, TX, United StatesReported employees: 51-200 | Austin, TX, United States | 51-200 | Exact match | 100 contacts → |
“Based in Austin, Texas, ESC Spectrum, an Alliance Technical Group company, is a leading provider of products and services for customers in a variety of industries, from Electric…” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Erthwrks, LLCerthwrks.com HQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 39 contacts → |
“Erthwrks provides air testing services for industry.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Excel Engineeringexcelengineering.org HQ: Diagonal, IA, United StatesReported employees: 51-200 | Diagonal, IA, United States | 51-200 | Exact match | 38 contacts → |
“Excel Engineering is a highly qualified and certified provider of testing services.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Encino Environmental Services, LLCencinoenviron.com HQ: Katy, TX, United StatesReported employees: 51-200 | Katy, TX, United States | 51-200 | Exact match | 32 contacts → |
“Formed in 2010 and headquartered in Houston, Texas, Encino Environmental Services, LLC is an emissions testing, monitoring, and compliance support firm serving critical…” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Amp-Cherokee Environmental Solutionsampcherokee.com HQ: Angier, NC, United StatesReported employees: 11-50 | Angier, NC, United States | 11-50 | Exact match | 32 contacts → |
“30+ YEARS OF PROVEN RESULTS AMP-Cherokee offers environmental compliance and process performance solutions for air quality and emissions monitoring with our turnkey CEMS, FTIR…” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Apex Instrumentsapexinst.com HQ: Fuquay-varina, NC, United StatesReported employees: 11-50 | Fuquay-varina, NC, United States | 11-50 | Exact match | 29 contacts → |
“Apex Instruments was established in 1988 as an American-owned company with a worldwide impact.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | BAIRthebair.com HQ: Carrollton, TX, United StatesReported employees: 11-50 | Carrollton, TX, United States | 11-50 | Exact match | 22 contacts → |
“BAIR IS NOW OFFERING LDAR SERVICES!” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Grace Consulting, INCgcitest.com HQ: Wellington, OH, United StatesReported employees: 51-200 | Wellington, OH, United States | 51-200 | Exact match | 22 contacts → |
“Grace Consulting Inc.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Trace Environmental Systems, INCtraceenv.com HQ: Sparta, NJ, United StatesReported employees: 11-50 | Sparta, NJ, United States | 11-50 | Exact match | 18 contacts → |
“Trace Environmental provides a fully EPA compliant suite of products and services for the continuous emissions monitoring market.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Blue SKY Environmental, INCblueskyenvironmental.com HQ: Hayward, CA, United StatesReported employees: 11-50 | Hayward, CA, United States | 11-50 | Exact match | 17 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 11 | ARI Environmental, INCarienv.com HQ: Wauconda, IL, United StatesReported employees: 51-200 | Wauconda, IL, United States | 51-200 | Exact match | 15 contacts → |
“Established in 1983, ARI Environmental, Inc.(ARI) is a leading environmental air emissions testing company.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Slipstreamslipstreamtesting.com HQ: Sheridan, WY, United StatesReported employees: 11-50 | Sheridan, WY, United States | 11-50 | Exact match | 13 contacts → |
“We are emissions compliance professionals who specialize in communications-driven emissions testing to help our partners in the oil & gas industries achieve their compliance goals.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | 3datx Corporation3datx.com HQ: Buffalo, NY, United StatesReported employees: 11-50 | Buffalo, NY, United States | 11-50 | Exact match | 12 contacts → |
“3DATX Corporation is a Buffalo, NY based company that manufactures next generation emissions measurement technologies for the transportation and power generation markets.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Catalyst AIR Management, INCcatalystair.com HQ: Knoxville, TN, United StatesReported employees: 11-50 | Knoxville, TN, United States | 11-50 | Exact match | 11 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 15 | ESW Americaeswamerica.com HQ: Montgomeryville, PA, United StatesReported employees: 11-50 | Montgomeryville, PA, United States | 11-50 | Exact match | 8 contacts → |
“ESW America is a leading independent emissions testing company based in Montgomeryville, PA.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Airsource Technologies, INCairsourcetech.com HQ: Shawnee, KS, United StatesReported employees: 1-10 | Shawnee, KS, United States | 1-10 | Exact match | 5 contacts → |
“AirSource Technologies is an emissions testing company based in Kansas City, Kansas.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | 4sight Environmental INCstacktesting.us HQ: Abilene, TX, United StatesReported employees: 1-10 | Abilene, TX, United States | 1-10 | Exact match | 4 contacts → |
“4Sight provides safe, professional, turnkey emissions testing services.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Custom Stack Analysis, LLCcustomstackanalysis.com HQ: Alliance, OH, United StatesReported employees: 11-50 | Alliance, OH, United States | 11-50 | Exact match | 4 contacts → |
“Custom Stack Analysis, LLC, was originally established in Alliance, Ohio, in 1965 by Mr.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Cems Expertscems-experts.com HQ: Moorpark, CA, United StatesReported employees: 1-10 | Moorpark, CA, United States | 1-10 | Exact match | 3 contacts → |
“Custom CEMS Engineering and Integration •Complete, turnkey CEMS solutions •CEMS Custom Rentals •CEMS Maintenance and Support •CEMS Optimization and Data Assessments •CEMS Data…” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Highmark Analyticshighmarkanalytics.com HQ: Hardwick, NJ, United StatesReported employees: 1-10 | Hardwick, NJ, United States | 1-10 | Exact match | 3 contacts → |
“At Highmark Analytics, we sell and service industry tools for gas analysis.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Industrial AIR Scienceindustrialairscience.com HQ: Miamisburg, OH, United StatesReported employees: 1-10 | Miamisburg, OH, United States | 1-10 | Exact match | 2 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 22 | Compliance And Research Servicescomplianceandresearch.com HQ: Plainfield, NJ, United StatesReported employees: 1-10 | Plainfield, NJ, United States | 1-10 | Exact match | 2 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 | Environmental Supply Companyenvironsupply.com HQ: Durham, NC, United StatesReported employees: 11-50 | Durham, NC, United States | 11-50 | Exact match | 1 contacts → |
“ESC manufactures source testing equipment that fulfills or surpasses the technical and operational requirements specified by the U.S.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Simplehgsimplehg.com HQ: Highlands Ranch, CO, United StatesReported employees: 1-10 | Highlands Ranch, CO, United States | 1-10 | Exact match | 1 contacts → |
“Welcome to SimpleHg, a leading provider of advanced equipment and services for Hg CEMS monitoring.” Recorded description excerpt · October 29, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 24 of 52 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Portable emissions measurement systems (pems) testing services: dataset insights
October 29, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
52 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 52 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 29, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for portable emissions measurement systems (pems) testing services?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many portable emissions measurement systems (pems) testing services did RevenueBase find based in the United States?
The saved snapshot records 52 matching company records, 522 tracked contacts and 235 verified emails. The public preview displays 24 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 29, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cite this list
RevenueBase Data Team. Top 24 portable emissions measurement systems (pems) testing services based in the United States. Snapshot: October 29, 2026. https://revenuebase.ai/companies/portable-emissions-measurement-systems-pems-testing-services/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
- Real estate companies based in the United States