Company lists · Data refreshed September 2026

Top 25 Spectrometer calibration companies based in the United States

Name: Spectrometer calibration companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 264 companies tracked

RevenueBase identified 264 spectrometer calibration companies headquartered in the United States as of September 2026 and tracks 4,336 professional contacts across them, including 1,743 with verified work emails. Houston is the largest hub.

This list covers spectrometer calibration companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 22, 2026 86% judged on-target in blind review

264Companies

4,336Contacts tracked

1,743Verified emails

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The 25 largest spectrometer calibration companies based in the United States

Ranked by team size

Top 25 of 264 spectrometer calibration companies based in the United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to spectrometer calibration companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Transcat	Partial evidence	Rochester, NY, United StatesHQ checked Sep 22, 2026	501-1,000	673 contacts →
	Partial evidence “At Transcat, we are the global leader in test and measurement equipment and calibration services for highly technical industries, including life sciences, power generation…” Source: RevenueBase Database · checked Sep 22, 2026
2	Micro Precision Calibration	Partial evidence	Grass Valley, CA, United StatesHQ checked Sep 22, 2026	201-500	480 contacts →
	Partial evidence “Micro Precision Calibration is a global leader offering customers around the world an easy path to instrument calibration services, standards compliance testing, equipment repair…” Source: RevenueBase Database · checked Sep 22, 2026
3	Simco Electronics	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 22, 2026	201-500	391 contacts →
	Partial evidence “SIMCO Electronics is a leading provider of calibration, repair, and software services for manufacturing, life science, and technology organizations.” Source: RevenueBase Database · checked Sep 22, 2026
4	FOX Valley Metrology	Indirect evidence	Oshkosh, WI, United StatesHQ checked Sep 22, 2026	51-200	127 contacts →
	Indirect evidence “Fox Valley Metrology is a partner to the Quality Assurance Departments of thousands of organizations worldwide.” Source: RevenueBase Database · checked Sep 22, 2026
5	Rothe Development INC	Partial evidence	Webster, TX, United StatesHQ checked Sep 22, 2026	201-500	127 contacts →
	Partial evidence “Since 1967, Rothe has delivered precision-driven solutions in calibration & metrology, engineering, and IT services to a wide range of commercial and industrial sectors.” Source: RevenueBase Database · checked Sep 22, 2026
6	Technical Maintenance, INC	Indirect evidence	Temple Terrace, GA, United StatesHQ checked Sep 22, 2026	51-200	111 contacts →
	Indirect evidence “Who is TMI?” Source: RevenueBase Database · checked Sep 22, 2026
7	Standard Calibrations, INC	Indirect evidence	Chesapeake, VA, United StatesHQ checked Sep 22, 2026	51-200	95 contacts →
	Indirect evidence “Every Measurement Matters.” Source: RevenueBase Database · checked Sep 22, 2026
8	Radian Research, INC	Indirect evidence	Lafayette, IN, United StatesHQ checked Sep 22, 2026	201-500	93 contacts →
	Indirect evidence “Radian Research Company Overview Radian Research is a recognized world leader in Energy Reference Standards, Energy Meter Testing Systems, Current Transformer Testers, Meter Test…” Source: RevenueBase Database · checked Sep 22, 2026
9	Essco Calibration Laboratory	Partial evidence	Chelmsford, MA, United StatesHQ checked Sep 22, 2026	51-200	80 contacts →
	Partial evidence “Essco Calibration Laboratory provides calibration services for a wide variety of commercial test equipment.Capabilities include electronic, mechanical, fiber-optic…” Source: RevenueBase Database · checked Sep 22, 2026
10	Techmaster Electronics	Partial evidence	Vista, CA, United StatesHQ checked Sep 22, 2026	11-50	67 contacts →
	Partial evidence “Techmaster was established in 1989 with the mission to provide calibrations performed through sound, ethical workmanship and to accommodate customer satisfaction.” Source: RevenueBase Database · checked Sep 22, 2026
11	GR Metrology	Indirect evidence	Grand Rapids, MI, United StatesHQ checked Sep 22, 2026	51-200	60 contacts →
	Indirect evidence “Established in 1922, our core business has focused on providing our customers with prompt, professional, and precise Industrial Measurement Solutions.” Source: RevenueBase Database · checked Sep 22, 2026
12	Aldinger Company	Partial evidence	Dallas, TX, United StatesHQ checked Sep 22, 2026	51-200	48 contacts →
	Partial evidence “The Aldinger Company is a full-service measurement and test equipment calibration, sales, and service provider with over 50 years of experience servicing Texas.” Source: RevenueBase Database · checked Sep 22, 2026
13	Accredited Labs	Partial evidence	Irving, TX, United StatesHQ checked Sep 22, 2026	501-1,000	46 contacts →
	Partial evidence “Your Premier Partner in Calibration Accredited Labs is a network of top-tier calibration companies united by one mission: to keep our customers audit-ready and in control of their…” Source: RevenueBase Database · checked Sep 22, 2026
14	Nicol Scales & Measurement	Partial evidence	Dallas, TX, United StatesHQ checked Sep 22, 2026	51-200	40 contacts →
	Partial evidence “Nicol Scales & Measurement is an ISO 17025 Accredited Calibration Company that has provided calibration, repair, and sales of all types of weighing and measurement products since…” Source: RevenueBase Database · checked Sep 22, 2026
15	Gamma Scientific	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 22, 2026	51-200	37 contacts →
	Indirect evidence “With over 60 years of experience in developing commercial light measurement instruments, Gamma Scientific is trusted by the world’s leading organizations to provide accurate and…” Source: RevenueBase Database · checked Sep 22, 2026
16	Cal-Cert	Partial evidence	Milwaukie, OR, United StatesHQ checked Sep 22, 2026	11-50	35 contacts →
	Partial evidence “Cal-Cert has provided high quality, professional calibration services to the materials testing industry for over 40 years and is currently accredited to ISO/IEC17025 through IAS…” Source: RevenueBase Database · checked Sep 22, 2026
17	Conrad Kacsik Instrument Systems	Partial evidence	Solon, OH, United StatesHQ checked Sep 22, 2026	11-50	34 contacts →
	Partial evidence “Conrad Kacsik Instrument Systems located in Solon Ohio, distributes, services, system engineers and provides certified calibration for process control instrumentation and process…” Source: RevenueBase Database · checked Sep 22, 2026
18	ETI Precision	Partial evidence	Frederick, MD, United StatesHQ checked Sep 22, 2026	51-200	32 contacts →
	Partial evidence “Electrical Test Instruments (ETI) is a leader in the calibration, repair, and sale of test and measurement equipment.” Source: RevenueBase Database · checked Sep 22, 2026
19	Martin Calibration INC	Partial evidence	Burnsville, MN, United StatesHQ checked Sep 22, 2026	51-200	31 contacts →
	Partial evidence “For over 30 years, Martin Calibration has provided superior calibration service to the aerospace, automotive, medical, nuclear and manufacturing sectors.” Source: RevenueBase Database · checked Sep 22, 2026
20	Precision Metrology, INC	Partial evidence	Milwaukee, WI, United StatesHQ checked Sep 22, 2026	501-1,000	31 contacts →
	Partial evidence “Trescal provides calibration solutions globally” Source: RevenueBase Database · checked Sep 22, 2026
21	Davis Calibration	Partial evidence	Baltimore, NJ, United StatesHQ checked Sep 22, 2026	201-500	31 contacts →
	Partial evidence “Davis Calibration is the leader in providing calibration, quality assurance, and asset management services.” Source: RevenueBase Database · checked Sep 22, 2026
22	Garber Metrology	Indirect evidence	Lititz, PA, United StatesHQ checked Sep 22, 2026	11-50	30 contacts →
	Indirect evidence “Garber Metrology is a family owned business and has earned the Pennsylvania “Best Place to Work” title.” Source: RevenueBase Database · checked Sep 22, 2026
23	Assurance Technologies	Indirect evidence	Elgin, IL, United StatesHQ checked Sep 22, 2026	11-50	26 contacts →
	Indirect evidence “Assurance Technologies, Inc.” Source: RevenueBase Database · checked Sep 22, 2026
24	American Calibration	Partial evidence	Fox River Grove, IL, United StatesHQ checked Sep 22, 2026	11-50	25 contacts →
	Partial evidence “American Calibration Inc.(ACI), part of the Concept family of companies, is proudly expanding and has been serving the industry coast-to-coast for over 30 years.” Source: RevenueBase Database · checked Sep 22, 2026
25	Made To Measure Metrology	Indirect evidence	East Dundee, IL, United StatesHQ checked Sep 22, 2026	11-50	22 contacts →
	Indirect evidence “Who we are: • An ISO 17025 accredited & ITAR Registered precision measurement laboratory with a passion for improving manufacturing & engineering, through expert metrology.” Source: RevenueBase Database · checked Sep 22, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: spectrometer calibration companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names spectrometer calibration companies.
Partial evidence: Its own public description names part of spectrometer calibration companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name spectrometer calibration companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 264 spectrometer calibration companies based in the United States

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Spectrometer calibration companies based in the United States at a glance

As of Sep 22, 2026

40.2%Verified-email coverage

16.4Average contacts per company

11-50Median size (employees)

3.0%Largest-city concentration · Houston

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

122

11-50

109

51-200

201-500

501-1,000

1,001-5,000

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 264 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among spectrometer calibration companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “spectrometer calibration companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names spectrometer calibration companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among spectrometer calibration companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,743 across the full list. 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 September 22, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names spectrometer calibration companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many spectrometer calibration companies are there based in the United States?

RevenueBase identified 264 spectrometer calibration companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Transcat, headquartered in Rochester, tops this list with the largest team on record.

Which city has the most spectrometer calibration companies?

Houston leads with 8 headquartered companies, followed by San Diego (5) and Fort Wayne (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,743 verified decision-maker contacts tracked across these 264 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 2026.

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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 Smart Search, 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.