Company lists · Data refreshed September 2026

Top 25 Calibration and metrology service providers based in the United States

Name: Calibration and metrology service providers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 794 companies tracked

RevenueBase identified 794 calibration and metrology service providers headquartered in the United States as of September 2026 and tracks 13,218 professional contacts across them, including 5,417 with verified work emails. Houston is the largest hub.

This list covers calibration and metrology service providers 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 19, 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 19, 2026 86% judged on-target in blind review

794Companies

13,218Contacts tracked

5,417Verified emails

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The 25 largest calibration and metrology service providers based in the United States

Ranked by team size

Top 25 of 794 calibration and metrology service providers based in the United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to calibration and metrology service providers: 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	Applied Technical Services, LLC	Partial evidence	Marietta, GA, United StatesHQ checked Sep 19, 2026	1,001-5,000	890 contacts →
	Partial evidence “Applied Technical Services assists commercial and industrial clients by providing inspection, testing, consulting engineering, and calibration services.” Source: RevenueBase Database · checked Sep 19, 2026
2	Transcat	Partial evidence	Rochester, NY, United StatesHQ checked Sep 19, 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 19, 2026
3	Micro Precision Calibration	Partial evidence	Grass Valley, CA, United StatesHQ checked Sep 19, 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 19, 2026
4	ZYGO	Partial evidence	Middlefield, CT, United StatesHQ checked Sep 19, 2026	501-1,000	451 contacts →
	Partial evidence “Zygo is the global leader in the design and manufacture of advanced optical metrology systems and ultra-precise optical components and assemblies.” Source: RevenueBase Database · checked Sep 19, 2026
5	SPL	Indirect evidence	Houston, United StatesHQ checked Sep 19, 2026	501-1,000	442 contacts →
	Indirect evidence “SPL is a leading provider of compliance and testing services for Environmental, Energy, and other end markets.” Source: RevenueBase Database · checked Sep 19, 2026
6	Mitutoyo America Corporation	Partial evidence	Aurora, IL, United StatesHQ checked Sep 19, 2026	201-500	435 contacts →
	Partial evidence “The world’s largest metrology company was founded in 1934 by Yehan Numata with one product – the micrometer.” Source: RevenueBase Database · checked Sep 19, 2026
7	Industrial Physics	Indirect evidence	New Albany, IN, United StatesHQ checked Sep 19, 2026	201-500	430 contacts →
	Indirect evidence “At Industrial Physics, we protect the integrity of quality control, R&D, and operations experts across various industries.” Source: RevenueBase Database · checked Sep 19, 2026
8	Simco Electronics	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 19, 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 19, 2026
9	Technical Safety Services	Partial evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	501-1,000	386 contacts →
	Partial evidence “Technical Safety Services is a leading compliance, calibration and certification service provider for laboratories, hospitals, and pharmacies with locations across the United…” Source: RevenueBase Database · checked Sep 19, 2026
10	KPM Analytics	Indirect evidence	Westborough, MA, United StatesHQ checked Sep 19, 2026	201-500	244 contacts →
	Indirect evidence “KPM Analytics is a global leader in analytical instrumentation primarily focused on analyzing critical parameters within the food, agriculture, clinical and environmental sectors.” Source: RevenueBase Database · checked Sep 19, 2026
11	ATT Metrology Solutions	Partial evidence	Issaquah, WA, United StatesHQ checked Sep 19, 2026	51-200	212 contacts →
	Partial evidence “Mission: Offer full metrology solutions to our customers – which will reduce costs and improve quality significantly in their broader value chain.” Source: RevenueBase Database · checked Sep 19, 2026
12	PCI	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 19, 2026	51-200	198 contacts →
	Partial evidence “PCI provides calibration, commissioning, and consulting solutions for the life sciences industry.” Source: RevenueBase Database · checked Sep 19, 2026
13	Michelli Weighing & Measurement	Indirect evidence	Harahan, LA, United StatesHQ checked Sep 19, 2026	51-200	175 contacts →
	Indirect evidence “Michelli Weighing & Measurement provides services & equipment related to scales & measurement equipment.” Source: RevenueBase Database · checked Sep 19, 2026
14	Quartus Engineering	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 19, 2026	51-200	153 contacts →
	Indirect evidence “At Quartus, our multi-disciplinary team collaborates to deliver high-quality engineered solutions and products that help our clients change the world.” Source: RevenueBase Database · checked Sep 19, 2026
15	MSI Viking	Partial evidence	Greer, SC, United StatesHQ checked Sep 19, 2026	51-200	144 contacts →
	Partial evidence “MSI-Viking Gage is a leading supplier of precision measuring technologies representing the world's leading metrology and automation suppliers - including Hexagon, Mitutoyo…” Source: RevenueBase Database · checked Sep 19, 2026
16	FOX Valley Metrology	Partial evidence	Oshkosh, WI, United StatesHQ checked Sep 19, 2026	51-200	127 contacts →
	Partial evidence “Fox Valley Metrology is a partner to the Quality Assurance Departments of thousands of organizations worldwide.” Source: RevenueBase Database · checked Sep 19, 2026
17	Rothe Development INC	Strong evidence	Webster, TX, United StatesHQ checked Sep 19, 2026	201-500	127 contacts →
	Strong 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 19, 2026
18	API Metrology	Partial evidence	Rockville, MD, United StatesHQ checked Sep 19, 2026	201-500	125 contacts →
	Partial evidence “For more than three decades, API’s advanced dimensional metrology equipment has developed customized solutions for leading companies, like Boeing, Lockheed Martin, Northrop…” Source: RevenueBase Database · checked Sep 19, 2026
19	Black Label Services, INC	Indirect evidence	Windsor, CO, United StatesHQ checked Sep 19, 2026	201-500	117 contacts →
	Indirect evidence “At Black Label Services, we pride ourselves on delivering cutting-edge and customized services to meet the unique needs of our clients across various industries.” Source: RevenueBase Database · checked Sep 19, 2026
20	Technical Maintenance, INC	Indirect evidence	Temple Terrace, GA, United StatesHQ checked Sep 19, 2026	51-200	111 contacts →
	Indirect evidence “Who is TMI?” Source: RevenueBase Database · checked Sep 19, 2026
21	System Scale Corporation	Partial evidence	Indianapolis, IN, United StatesHQ checked Sep 19, 2026	51-200	105 contacts →
	Partial evidence “System Scale is an industrial weighing and calibration company built for facilities that cannot afford inaccurate measurements, unplanned downtime, or audit failures.” Source: RevenueBase Database · checked Sep 19, 2026
22	Mahr INC	Partial evidence	Providence, RI, United StatesHQ checked Sep 19, 2026	51-200	102 contacts →
	Partial evidence “When customers are faced with a metrology need, they turn to Mahr Inc, for unmatched industry expertise.” Source: RevenueBase Database · checked Sep 19, 2026
23	Standard Calibrations, INC	Indirect evidence	Chesapeake, VA, United StatesHQ checked Sep 19, 2026	51-200	95 contacts →
	Indirect evidence “Every Measurement Matters.” Source: RevenueBase Database · checked Sep 19, 2026
24	Oasis Alignment Services A Division Of In-Place Machining Company	Indirect evidence	Rochester, NH, United StatesHQ checked Sep 19, 2026	51-200	94 contacts →
	Indirect evidence “Precision alignment of equipment and process lines can significantly reduce or even eliminate many of the issues manufacturers face on a daily basis.” Source: RevenueBase Database · checked Sep 19, 2026
25	Radian Research, INC	Indirect evidence	Lafayette, IN, United StatesHQ checked Sep 19, 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 19, 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: calibration and metrology service providers. 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 calibration and metrology service providers.
Partial evidence: Its own public description names part of calibration and metrology service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name calibration and metrology service providers. 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 794 calibration and metrology service providers based in the United States

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Calibration and metrology service providers based in the United States at a glance

As of Sep 19, 2026

41.0%Verified-email coverage

16.6Average contacts per company

1-10Median size (employees)

3.0%Largest-city concentration · Houston

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

399

11-50

277

51-200

201-500

501-1,000

1,001-5,000

10001+

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 794 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 calibration and metrology service providers, 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 “calibration and metrology service providers”. 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 calibration and metrology service providers), 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 calibration and metrology service providers, 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, 5,417 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 19, 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 calibration and metrology service providers, 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 calibration and metrology service providers are there based in the United States?

RevenueBase identified 794 calibration and metrology service providers 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?

Applied Technical Services, LLC, headquartered in Marietta, tops this list with the largest team on record.

Which city has the most calibration and metrology service providers?

Houston leads with 24 headquartered companies, followed by Dallas (9) and San Diego (9).

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 5,417 verified decision-maker contacts tracked across these 794 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 19, 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.