> Enrich.chat gives AI agents verified work emails and mobiles. To use it from an agent, read https://enrich.chat/agents.md . This is the Markdown version of https://enrich.chat/naics/334515/ # NAICS code 334515: Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals The companies classified under NAICS 334515, where they are based, how big they are and how the code maps to SIC. By Enrich.chat Editorial. Updated October 22, 2026. **Short answer:** NAICS 334515 is the code for Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals, in sector 31-33: Manufacturing. The companies counted under it are mostly small: 72% have 200 or fewer employees, and 80% are headquartered in the United States. ## What is NAICS 334515? NAICS 334515 is the code for Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals. It belongs to sector 31-33: Manufacturing. NAICS, the North American Industry Classification System, is the standard U.S. government agencies use to sort businesses by what they mainly do, and each digit narrows the category. Most of the companies counted also carry SIC 3825, Manufacturing electrical measuring instruments, in the older SIC system (81%). - 43% of the companies counted have 50 or fewer employees, and the middle one is in the 51 to 200 range. - The largest group is headquartered in the United States (80%). Within the US, California is the biggest state (33%). - Most were founded in the 1990s (29%), then the 1980s (19%). **Figure: How NAICS 334515 is built.** The code 334515 split into its parts: sector 33, then subsector, industry group, NAICS industry and U.S. industry. *The six digits of NAICS 334515. Each digit narrows the category.* ## Which companies are classified under NAICS 334515? The biggest by headcount range include Agilent Technologies, KLA, Secure Meters, Tektronix and Ideal Industries. Names link to a company profile where we have one. | Company | Headquarters | Employees | | --- | --- | --- | | [Agilent Technologies](https://enrich.chat/company/agilent-technologies/) | Santa Clara, CA | 10,001+ | | [KLA](https://enrich.chat/company/kla/) | Milpitas, CA | 10,001+ | | Secure Meters | Udaipur, India | 5,001 to 10,000 | | [Tektronix](https://enrich.chat/company/tektronix/) | Beaverton, OR | 1,001 to 5,000 | | Ideal Industries | Sycamore, IL | 1,001 to 5,000 | | Amphenol Tcs | Nashua, NH | 1,001 to 5,000 | | Doble Engineering | Marlborough, MA | 501 to 1,000 | | Solace | Kanata, Canada | 501 to 1,000 | | Vtech Solution | Washington, DC | 201 to 500 | | Teledyne Lecroy | Chestnut Ridge, NY | 201 to 500 | | Midtronics | Willowbrook, IL | 201 to 500 | | Prostarm Info Systems | Mumbai, India | 201 to 500 | | Richardson Rfpd | Downers Grove, IL | 201 to 500 | | Oz Optics | Ottawa, Canada | 201 to 500 | | Accuenergy | Toronto, Canada | 201 to 500 | | Ecs Inc International | Lenexa, KS | 201 to 500 | | Circuit Check | Maple Grove, MN | 201 to 500 | | Radian Research | Lafayette, IN | 201 to 500 | | Erp Power | Westlake Village, CA | 201 to 500 | | Keysight Technologies Canada | Mississauga, Canada | 201 to 500 | | Dynamic Ratings | Sussex, WI | 51 to 200 | | Bpm Microsystems | Houston, TX | 51 to 200 | | Enersponse | Newport Beach, CA | 51 to 200 | | Precision Nanosystems | N. Vancouver, Canada | 51 to 200 | | Elspec Engineering | Caesarea Industrial Park, Israel | 51 to 200 | The table shows the 25 biggest by headcount range, with ties broken by audience size. The charts and percentages below cover every company counted for this page, not just these 25, and companies with fewer than 11 employees are not counted. Headquarters is the location on each company's public profile. ## Where are NAICS 334515 companies based? The largest groups are headquartered in the United States (80%), Canada (9%) and India (4%). **Figure: Where companies in NAICS 334515 are based.** Bars for the share of counted companies in NAICS 334515 headquartered in each country: United States 80%, Canada 9%, India 4%. *Share of counted companies in NAICS 334515 by headquarters country.* Within the United States, California (33%), Illinois (7%) and New York (7%) lead. **Figure: US headquarters of companies in NAICS 334515, by state.** A tile map of the United States shaded by the share of counted US companies in NAICS 334515 headquartered in each state. The largest are California 33%, Illinois 7%, New York 7%. *Share of counted US companies in NAICS 334515 by headquarters state. The three largest states are outlined.* ## How big are the companies counted for NAICS 334515? 43% of them have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. **Figure: Size of companies in NAICS 334515.** Seven columns for the share of counted companies in NAICS 334515 in each employee range: 11 to 50 43%, 51 to 200 28%, 201 to 500 16%, 501 to 1,000 3%, 1,001 to 5,000 5%, 5,001 to 10,000 1%, 10,001+ 3%. *Share of counted companies in NAICS 334515 in each employee range.* ## How NAICS 334515 compares - 43% of companies in NAICS 334515 have 50 or fewer employees, against 60% across all NAICS codes on this site. - California holds 33% of the US companies here, against 14% across all NAICS codes on this site. ## How do NAICS 334515 companies describe themselves? A code is assigned by classification, and a company does not choose its own, so the label a company uses for itself can differ. The most common labels here are Appliances; Electrical; and Electronics Manufacturing (53%), Semiconductor Manufacturing (11%) and IT Services and IT Consulting (7%). **Figure: How companies in NAICS 334515 describe themselves.** Bars for the share of counted companies in NAICS 334515 that give each industry on their public profile: Appliances; Electrical; and Electronics Manufacturing 53%, Semiconductor Manufacturing 11%, IT Services and IT Consulting 7%, Automation Machinery Manufacturing 5%, Utilities 5%, Electrical Equipment Manufacturing 4%. *Share of counted companies in NAICS 334515 by the industry they list on their public profile.* ## NAICS 334515 and the SIC system NAICS replaced SIC in 1997, but the two do not line up one to one: companies filed under one NAICS code can carry several SIC codes. These are the ones seen most. | Code | Title | Share of counted | | --- | --- | --- | | SIC 3825 | Manufacturing electrical measuring instruments | 81% | | SIC 3829 | Manufacturing measuring and controlling devices | 7% | | SIC 3827 | Manufacturing optical instruments and lenses | 3% | ## Where NAICS codes come from NAICS is maintained by the U.S. Census Bureau with Canada and Mexico and revised every five years; the current edition is NAICS 2022. To check exactly what a code includes, search the [official NAICS index](https://www.census.gov/naics/) or read the Census Bureau's [guide to understanding NAICS](https://www.census.gov/programs-surveys/economic-census/year/2022/guidance/understanding-naics.html). Pick a code by what a company mostly does, not by who it sells to. ## How do you reach the people at NAICS 334515 companies? The people to talk to are usually operations, supply chain and procurement leaders. You can build the list from this code in three prompts to your AI agent. ### 1. Count them (free) Counting who matches never uses credits. ```text Use www.enrich.chat to count the companies with NAICS code 334515 (Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals) ``` ### 2. Find the people (5 credits per person) Name the roles you sell to. Each person returned is 5 credits, and name, title and company are included. ```text Use www.enrich.chat to find the operations, supply chain and procurement leaders at companies with NAICS code 334515, with their titles ``` ### 3. Get their work emails (10 credits each) An email is 10 credits only when one is found. Every email comes with a status: verified, catch-all or unknown. ```text Use www.enrich.chat to find the work emails for these people and tell me which ones are verified ``` ## More to explore Codes next to it: [NAICS 334510: Electromedical and Electrotherapeutic](https://enrich.chat/naics/334510/) Others in sector 31-33: [NAICS 325412: Pharmaceutical Preparation Manufacturing](https://enrich.chat/naics/325412/)[NAICS 326199: All Other Plastics Product Manufacturing](https://enrich.chat/naics/326199/)[NAICS 339112: Surgical and Medical Instrument](https://enrich.chat/naics/339112/)[NAICS 336390: Other Motor Vehicle Parts Manufacturing](https://enrich.chat/naics/336390/)[NAICS 332710: Machine Shops](https://enrich.chat/naics/332710/)[NAICS 312130: Wineries](https://enrich.chat/naics/312130/)[NAICS 333111: Farm Machinery and Equipment Manufacturing](https://enrich.chat/naics/333111/)[NAICS 334413: Semiconductor and Related Device](https://enrich.chat/naics/334413/) ## Frequently asked questions ### What is NAICS code 334515? NAICS 334515 is the code for Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals, in sector 31-33: Manufacturing. ### What is the SIC code for NAICS 334515 (Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals)? 81% of the companies counted carry SIC 3825 (Manufacturing electrical measuring instruments), but the two systems do not map one to one. ### Which companies are classified under NAICS 334515? The biggest by headcount range include Agilent Technologies, KLA, Secure Meters, Tektronix and Ideal Industries. The page lists 25 with links to their profiles where we have them. ### Where are NAICS 334515 companies based? The largest groups are headquartered in the United States (80%), Canada (9%) and India (4%). ### How big are the companies in NAICS 334515? 43% have 50 or fewer employees, and the middle one is in the 51 to 200 range. Companies with fewer than 11 employees are not counted. ### Is NAICS 334515 the same as a SIC code? No. NAICS replaced SIC as the U.S. federal standard in 1997, and the two do not map one to one. The SIC code seen most among these companies is 3825. ## Try this prompt Find the people at NAICS 334515 companies ```text Use www.enrich.chat to find the operations, supply chain and procurement leaders at companies with NAICS code 334515, with titles and verified work emails ``` ## Related - [Companies using a technology](https://enrich.chat/companies-using/) - [NAICS 334510](https://enrich.chat/naics/334510/) - [Tech stack lookup](https://enrich.chat/tools/tech-stack-lookup/)