Manufacturing of parts and accessories for electricity and…

Facility	City	State	Employees	Status
Peak Scientific INC	Westford	MA	20–99	● ACTIVE
Perceptra Technologies, INC.	Oakland	CA	—	● ACTIVE
Photonics Industries International, INC	Ronkonkoma	NY	—	● ACTIVE
Photothermal Spectroscopy CORP.	Santa Barbara	CA	—	● ACTIVE
Physical Electronics Usa, INC.	Chanhassen	MN	—	● ACTIVE
Pickering Laboratories, INC.	Mountain View	CA	—	● ACTIVE
Pike Technologies of Wisconsin, INC.	Madison	WI	—	● ACTIVE
Polylc, INC.	Columbia	MD	—	● ACTIVE
Polymedco Cancer Diagnostic Products LLC	Cortlandt Manor	NY	—	● ACTIVE
Power Test, LLC	Sussex	WI	20–99	● ACTIVE
Pp Systems International, LLC	Amesbury	MA	—	● ACTIVE
PSPrecision Systems INC	Natick	MA	—	● ACTIVE
PSPreiser Scientific INC	Saint Albans	WV	—	● ACTIVE
Princeton Research Instruments INC	Princeton	NJ	—	● ACTIVE
PTPronk Technologies INC.	Sun Valley	CA	20–99	● ACTIVE
Protein Technologies INC	Tucson	AZ	—	● ACTIVE
Qiagen, LLC	Germantown	MD	—	● ACTIVE
Qiagen Sciences LLC	Germantown	MD	—	● ACTIVE
Q-tech CORP	Cypress	CA	—	● ACTIVE
Quintron Instrument Company, INC.	New Berlin	WI	—	● ACTIVE
Rantec Microwave Systems, INC	Escondido	CA	—	● ACTIVE
Rapid Micro Biosystems, INC.	Lowell	MA	—	● ACTIVE
Rki Instruments, INC.	Union City	CA	—	● ACTIVE
Robson Technologies, INC.	Morgan Hill	CA	—	● ACTIVE
Ruckus Wireless, LLC	Sunnyvale	CA	—	● ACTIVE

FactoryRegistry lists 2,305 facilities whose primary industry classification is one of the 2 industries above. This is a list by industry, not a list of makers: Census reports that establishments in these industries produced parts and accessories for electricity and electrical signal indicating and recording instruments, in the shares shown above, and does not say which establishments. Where a plant’s own website or a federal registry names what that plant makes, it appears on the plant’s own page with the source named.

The U.S. Census Bureau recorded this product line in 2 US manufacturing industries in the 2022 Economic Census, as the most specific line those industries reported. At least 34 establishments reported producing it; the count for 1 of those industries was withheld.

These are counts of establishments by industry: the Economic Census publishes them as industry totals and never as a list of plants.

NAPCS collection code 2045230009. Source for the product line, the establishment counts and the shares: U.S. Census Bureau, 2022 Economic Census (ECNNAPCSIND2022). Federal source data is public domain. Facility records are compiled separately by FactoryRegistry and carry their own sources.