Manufacturing of process control instruments

Facility	City	State	Employees	Status
Nova Biomedical CORP	Waltham	MA	500+	● ACTIVE
Nova Measuring Instruments INC.	Fremont	CA	100–499	● ACTIVE
Ocenco INC	Pleasant Prairie	WI	20–99	● ACTIVE
Omega Ems	San Jose	CA	100–499	● ACTIVE
Pacific Instruments, INC.	Concord	CA	20–99	● ACTIVE
Parr Instrument Company	Moline	IL	20–99	● ACTIVE
Percival Scientific Incorporated	Perry	IA	20–99	● ACTIVE
Peter Paul Electronics Co., INC.	New Britain	CT	100–499	● ACTIVE
Picarro, INC	Santa Clara	CA	100–499	● ACTIVE
Pine Test Equipment INC	Grove City	PA	—	● ACTIVE
Polarity INC.	Rancho Cordova	CA	20–99	● ACTIVE
Precision Filters, INC.	Ithaca	NY	20–99	● ACTIVE
Prime Technology LLC	North Branford	CT	20–99	● ACTIVE
QTQa Technology Company, INC.	Hampton	NH	20–99	● ACTIVE
Quality Thermistor, INC	Boise	ID	1–19	● ACTIVE
Quantum Design, INC.	San Diego	CA	100–499	● ACTIVE
Resonetics LLC	Nashua	NH	100–499	● ACTIVE
RSRichard-allan Scientific LLC	Kalamazoo	MI	—	● ACTIVE
Robert M. Hadley Company, INC.	Ventura	CA	20–99	● ACTIVE
Sable Systems International, INC	North Las Vegas	NV	20–99	● ACTIVE
Scheerer Bearing CORP	Willow Grove	PA	20–99	● ACTIVE
Sensorex Corporation	Garden Grove	CA	20–99	● ACTIVE
Siemens Manufacturing CO INC	Freeburg	IL	100–499	● ACTIVE
Si Manufacturing, INC	Anaheim	CA	20–99	● ACTIVE
Siskiyou CORP	Grants Pass	OR	20–99	● ACTIVE

FactoryRegistry lists 3,551 facilities whose primary industry classification is one of the 5 industries above. This is a list by industry, not a list of makers: Census reports that establishments in these industries produced process control 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 5 US manufacturing industries in the 2022 Economic Census, as the most specific line those industries reported. At least 45 establishments reported producing it; the count for 2 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 2017625000. 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.