Manufacturing of test equipment for testing electrical, radio, and communication circuits, and motors (excluding portable instrument transformers)

Facility	City	State	Employees	Status
Prosensing INC.	Amherst	MA	—	● ACTIVE
Proto Manufacturing, INC.	Taylor	MI	—	● ACTIVE
Protonex LLC	Windsor	CA	—	● ACTIVE
Pwi, INC	Wichita	KS	—	● ACTIVE
PLPyromation LLC	Fort Wayne	IN	100–499	● ACTIVE
Qed INC	Santa Ana	CA	—	● ACTIVE
Qei, LLC	Springfield	NJ	20–99	● ACTIVE
Radius Engineering, INC.	South Salt Lake	UT	—	● ACTIVE
Ram Automation, INC	Brea	CA	—	● ACTIVE
Red Lion Controls, INC.	York	PA	20–99	● ACTIVE
Remotec, INC.	Clinton	TN	20–99	● ACTIVE
RIRenishaw, INC.	West Dundee	IL	—	● ACTIVE
Reotemp Instrument Corporation	San Diego	CA	100–499	● ACTIVE
RLReuter-stokes, LLC	Twinsburg	OH	100–499	● ACTIVE
RIRipley Industries, INC.	Iuka	MS	20–99	● ACTIVE
R.m. Johnson Co., INC	Annandale	MN	1–19	● ACTIVE
Roscid Technologies INC	Woburn	MA	—	● ACTIVE
Rosemount INC.	Shakopee	MN	—	● ACTIVE
Rti Remmele Engineering, INC.	Big Lake	MN	—	● ACTIVE
Ruelco INC	New Orleans	LA	20–99	● ACTIVE
Safran Electronics & Defense, Avionics Usa, LLC	Irvine	CA	—	● ACTIVE
Sagetech Avionics INC.	Bingen	WA	20–99	● ACTIVE
SPSaint-gobain Performance Plastics Corporation	Ravenna	OH	100–499	● ACTIVE
Santa Barbara Infrared, INC.	Santa Barbara	CA	—	● ACTIVE
Schleifring North America, LLC	Chelmsford	MA	—	● ACTIVE

FactoryRegistry lists 3,820 facilities whose primary industry classification is one of the 4 industries above. This is a list by industry, not a list of makers: Census reports that establishments in these industries produced test equipment for testing electrical, radio, and communication circuits, and motors (excluding portable instrument transformers), 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.