Ultra Electronics is a supplier of head-mount, programmable temperature transmitters; head-mount temperature transmitters; head mount, programmable RTD temperature transmitters; DIN, rail-mount temperature transmitters; and DIN, rail-mount programmable temperature transmitters.

Thermocouple Technology Inc. engineers and designs an isolated, 2-wire, in-head transmitter for temperature and other measurement applications. The company also design compatible intelligent transmitters.

Pyromation manufactures mounted or surface-mounted, programmable temperature transmitters that send a scaleable 4 to 20 mA signal from a temperature sensor to a control device, without investing thermocouple or RTD wire. Some of the company's transmitters are approved for use in hazardous locations.