Ultra Electronics offers several types of resistance temperature detectors, including spring loaded types, explosion proof models, 1/2" NPT hex nipple models, direct immersion sanitary models, non-intrusive flow through sanitary sensors, autoclave temp sensors, embedded temp sensors, spring loaded bayonet fitting sensors, and more for applications including furnaces, plastics processing, textile production, medical research, and others.

MTI Industrial Sensors has general purpose RTDs, in 2, 3, and 4 wire designs in single, dual, or triplex construction. Their sheath diameters measure from .125" to .500" OD, with a mineral insulation for high temp or mechanical vibration applications. They also offer RTD elements including platinum (100, 200, 500, or 1000 OHM), Copper-10OHM, and nickel 120 OHM.

Temperature Measurement Systems offer resistance temperature detectors in platinum, nickel, copper, high accuracy, and hard pack designs. Terminal heads are offered in styles including cast iron, cast aluminum, small cast aluminum, stainless steel, polypropylene screw cover, flip top terminal heads with hinged cover, explosion proof and canister type miniature aluminum terminal heads with ceramic terminal blocks.