Omega Engineering Inc. offers RTD probes, elements, and assemblies, including sanitary sensors, such as their PRS-M12 series RTD sensors, 3-A spprived with an M-12 connector, for hygienic, clean-in-plae, and sanitary applications with a 4-pin connector and 1.5" 16 AMP tri-grip fitting, in prove lengths of 3", 4", 5" or 6", with a temperature range from -50 to 200C and is compatible with 3-wire and 2-wire RTD instruments and transmitters.

Minco makes RTD sensor probes which are mineral insulated to 650C, with single and dual elements. Types include tip sensitive RTDs, electrically isolated RTDs, bayonet mount tip sensitive type, fast response types, and 550C RTD types. Their fast response RTDs are encased in stainless steel with a copper alloy tip, with a max case length of 48", and can withstand 10 to 2000Hz at 20Gs minimum vibration.

Pyromation makes resistance temperature detectors and sensors, including bearing sensors, non-intrusive single and double wall sensors, tri-clamp sensors, can-style sensors, plastic detectors, explosion proof sensors, Teflon-coated RTD assemblies, heat tracing RTDs, averaging sensors, thermostat sensors, and variable length RTD sensors. Their plastic sensors include melt-bolt type, spring- or armor-adjustable immersion RTDs, threaded nozzle sensors, and ring RTDs.

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.

TTEC sells precision platinum RTDs including those with a weatherproof head and stainless steel fitting, spring-loaded 1/2" NPT connections, low temperature models, and other sensors. These RTDs come in single or dual element types with 2, 3, 4, 6, or 8 wire leads and a maximum temperature of 400F, 900F, or 1200F.