Temperature instruments use contact or noncontact methods to measure temperature. Products include dial, digital, industrial and laboratory thermometers; temperature probes, indicators, and sensors; RTD elements and transmitters; and thermistors, thermocouples, thermopiles, and thermal switches. There are two basic methods for temperature measurement, contact and noncontact. Within these two groupings, an engineer is likely to come into contact with six types: thermocouples, resistive temperature devices (RTDs and thermistors), infrared radiators, bimetallic devices, liquid expansion devices, and change-of-state devices. This is a generic search form for the selection of instruments, probes and elements used for the temperature measuring industry. Both contact and noncontact style devices are listed. Specific temperature device search forms are also available.