Instrumentation

Pyromation

Pyromation, Inc. is your source for temperature sensors including thermocouples, RTD’s, and special service sensors.

A thermocouple consists of a welded ‘hot’ junction between two dissimilar metals – usually wires – and a reference junction at the opposite ends of the parent materials. Heating the ‘hot’ junction in the working environment produces a temperature gradient which generates an EMF. The EMF appears across the free ends of the thermocouple wires where it is measured and converted into units of heat calibration. Through selection of appropriate thermocouple wires and sheath components, thermocouples are suitable to be used in temperature ranges from -300 to 4200ºF (-184 to 2315ºC).

Since most RTDs have a low initial resistance, often 100 ohms, and have a small change in resistance per unit of temperature range, the resistance of the lead wire is often compensated for with a three of four wire bridge configureation built into the measuring devices. By selecting the proper elements and protective sheathing, RTDs can operate in a temperature range of -150 to 1400ºF (-101 to 760ºC).

Visit the Pyromation website at www.pyromation.com.