Model AS-TE Temperature Sensor

FCI Aerospace Division provides a complete line of temperature elements and sensors that feature Resistance Temperature Detectors (RTD) and thermistors. 

The RTD provides a positive linear resistance response (ohms) to temperature. The slope of resistance change versus temperature is available in a number of values to meet a wide variety of customer requirements. 

The base resistance (Ro) is also available in a wide range of values [30 to 1,000 Ohms at 0° C (32° F)]. The elements are available as point sensors that measure the temperature at the tip of the element, or as continuous sensors that average the temperature over the entire length of the element.

FCI also provides sensors that use thermistors as temperature elements. Thermistors (Thermally sensitive resistors) are solid-state devices used for temperature measurement. FCI has integrated Positive Temperature Coefficients (PTC) and Negative Temperature Coefficient (NTC) thermistors into the temperature sensors. An NTC thermistor’s resistance changes inversely with a temperature rise, and a PTC thermistor’s resistance changes proportionally to a temperature rise.

Thermistors have a larger delta R vs. T change than platinum devices. NTC devices have a larger delta R vs. T than PTC devices. The base resistance of thermistors is typically documented at 25° C (77° F). FCI has worked with thermistors with base resistances from 1k Ohms, up to 100k Ohms.