The normal operating range of RFM’s sensors is between -40°C to +85°C. This is based on the design rules from the semiconductor foundry. Although RFMicron cannot guarantee sensor operation beyond this temperature range, we have conducted limited high temperature experiments of up to 145°C for short time-periods.
At these elevated temperatures, RFMicron has observed a decreased read range to approximately 2 meters at 100°C and 1 meter at 145°C with degraded precision of 5° to 10° C at 145°C. The approximate error magnitude is expected to increase the further the environmental temperature is from the sensor’s calibration temperature, which is initially pre-set at 30°C.