Cooper ATKINS® Slim Thermistor Humidity Probe, 10 to 95% RH Humidity, 1/4 in Dia x 4.9 in L Probe, ABS/PVC, 0 to 150 deg F, 150 deg F Tip, 200 deg F Cord
Measure relative humidity with SRH77A
Features slim 1/4 in Dia shaft for easy insertion in ducts