Humidity Testers

APC AP9335TH Temperature & Humidity Sensor 0.40 lb, 0.24 Inch Height, 0.20 Inch Width, 0.20 Inch Depth

Tripp Lite E2MTHDI EnviroSense2 Environmental Sensor Module with Temperature and Humidity Monitoring

Tripp Lite E2MT EnviroSense2 Environmental Sensor Module, Temperature Monitoring, 3 ft Cable