Siemens QFA3171 Temperature and Humidity Sensor Outdoor Air Relative Humidity Index Track and monitor relative humidity/temperature sensors and transmit temperature and humidity shifts to control system design. Standard available Models are rated at 2 % and 2 %, for humidity only and for the combination of humidity and temperature sensing. Sensors are available with 4 to 20 mA or 0 to 10-volt input signals.
Applications: Foodstuff, Medicine, Restaurants, Transportation, and industries by the HACCP system certification