Description
The Siemens Building Technology QFA3171D Outdoor Air Relative Humidity and Temperature Sensor is an instrument that is used to regulate the conditions of the HVAC systems by giving a precise reading of the humidity and temperature. It uses electronic sensing units to detect relative humidity and temperature to provide a 4-20 mA output and show current values on an in-built LCD. It allows control of the ventilation process efficiently, ensures the comfort of the indoor atmosphere, and secures the work of the system.
