Series HYGRASGARD® ESFF humidity sensors are used for measuring the relative humidity of air in pressure systems and convert these measured values into standard signals of 0 – 10 V or 4…20 mA. Process connection by G 1/2” straight pipe thread, with terminal box enclosure made of impact-resistant plastic and enclosure cover with quick-locking screws. These screw-in humidity sensors are to be operated in pollutant-free non-precipitating air, mounted vertical with the sensor pointing down.