The combined humidity (0 to 100% RH) and temperature (-10°C to +80°C) sensor for ICT environments, for installation into ICT cabinets (racks). Simple humidity and temperature sensor for indoor use, can be daisy-chained, communicating over 1-Wire. HTemp-1Wire Rack 19 sensors are designed for connecting to Poseidon2, Ares, and the HWg-STE and STE2 devices.