ULTIMETER Solar-Shielded Outdoor Humidity/Temperature Sensor (with 40-ft. sensor cable) The ULTIMETER Solar-Shielded Outdoor Humidity/Temperature Sensor can be mounted in direct sunlight, avoiding high-temperature inaccuracies by shielding the sensors from the rays of the sun. It is an optional sensor for ULTIMETER 800 or 2100 Weather Stations. Mounts to antenna mast pole (using u-bolts provided) or to a vertical wall. The ULTIMETER Humidity Sensor utilizes a precision thick film polymer capacitance device The ULTIMETER Temperature Sensor is a precision aged thermistor. The exceptional long-term stability of the humidity sensor element means years of use without recalibration. Operates over the full humidity range, from 0% to 100% R.H. Temperature range is -55 F to 150 F. Includes 40-ft cable and mounting hardware (longer cable lengths optional).