Humidity Sensors with Long Term Stability are used for humidity, temperature and combined humidity / temperature. Nippon Instruments [India] Pvt. Ltd. Manufactures Humidity Sensors with Long Term Stability. Nippon Instruments [India] Pvt. Ltd.Is an ISO 9001 certified company that supplies a wide range of Communication Products, Timers, Counters, Energy Saving Products, and Flow Instruments. Humidity Sensors with Long Term Stability are available with the humidity range of 0-100% RH and temperature of -20 to +800C. The sensor offers excellent long-term stability, very low hysteresis and high quality.