The Honeywell Sensing and Control company came out with a state-of-the-art devices called Humidity Sensors Line Guide. Each of these sensor is customized for delivering optimized sensitivity, response time, stability and efficiency. The Sensor composition is made up of planar capacitor and shielded by a second polymer layer for dirt, dust, oils, and other harmful element protection. It allows great versatility, thanks to the printed circuit board or surface mount terminations. This devices offer collaboration with other circuity to deliver on-chip signal conditioning except for the HCH Series products. They are widely used in heating, ventilation and air conditioning equipment (HVAC), refrigeration, office automation, and medical equipment applications.