E+E Elektronik GmbH has succeeded in producing the first ever true monolithic humidity / temperature sensor manufacturer – the HMC01.
The HMC01 design is extraordinary, because on one and the same thin glass substrate the temperature sensor and directly above the moisture sensor is located.

The monolithic design creates an exceptional thermal connection between the humidity and temperature element, allowing for extremely accurate measurements in moderate to high levels of humidity.

For measurement in continuous high humidity with even the risk of condensation, the sensor can be operated in a controlled heating mode to prevent high humidity drift. The temperature sensor is used as a heating element and is regulated in such a way that the relative humidity close to sensor is kept at 76 %RH. In this manner the sensor is not subjected to stress caused by high humidity.

The temperature sensor can also be used to regularly heat up the humidity sensor to high temperatures for regenerating it. This function is beneficial in demanding applications in industrial processes where there are high concentrations of chemicals, solvents or cleaning agents. Heating up the sensor expels foreign molecules and the humidity sensor will be cleansed, so to speak. A possible measurement drift will be corrected. The humidity sensor returns to its original calibration and quickly starts to deliver accurate measurements again.