The DK502-POM is a miniaturized Datalogger for measuring humdity and temperature. The principle of measuring humidity is based on a capacitive sensor, which is very precise with a quick response time and a good long term stability. The logger can be used in many applications. The housing of the logger is waterproof (IP65) to protect the electronics against humidity. The material used is a rugged POM-plastic. Of course the sensor must be in the medium to be measured, so that the sensor is in the wet air. The big advantage for the users is that the sensor can be changed by them-selves.