The device actually works very precisely. Have the calculated dew point temperature verified in practice several times with Infrarothermometer they -and true: Condensation is where component surfaces precisely from that temperature a which calculates the TFA. Conclusion: technically flawless device. Small drawback: The sensor is located on a very short base and therefore can not be inserted into holes, holes etc., just as the construction expert with Thermohygrometern sometimes likes to do.
