- Published in issue 3/2019 on page 83
An ENS210 Dew Point Sensor e-BoB
With a sample implementation on Arduino UNO

Values measured for a physical parameter called ‘the dew point’ indicate not only the risk of mould growth but also corrosion of steel objects including tools. Ventilating and heating afford some control over the dew point at a certain spot. However, to do this in a sensible way, the dew point has to be determined beforehand. That is exactly what this smart device is doing.
Products
Component List
Resistors
R1;R2 = see text
Capacitor
C1 = 100nF, X7R, 0603
Semiconductor
IC1 = ENS210-LQFM, (a m s) , e.g. Mouser # 985-ENS210-LQFM
Miscellaneous
K1 = 4-pin SIL pinheader, 0.1’’ pitch
PCB, 180306-1 v. 1.0, from Elektor Store