The HygroPalm2-series are handheld measuring instruments for relative humidity, temperature and dew point. Three different adjustment profiles are available from the factory for the HygroClip2 (sensor probes); this means that measuring accuracy can be matched to the application need with the Hygropalm 22. The Hygropalm 21 has an integrated sensor with a measuring accuracy of ± 1.0 %rh / ± 0.2 K.