Voltcraft ht 200 thermo hygrometer voltcraft ht 200 the voltcraft ht 200 thermo hygrometer is perfect for quickly checking humidity and temperature with its high quality branded sensor use in homes greehouses laboratories stores etc or wherever humidity is an important factor the dew point measurement can help to identify the conditions for mould formation the unit has a back lit display for ease of use and comes with a handy storage case we also supply a wide range of other a href