The PCE-THB 38 dew point thermometer is ideal for detecting and digitally displaying humidity, temperature and barometric pressure. Temperature is measured by an RTD sensor and air humidity is measured by a highly repeatable, capacitive sensor. The dew point thermometer also calculates dew point and atmospheric pressure in a range of 10 to 1100 hPa. With all of these features, it is a complete climatological device. It is shipped from the manufacturer already calibrated. Otherwise, a laboratory calibration and certificate can be ordered which meets ISO calibration standards.