This EdgeTech DewPrime I Dew Point Digital Hygrometer Monitor is in great condition and was removed from a working environment. This item came from a local lab that had surplus lightly used equipment. We can accept PayPal or your credit card. Please feel free to contact us with any questions. Please note: As seen in photos this unit is missing the dew point sensor (reflected in price). Description The EdgeTech Dew Prime I Dew Point Monitor is a micro- processor based programmable chilled mirror dew point hygrometer. Uses the dew point and ambient temperature to calculate the relative humidity. The relative humidity is 1 % to 95% and ambient temperature range: -50 to 130C.