Phoenix HM-34 Thermo-Hygrometer from Therma-Stor
January 8, 2001
The Phoenix HM-34 Thermo-Hygrometer is designed to provide a fast and convenient way to accurately spot-check relative humidity and temperature. According to the company, the unit is accurate to +/-2% (0-90% RH) and +/-3% (90-100% RH), and calculates Relative Humidity at 90% within 15 seconds. Manufactured for Therma-Stor Products by the Vaisala Company in Helsinki, Finland, the HM-34 automatically switches off if left idle for three minutes, preventing accidental discharge of the HM-34’s 9-volt battery.