Digital Temperature & Humidity meter PH-1000 Zeal, England. Digital Hygrometer
Thermo-Hygrometer model PH1000 displays humidity over the range of 10 to 99%rh and temperature over -50 to + 70°C or equivalent °F with a 0.1°C/°F resolution. It also incorporates a 12/24 hour clock. Instrument is housed in a white ABS case which has a foldaway stand and keyhole slot for wall hanging.
Reads temperature and records maximum / minimum temperatures the unit has been exposed to since the last time the unit has been reset.
Temp: -50ºC/+70C (-58ºF/+158ºF) Humidity: +10%RH to 99%RH
Temp: +/- 1ºC (2ºF) Humidity: +/- 5% RH
Temp: 0.1ºC (0.1ºF) Humidity: 1%RH
One 1.5 volt AAA