Draper 12444 Handheld Digital Hygrometer - Humidity and Temperature Meter, 0-100% RH and -20 to +70°C

This handheld digital hydrometer has a built-in high precision sensor and has been designed for the measurement of humidity and temperature. It provides rapid, accurate readings displayed on an easy-to-read backlit LCD dual display. The device features data hold, min/max and auto power off. The ergonomic design is highly portable and pocket-sized. There is a low battery indicator. Requires 3x AAA batteries.

Specifications

• 1 x Handheld Digital Hygrometer - Humidity and Temperature Meter, 45-75% RH and -20-70℃
• Data update: 500ms
  Power supply: 3 x 1.5V AAA (sold separately)
  Operating time: Up to 50 hrs
  Weight (with batteries): 134.5g