OPUS 20 Series loggers for Temperature Humidity along with an additional parameter of either CO2, Dewpoint or atmospheric pressure. 3.200.000 value memory Windows software and interface-cable included Adjustable alarm settings Big LCD for all measuring sizes Adjustable intervall 1 min. up to 24 hours High accuracy (± 0,3°C) and (+- 2% rH) Battery status indicator

Range -20°C ... +50°C
Resolution 0,1°C
Accuracy ± 0,3°C (0°C ... 40°C) otherwise ± 0,5°C
Range 0...100%rH
Resolution 0,5%rH
Accuracy ± 2,0%rH
Working temperature -20°C ... +50°C
Power supply 4 1,5V AA Mignon battery or external power supply (sold separately)
Battery life typically 2 years (depends on the logging intervall)
Dimensions 166 x 78 x 32 mm (L x B x H)
Weight 250 g