The data logger OPUS 10 THI/TSE is a compact device for registration and recording of relative humidity of air and temperature; available with internal (THI) and external (TSE) sensors. The data logger has a LC-display for the present values and the time. OPUS 10 THI internal sensors: - measuring range relative humidity 10 to 95 % relative humidity (resolution 0.5 % relative humidity, accuracy ± 3 % relative humidity) - measuring range temperature -20 to +50 °C (resolution 0.1 °C; accuracy ± 0.3 K between 0 and 40 °C, otherwise ± 0.5 K) OPUS 10 TSE external sensors: - measuring range relative humidity 0 to 100 % relative humidity (resolution 0.5 % relative humidity, accuracy ± 2 % relative humidity) - measuring range temperature -30 to +70 °C (resolution 0.1 °C between -20 and +50 °C, otherwise 0.2 °C; accuracy ± 0.2 K between -20 and +50 °C, otherwise ± 0.5 K) operating conditions: - temperature -20 to +50 °C - relative humidity 0 to 95 % relative humidity, < 30 g/m³, no condensation - altitude max. 5,000 m above NN