THERMOHYGROMETER Type BC21 Product Trotec ( Germany) Specification 1) . Air temperature Measuring range -30 C up to 100 C ( -22 F up to 199 F) Resolution 0.1 C ( 0.1 F) Accuracy 1 C ( 1.5 F) 2) . Humidity Measuring range 0 up to 100 r.h. ( specified 5 up to 95 r.h.) Resolution 0.1 r.h. Accuracy 2 r.h. ( at 25 C and 5 up to 95 r.h.) 3) . Dew-point temperature Measuring range -30 C up to 100 C ( -22 F up to 199 F) Resolution 0.1 C ( 0.1 F) Accuracy 1 C ( 1.5 F) 4) . Wet bulb temperature ( cooling limit temperature) Measuring range 0 C up to 80 C ( -32 F up to 176 F) Resolution 0.1 C ( 0.1 F) Accuracy 1 C ( 1.5 F) 5) . Dimensions ( l x w x h) 225 x 54 x 32 mm Weight approx. 200 g ( incl. Batteries) Scope of delivery Measurement device battery storage box user manual.