Constant Lux Meter LG40

Measurement Range : 200, 2000, 20000, 40000 lux/ fc ( 1fc = 10.76lux) Accuracy : ± 5% rdg ± 10dgts ( 10000 lux/ fc) Repeatability : ± 2% Measurement rate : 2.5 times per second, nominal Temp. Characteristics : ± 0.1% / ° C Photo detector : one silicon photo diode with filter Display : 1999 counts Indication : polarity, over range, low battery Storage temperature : -10 ~ 60° C ( 14 ~ 140° F) at 80% RH Operating temperature : 0 ~ 40° C ( 32 ~ 104° F) Operating humidity : 0 ~ 80% RH Auto power off : ± 17 minutes Power : 9V battery Size : 157 x 54 x34mm Weight : ± 170g Accessories : battery, instruction manual, warranty card, certificate of product conformance