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