HDE Digital Light Meter

The digital lux meter LX1010B can measure up to 50,000 lux, approximately 5,000 footcandles. It's used for checking the level of luminance, luminance is a measure of the amount of light falling on a surface. It is defined as: 'the density of the luminous flux incident on a surface'. It is the quotient of the luminous flux by the area of the surface when the latter is uniformly illuminated.. This convenient gadget is widely used in many areas such as construction, inspection, photography and etc.

Features:
High Accuracy and rapid response
Auto Zeroing
Over-range indication
LCD Display
Data Hold
Low battery alert
Specifications:
Display: 3-1/2 digit 18mm LCD
Power: 9V battery
Ranges: 0 - 50,000 Lux
Accuracy: ±5%
Sampling rate: 0.4second
Operating temperature: 32°F-122°F (0°C-50°C)
Battery life: 200 hours (estimate)
Dimensions: 4.6x2.7x1.1 inch (118x70x29mm)
Package includes:
1 piece Lux meter LX1010B,
1 piece Carrying case,
1 piece 9V battery,
1 piece User manual.

The light sensor is under the cap. You must remove the cap for it to work properly