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Specification

SM700 is a portable Lux meter designed to perform light measurements. It is supplied with a light sensor connected to the meter that measures from 0 to 50000 Lux. Average indoor lighting range from 100 to 1000 Lux and average outdoor sun lights about 50000 Lux. Lux is a unit that indicates the density of light that falls on a surface. The human eye is sensitive only to blue, green and red light, so in calculating the Lux falling on an object, only the light that the human eye sees is counted. When only infrared light falls on an object, the Lux is counted as zero since our eyes see nothing. Mathematically, a spectral weighting function becomes convolved with the actual ilumination spectrum to calculate Lux exactly. This is the formal definition of Lux and it makes Lux an unusual unit of measure.

Specifications:

- Range: 0.000 to 1999 Lux
2000 to 19999 Lux
20000 to 50000 Lux
- Range setting: manual through key bottons
- Resolution: 1 Lux
10 Lux
100 Lux
- Accuracy : ± 6% of reading ± 1 digit
- Peak wave length: 560 nm
- Sensor type: silicon photodiode
- Sensor sensitivity: 100 scotopic Lux
- Sensor stability: ± 2% change per year( in the first two years)
- Environment: 0 to 50 C / 32 to 122 F; max RH 100%
- Battery type: 1 x 9 V ( IEC 6LR61) alkaline / approx. 150 hours of continuous use
- Auto-off: after about 5 minutes of non-use
- Weight: approx. 270 g ( meter with sensor)