Product Description

The human eye is sensitive to radiation from about 380 to 780 nm but is most sensitive in the middle of this range near 555 nm. The photopic luminosity function (there are different versions, but the CIE 1931 standard is widely accepted and commonly used) describes the average sensitivity of the human eye, or the average human perception of brightness, in well-lit conditions. The scotopic luminosity function describes the average sensitivity of the human eye in dimly-lit conditions.

Specifications

Output (sensitivity) : 0.001 mV per lux

Calibration Factor : 1000 lux per Mv(Reciprocal of Sensitivity)

Calibration Uncertainty : 5 %

Output Range : 0 to 200 mV

Measurement Range : 0 to 150000 lux

Measurement Repeatability : Less than 0.5 %

Long-term Drift (Non-stability) : Less than 2 % per year

Non-linearity : Less than 1 %

Response Time : Less than 1 ms

Field of View : 180

Spectral Range : CIE 1931 luminous efficiency function

Directional (Cosine) Response : 2 % at 45; 5 % at 75

Temperature Response : Less than 0.1 % per C

Operating Environment : -40 to 70 C; 0 to 100 % relative humidity

Dimensions : 30.5 mm diameter, 37 mm height

Mass (with 5 m of cable) : 140 g