S+S Regeltechnik Photosgard RHKF Series Operating Instructions, Mounting & Installation page 7

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Photodiode with glass case
Photodiode with glass case
40° 30° 20° 10°
50°
60°
70°
80°
90°
100°
1.0 0.8 0.6
Characteristic curve showing the sensor's sensitivity
in function of the angle of incidence ϕ of light.
The sensor used in PHOTASGARD® light intensity sensors (photodiode with glass case) was specifically adapted to the sensitivity of the
human eye. Its greatest sensitivity is in the range of 350 nm to 820 nm. Therefore with its special filter the sensor is predestined for
exposure measurement of daylight and ⁄ or for measuring artificial light of high colour temperature (similar to sunlight). The case of the
sensor is hermetically tight, the vision panel is protected by a glass plate.
0°
1.0
0.8
0.6
0.4
0.2
0
0.4 0° 20° 40° 60° 80° 100° 120°
PHOTASGARD ®
Photodiode with glass case
100%
Characteristic curve showing the sensor's sensitivity
in respect of the wavelength λ of light. The broken
line represents the light perception of the human eye.
80%
60%
40%
20%
0%
400 600 800
PHOTASGARD ®
1000 1200nm