G
Light sensor
Light sensor
PHOTASGARD
®
Light sensor
PHOTASGARD
®
The sensor used in
PHOTASGARD
®
light intensity sensors 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 measure ment of daylight and ⁄ or
for measuring artificial light of high colour temperature (similar to sunlight).
Characteristic curve showing the sensor's sensitivity
in function of the angle of incidence of light.
Characteristic curve showing the sensor's
sensitivity in respect of the wavelength of light.
The broken line represents the light perception
of the human eye.
500
400
300
600
CIE
SENSOR
700
800 900nm
0%
100%
20%
40%
60%
80%
120%
40°
50°
60°
70°
80°
90°
100°
1.0
0.8
0.6
0.4
0.2
0
1.0
0.8 0.6
0.4
30°
20° 10°
0°
0° 20° 40° 60° 80° 100°
Connecting diagram
Output: 0 -10 V
Connecting diagram
Output: 4 ... 20 mA
DHKF - U
3-Wire
DHKF - I
2-Wire
(transmitter)
-
+
+
-
1 2 3 4
230V AC
24V AC/DC
PLC
PC
+U
B 2
4V A
C/
D
C
Out
put
0
-1
0
V
–U
B A
C/
D
C G
N
D
-
+
+
-
1 2 3 4
230V AC
24V DC
PLC
Working
resistance
+U
B 2
4V D
C
Out
put
4
...
20 m
A
GND
