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Description
In-ceiling light intensity sensors
PHOTASGARD® DHKF
The PHOTASGARD® DHKF light intensity measuring transducer supports six switchable measuring ranges (six devices in one). The sensor has been designed for installation in suspended ceilings. The connecting head is pluggable for quick and easy mounting. The measuring transducer is accommodated in a separate housing.
The sensor is specifically adapted to the sensitivity of the human eye. Its greatest sensitivity is in the range of 350 nm to 820 nm. With its special filter, the sensor is therefore ideally suited to exposure measuring of daylight and/or to measuring artificial light of high colour temperature (similar to sunlight).
The sensor is specifically adapted to the sensitivity of the human eye. Its greatest sensitivity is in the range of 350 nm to 820 nm. With its special filter, the sensor is therefore ideally suited to exposure measuring of daylight and/or to measuring artificial light of high colour temperature (similar to sunlight).
The sensor device is used for daylight-dependent constant light control, for controlled operation of luminaires, lighting systems, Venetian and canvas blinds, and for controlling light intensity and solar protection (shutters, blinds) to avoid unnecessary heating-up of rooms. Applications are found in green houses, storage and industrial halls, workshops, corridors, residential and commercial buildings.
Technical details
Power consumption
< 1 W at 24 V DC; < 2 VA at 24 V AC
Voltage supply
15...36 V DC
depending on working resistance, residual ripple stabilised ± 0.3 V
depending on working resistance, residual ripple stabilised ± 0.3 V
Working resistance
Ra (ohm) = (Ub -14 V)/ 0.02 A for I variant
Deviation, humidity
typically < 5 % of final value
Sensor
light sensor
Ambient temperature
–30...+70 °C
Electrical connection
2-, or 3-wire connection
0.14 -1.5 mm ² via terminal screws on circuit board
0.14 -1.5 mm ² via terminal screws on circuit board
Housing dimensions
72 x 64 x 37,8 mm (Tyr 1)
Cable gland
M 16 x 1.5, including strain relief, exchangeable,
max. inner diameter 10.4 mm
max. inner diameter 10.4 mm
Output
4...20 mA
sensor cable
PVC, LiYY, 4 x 0.14 mm²,
KL = approx. 2 m
KL = approx. 2 m
Mounting (sensor)
inside suspended ceiling,
ceiling cutout Ø = 30 mm,
cover Ø = < 35 mm
ceiling cutout Ø = 30 mm,
cover Ø = < 35 mm
Measuring ranges
multi-range switching (via DIP switches)
with 6 switchable measuring ranges
0...500 Lux/ 1 kLux/ 2 kLux/ 5 kLux/ 20 kLux/ 60 kLux
(other individual ranges optional)
with 6 switchable measuring ranges
0...500 Lux/ 1 kLux/ 2 kLux/ 5 kLux/ 20 kLux/ 60 kLux
(other individual ranges optional)
Protection class
III (according to EN 60 730)
Cable connection
cable gland, plastic (M 16 x 1.5; with strain relief, exchangeable, max. inner diameter 10.4 mm) or
M12 connector according to DIN EN 61076-2-101 (optional on request)
M12 connector according to DIN EN 61076-2-101 (optional on request)
Housing
plastic, UV-stabilised,
material polyamide, 30 % glass-globe reinforced,
with quick-locking screws
(slotted/ Phillips head - combination),
colour traffic white (similar to RAL 9016)
material polyamide, 30 % glass-globe reinforced,
with quick-locking screws
(slotted/ Phillips head - combination),
colour traffic white (similar to RAL 9016)
Connecting head
made of plastic, material polycarbonate (PC), colour white,
pluggable, Ø = approx. 35 mm, H = approx. 29 mm
pluggable, Ø = approx. 35 mm, H = approx. 29 mm
Protection type
IP 65 (according EN 60 529) Housing tested
TÜV SÜD, Report No. 713139052
IP 30 (according EN 60 529) Sensor in the built-in state
TÜV SÜD, Report No. 713139052
IP 30 (according EN 60 529) Sensor in the built-in state
Standards
CE conformity,
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU