DOUGLAS
SENSORS
Douglas Sensors are used to measure Ambient Conditions
and signal Relays ON or OFF.
Dual Technology Occupancy Sensors
Douglas provides three different types of dual technology
occupancy sensors which utilize both PIR (passive infrared)
and sound detection to sense motion. This enables the sensors
to detect large motion to turn on lighting loads and use Microphonics
technology to keep the lights on. This approach is particularly
useful if parts of the space are obstructed from the sensor's
view.
Ceiling mount (including a model for very high ceilings), corner
mount and wall mount models are available.
PIR Occupancy Sensor
The Douglas WRM-5104 ceiling-mount PIR Occupancy Sensor
has 4 relay outputs and 1 contact output. The relay connected
to each relay output can be individually switched by a wall
switch and grouped switched by the Sensor. Ideal for classrooms
or other multi-circuit rooms requiring combined switch and
sensor controls (see circuit at left).
The occupancy sensor can be set for ON/OFF or OFF Only control.
OFF Only is used when the occupancy sensor is combined with
wall switches.
For large spaces, like an open office plan, several occupancy
sensors can be combined to cover the entire area.
Indoor Daylight Sensor
The WPC-5621K Indoor Daylight Sensor is ideal for ON/OFF
daylight harvesting applications. The Daylight Sensor has
1 relay output, 1 contact output and an enable/disable input.
The WPC-5621K Sensor detects the combined natural and artificial
light levels and when the light level exceeds the set value,
it switches OFF the light. To compensate for the sudden decrease
in light measured, the sensor has an adjustable 'deadband'
that prevents the sensor from switching the light back ON.
The light level measured has to drop below the deadband to
switch the light back ON.
For applications the use dimmable electronic ballasts, use the WPC-5700 Regulating Daylight Sensor.
Outdoor Photo and Temperature Sensors
These sensors connect to a Controller, which in turn triggers
the output relays in response to the sensor's' readings. Adjustments
are made at the controller.
Product Details, Douglas Sensors:
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