General Purpose and Omni-directional Quad Element Pyroelectric
Infrared Radial Sensor
The pyroelectric infrared sensor detects infrared radiation on the basis of the
characteristics that the self-polarization of pyroelectric material changes with
temperature. Quad sensing elements are applied to suppress the interference resulting
from circumstance temperature variation, to raise signal output and to be sensitive in
all directions. This type senor has the technical merits of both single and dual type.As
a result, the operating stability of the sensor is greatly improved. It can be widely used
in many applications such as in automatic light switch control,security systems,
burglar alarms, visitor acknowledgement and intellectualized toy, etc.,especially in the
field of ceiling mount applications.

Recommended Model D205B big window
Encapsulation Type TO-5
IR Receiving Electrode 0.7×2.4mm, 4elements
Window Size 4.9×4.9mm