A highly compact PIR sensor housed in a TO5 package fitted with a zoned fresnel lens. The sensor detects infra-red radiation in the low infrared spectrum (10µm wavelength) which is emitted by human movement.
The sensors are able to detect a change in temperature from object to ambient from as little as 3°C. Changes in the level of detected emission are evaluated by a window comparator and if the change exceeds the upper or lower threshold the output level of the sensor goes high and can be used to trigger external circuitry.
| Detection angle horizontal | &plusmin;45.5° |
|---|---|
| Detection Angle Vertical | &plusmin;45.5° |
| Sensor Operating Distance | 2m |
Q. Can this be used to replace a low voltage switch in a electronics project - so to switch on a backlight on a clock (for example) instead of pressing a button?
A. Hi Kev. Thank you for your question. You may be able to modify assuming that you have the correct connection voltage and room, these only send a pulse signal when movement is detected I would suspect it will not be a case of just exchange for the original switch as requires a circuit to operate the PIR sensor (see data sheet).
