TE Connectivity’s (TE) Fresnel lens fits directly to the Passive Infrared Sensor (PIR)
on the AmbiMate MS4 Multi-Sensor Module, giving the device a detection zone of 4m
diameter at a height 2.8m. Using the adapter, supplied in the kit, the lens can be fitted
quickly and no further design consideration is needed to hold it in place. The design of
the lens is compact, disguising the sensor, giving an unobtrusive aesthetic and adding
to a clean ceiling design. Having multiple features that steer the infrared from a warm
moving body to the four detection element of the PIR sensor. The Fresnel lens design
has an 18 detection zone pattern.

More information:

Lens and Adapter Kit

MS4 Series