DocRef#0510601
IR-904 Extended Life - User Guide
Page 5
Chapter 1 - Hardware
Infrared Detection Lens:
The IR-904 has two invisible beams that point out through the
INFRARED
DETECTION LENS
. The beams are at a 15 degree angle. Both beams need to be
broken to detect a target. The IR-904 needs to be installed so that the
INFRARED
DETECTION LENS
is not immediately blocked by any solid objects. (See Page 10
for more information on PIR Best Practices.)