Passive infrared motion detector with anti-masking function OPTEX SEC Division
CX-502AM

CX-502AM is the world's first Multi Anti-Masking Technology to prevent any kind of detecting disturbances by applying and developing various forms of anti-masking optical technology.

Other models:
CX-502: standard model with no anti-masking function
CX-502V: CX-502 with alarm memory

More specifications...