The ultra-reliable Mercury family of detectors with look-down zone offers superior RFI, EMI, ESD and lightning protection. With the optional super immunity package the Mercury sensors are able to withstand the most hostile environments. Moreover, full area vision pet immunity and adaptive temperature compensation technologies achieve superior false alarm immunity in any type of residential installation.
EL-500pi Pet Immune K-Band Dual Technology Motion Detector

Microntroller based signal processing
Dual technology
PIR supervision
Digital adaptive temperature compensation
Dual element
ALSO mode
K-band microwave antenna
Pet immunity up to 25kg