EPIR. The ERA Pet Friendly PIR Motion Sensor is specially designed to have a detection area of 110° with an 8m radius and is suitable for households with one small pet. Pets less than 20-25kg will not be detected, however upon detection of intruders' movement, the infra red sensor will activate the alarm siren. Compatible with all ERA Alarm Systems, this product has a low power LED indication and comes supplied with all batteries.. Detection Coverage: 8m/110°. Walk Test Mode. LED intruder indication light. Tamper Protection