Volumetric infrared radio detector with Fresnel lens, managed via microprocessor, for indoor or covered outdoor installation on doors or windows.

STF-B has been developed with a temperature auto-compensation technology, wich executes a continuous temperature analysis, keeping itself on average to avoid false alarms.
Besides, it can visualize the battery life status in case of low of flat battery.
It embeds a impulses counter device to adjust the sensiblity of the intruder detection and it includes a system to show the protected zone (walk test) during the installation.
Alarm signal transmission can be instantaneous or delayed and after an alarm sensor blocks next transmissions for 3 minutes, to preserve the battery.