Since 1994, I.R.I.S. Electronic manufactures IR-light barriers for indoor and outdoor usage. The IR-barriers work as sensor in intrusion detection systems, and by the German VdS they are certified into class C. Raisers at security companies are satisfied by the range (up to 100 m), the small housing (40 x 40 mm), and the easy and precise one-man-adjustment. False alarms are prevented by slave circuits.
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