haa52 velleman, passive infrared mini intrusion detector haa52n this is a miniature pir intrusion detector. this reliable low-cost detector is suitable for general security applications. the device can be installed virtually anywhere and is protected by an rfi filter. the contact is n.c. and the haa52 offers substantial immunity from false alarms and sabotage. features dual-element pyroelectric sensor programmable pulse counter 12 vertical angle adjustment wide detection angle : 90 rfi protection wide operating voltage range: dc 8-16v surface and corner mounting specifications detection pattern: wide angle, 40ft x 40ft, 90, max 42 beams in 3 layers adjustment: vertical 0 to -12 on a calibrated scale mounting height: up to 16ft above floor level, indoor mounting only operating voltage: dc 8 to 16v current drain: 15ma typical alarm output: normally closed (fail-safe) dry relay contacts (rating : 0.5a/24v dc ; resistor of 8ohms in series with contacts) alarm activation delay: 2 to 3 seconds tamper contacts: normally closed microswitch with dry contacts (rating - 0.5a / 24v dc) detection modes: single-shot or pulse-count detection led indicator: walk-test indication on or off (selectable) dimensions: 2.2" x 1.2" x 2.9" weight: 1.76oz 5410329212520