Sentrol's 2700 Series high security magnetic contacts with triple biased reeds are highly resistant to defeat by external magnet. For added security, magnetic field tamper and pry tamper are standard features. Each 2700 contact and actuation magnet set is factory compensated for the effects of steel.
HIGH SEC ANODIZ DPDT TRIP BIAS, UTC Fire & Security Company ADI, UTC Fire & Security
INTERLOGIX,Intrusion Contacts,Surface Mount Contacts