RS Pro Grade 2 Surface Mount Alarm Contact. Cable type comes fitted with 750 mm long cable. Proximity switches primarily designed for discrete protection of doors and windows. The switches are made of aluminium housing material, a N/O SPST magnetically operated reed switch. The permanent actuating magnet is also of moulded construction to facilitate easy fixing. Normally open + supervisory loop Grade 2 Maximum switching voltage 50 VAC/ DC Maximum switching current 0.5 A Carry current Max 0.8 A Maximum power 10 W/VA Insulation resistance 100 MOhms Contact resistance 120 mOhms Operating distance 15 mm Operating temperature -40° to +85° C Aluminium housing material