Grade 3 White Surface Door Contact with Magnetic Detection - Type A Resistor (For Honeywell, Microtech (Galaxy)) [SC513/WH/G3/A] The SC513/WH/G3/A Grade 3 White Surface Door Contact with Magnetic Detection Type A Resistor used For Honeywell, Microtech (Galaxy) are suitable for a wide range of applications and can be used in Ungraded, Grade 1, Grade 2 and Grade 3 systems. These contacts are required to have a mechanical tamper and/or be potted/sealed. End of Line (EOL) resistors are also an option. They should also detect or be immune to rogue magnets. A range of contacts in plastic which can be surface mounted and which will suit most domestic and commercial installations. Features: Pre-resistored Magnetic detection 10mm Operating gap Also Available in Brown Specification: Connections: 4- Core Pre-wired Reed Switches: 1 Operating Gap: 10mm Material: Polystyrene Size mm: 65 x 13.5 x 13mm Contact Form: SPST form A Voltage Range: 1-50vDC Switc