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The MAGNASPHERE CORP MSS-303C-BROWN is a recessed magnetic contact switch configured with three switches and three closed-loop outputs. Designed for special application contact scenarios, this unit installs flush within a door frame, window frame, or structural surface to monitor open or closed status. The recessed form factor keeps the sensor concealed and protected from physical interference. It is sold as a single unit and is appropriate for security, access control, or supervisory control wiring tasks handled by licensed electricians or low-voltage alarm system technicians.
This contact switch is suited for installations where a standard surface-mount sensor is not appropriate due to aesthetic requirements, tamper resistance needs, or space constraints. The three closed-loop switch configuration supports multi-zone or redundant monitoring setups within a single recessed housing, making it a practical choice for commercial or residential security panels requiring multiple supervised circuits from one opening point.
Designed as an OEM-style recessed magnetic contact switch for special application contact installations requiring a three-switch, three closed-loop configuration.
Installation is typically performed by a licensed electrician or certified low-voltage alarm technician in accordance with applicable NEC low-voltage wiring requirements. Power down or disarm the associated security or control panel before wiring the switch outputs. Drill the recess cavity to the correct diameter and depth before seating the unit to avoid cracking the housing. Follow the panel manufacturer wiring diagram for loop supervision connections rather than assuming wire color assignments.
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