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The TANE ALARM met-201b-ar is a heavy duty normally closed metal contact sensor designed for commercial security and access control installations. Built for demanding environments, this hardwired magnetic contact provides a reliable circuit break when a door or window is opened. The normally closed configuration is standard for security loop wiring, where an open circuit triggers an alarm condition. Licensed security installers and commercial electricians specify this contact type for perimeter protection on entry points that see heavy daily use.
The met-201b-ar is suited for commercial applications where a wide gap tolerance between the sensor body and magnet is required. Typical install locations include heavy steel doors, industrial roll-up doors, and wide-frame entry points where standard low-profile contacts cannot bridge the gap reliably. It is also a strong fit for retrofit projects where surface-mount hardware is preferred over recessed installation.
Designed as an OEM-style replacement or new-installation contact for commercial hardwired security and alarm systems requiring a normally closed metal door or window sensor.
Installation is typically performed by a licensed security technician or commercial electrician. Disconnect or disarm the alarm panel loop before wiring the contact to prevent false triggers during installation. Align the sensor body and magnet so the gap does not exceed the rated tolerance, and verify loop continuity with a multimeter before commissioning. Follow local electrical codes and the alarm panel manufacturer wiring guidelines when integrating into an existing security loop.
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