The Honeywell Sensing and Control 40FR1-3 Magnetic Reed Switch is a compact magnetic reed switch designed as a proximity sensor to detect magnetic fields and reliably switch circuits. It is specified for operation at 100 VDC and up to 120 VAC, enabling use in circuits that run on either DC or AC power. As part of Honeywell's Sensing and Control family, the 40FR1-3 delivers the durable, contact-based switching action typical of reed sensors in a small package suitable for industrial sensing tasks.
