50' Vehicle Sensor Exit Wand (FM138)

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The Mighty Mule FM138 driveway vehicle sensor delivers reliable automatic gate exit detection with easy DIY installation. Designed as a direct burial sensor, this magnetic field ve hicle detector uses a 50‑foot cable to sense metal in motion and open your gate seamlessly as you leave. You’ll enjoy straightforward DIY gate sensor installation 3–50 feet from your gate—no electrician required. Direct burial design with 50‑foot cable trenches up to 12 inches deep for flexible placement. 12‑foot magnetic field detection senses cars, trucks, ATVs, and motorcycles as they cross the field. Works with both single and dual gate systems to automate every exit. Connects directly to your gate opener control box for instant metal‑in‑motion sensing. Backed by a 12‑month Mighty Mule warranty and lifetime technical support. Pairs easily with other Mighty Mule accessories for enhanced security and convenience. Installation Manual Show more