🧲 Rugged, Reliable Door Monitoring for Trailers & Cargo Boxes
Peterson’s 4850 Magnetic Door Sensor is a tough, weather-sealed solution designed to help fleets monitor overhead door activity with confidence and precision.
Whether you’re triggering interior lighting, activating alarms, or feeding real-time door status to a telematics system — the 4850 gives you a reliable signal and rugged performance built for life on the road.
💡 Key Benefits:
- Simple open-loop design makes installation and wiring easy
- Durable cast-alloy housing built to survive heavy use and harsh environments
- High-strength Alnico 5 magnet with a wide 2-3/4″ (70mm) activation range
- Weather-sealed with IP66 rating for outdoor exposure
- Compatible with 12V and 24V systems
- Includes armored wire lead, matching pigtail, crimp connectors, and heat shrink
- Adjustable mounting bracket fits most door-channel widths
Whether you’re hauling freight, managing cargo doors in high-volume operations, or looking to reduce driver error — the 4850 is a smart investment that’s built to last.
Ready to increase visibility, safety, and efficiency?
Whether you’re outfitting a new trailer, upgrading an existing fleet, or looking to enhance your telematics system, the 4850 Magnetic Sensor makes it easy to monitor overhead doors with confidence and durability you can count on.
👉 Download the 4850 Product Bulletin
👉 Connect with Our Sales Team
Peterson Manufacturing Company
Founded in 1945, Peterson Manufacturing Company is a world-leading innovator in the design, engineering and manufacturing of a complete line of commercial vehicle/trailer safety lighting and harness systems. With headquarters in the greater Kansas City area, Peterson is a privately held company. An ISO 9001:2015 certified company, Peterson Manufacturing is a key subsidiary of Peterson Corporation, five highly specialized companies and nearly 700 associates working in global transportation-related industries. For more information, visit PMLights.com.