Relay Sensor
Immobilizer relay sensor for GPS trackers. Hardwired installation.
⚠️ Sensors require a GPS Device to work
Free shipping • 30-day return policy • 1-2 day handling
Complete Your Setup
Sensors require a GPS device to work. Add a GPS tracker to enable full functionality:
KnightX 300 GPS Tracker
Rechargeable 4G LTE GPS tracker with up to 45 days battery life.
Warrior X300 GPS Tracker
Rugged GPS tracker with long-life non-rechargeable battery up to 5 years. Updates once every 12 hours.
Solar GPS Tracker
Solar-powered 4G LTE GPS tracker with continuous operation. No battery replacement needed.
Hardwired GPS Tracker
Hardwired 4G LTE GPS tracker powered directly from vehicle battery. Reliable continuous tracking.
Specifications
- Immobilizer functionality
- Ignition detection
- Engine status monitoring
- Vehicle activity tracking
- Hardwired installation
- No battery required
- Compact, easy mount
Why Choose FIRST ELD?
FMCSA Certified
All our ELD devices are fully certified by the Federal Motor Carrier Safety Administration (FMCSA) and compliant with all DOT regulations.
Easy Installation
Plug-and-play installation takes just minutes. No complex wiring or professional installation required.
24/7 Support
Our customer support team is available around the clock to help with installation, troubleshooting, and compliance questions.
What's Included
Ready to Get Compliant?
Join thousands of fleets already using FIRST ELD for simple, reliable DOT compliance. Get your Relay Sensor today and stay compliant on the road.