Fail-safe protection
Even if a wire breaks or a sensor fails, EM301 detects the fault and alerts you.
Multiple inputs / outputs
Oil pressure, temp, alternator/charge, coolant level + 2 spare inputs, with relay output to control fuel/shutdown.
Fault memory recall
Stores up to 6 shutdown causes. Press recall and see exactly what happened last time.
Compact & reliable
Small footprint (115×90×56mm), tough build, easy mounting — perfect for tight spaces.
DIY install — friendly and fast
If you’ve ever fitted a gauge or swapped a relay, you’re ready for the EM301. Clear labels, simple DIP switches, and LED indicators keep it stress-free.
1) Power Red to key-switched +12/24V, Black to ground.
2) Outputs Use the relay (Orange COM / Yellow NO) for fuel solenoid or shutdown.
3) Sensors Wire oil, temp, alternator (Pink to D+), coolant probe (Grey). Spares = your choice.
4) Set & test Flip DIP for NO/NC senders, start engine, confirm LEDs/alerts.
Where EM301 shines
- Trucks & buses: Keep assets on the road and avoid surprise failures.
- Boats & marine: Peace of mind when you’re far from shore.
- Farm & machinery: Protect pumps, tractors, harvesters from avoidable damage.
- Generators: Reliable monitoring for stationary engines and backup power.
Buy EM301 — $580
Compact, reliable, and DIY-friendly engine protection.