- Normally closed automotive engine thermostat switch sensor.
- Dual pin 1/4" inch NPT brass thread-in temperature probe.
- Grounds or powers device upon ignition and turns off at 120'F.
- When temperature drops below 105'F the switch will re-close.
- Great for a cold start advance or engine heaters of any kind.
- Threads into any of our solid brass probes (sold separately).