Veratron Coolant Temperature Sensor - 40°C to120°C - 3/8 -18 NPTF Thread

The Veratron Coolant Temperature Sensor with 3/8 -18 NPTF thread is an OEM-grade engine monitoring component designed for accurate coolant temperature measurement across the 40°C to 120°C operating range. This sensor serves as the critical input device for engine management systems, allowing your vehicle's computer to optimize fuel injection timing, ignition advance, and cooling fan activation based on real-time thermal data. Whether you're rebuilding a marine engine, restoring a classic automotive application, or upgrading an existing cooling system, this Veratron sensor delivers the precision feedback necessary for reliable performance and emissions compliance.

Veratron's 323-801-001-007N sensor employs a thermistor-based design that translates thermal expansion into a variable resistance signal—typically outputting between 5 ohms at 120°C and 188 ohms at 40°C depending on engine specification. The 3/8 -18 NPTF thread provides a secure, leak-proof installation into engine block coolant passages or thermostat housings, with the compact 1 x 1 x 2 inch form factor allowing integration into tight engine bay configurations. Veratron's marine-grade construction ensures corrosion resistance and thermal stability, critical factors for long-term reliability in environments where coolant chemistry and operating temperatures demand durability.

Mechanics and enthusiasts upgrading cooling systems, swapping engine management systems, or troubleshooting temperature-related drivability issues will find this sensor indispensable for proper calibration and validation. The 3/8 -18 NPTF connection ensures compatibility with most Veratron engine harnesses and aftermarket ECU tuning packages, though verification of your specific engine block or thermostat housing port thread size is essential before purchase. Installation requires disconnecting the electrical connector, applying thread sealant, and torquing the sensor to manufacturer specification—a straightforward 15-minute procedure that restores accurate thermal feedback and prevents limp-mode conditions caused by faulty temperature signals.