Temperture Sendin Unit 1/2 NPT

The Temperature Sending Unit 1/2 NPT is a precision instrumentation component designed for automotive and industrial cooling system monitoring. This sending unit converts engine coolant temperature into an electrical signal for dash-mounted temperature gauges, making it essential for operators who need real-time thermal data to prevent overheating and engine damage. The 1/2-inch NPT male thread fitting integrates seamlessly into factory or custom cooling systems, providing reliable temperature feedback across a wide range of operating conditions.

Built by Classic Instruments, this sending unit employs a thermistor-based sensing element that delivers accurate temperature readings proportional to coolant temperature. The 1/2 NPT male thread allows direct installation into engine blocks, water manifolds, or coolant outlet housings without requiring adapters or fittings in most applications. The compact design—measuring 3.2 x 1.1 x 3.4 inches and weighing just 0.16 lbs—ensures minimal interference with surrounding engine components while maintaining robust electrical shielding and corrosion-resistant construction for extended service life.

Technicians, hot rodders, and fleet operators benefit most from this sending unit when upgrading older gauge systems or replacing failed temperature sensors. Installation is straightforward: thread the unit into the designated 1/2 NPT port, connect the sender wire to a compatible Classic Instruments gauge or universal temperature gauge, and verify electrical continuity. This component is compatible with both analog electromechanical gauges and modern digital instrument clusters, making it ideal for restoration projects, performance builds, and diagnostic applications where precise temperature monitoring is non-negotiable.