250f Temp Sender1/8-27np

The VDO 250F Temp Sender 1/8-27NP is a precision electric temperature switch engineered for reliable thermal monitoring and protection in automotive, marine, and industrial cooling systems. This compact sender activates at 250 degrees Fahrenheit, delivering critical on/off signaling to engine control units, dash gauges, and cooling fan circuits. Trusted by technicians and OEM manufacturers, this temperature switch prevents engine overheating by triggering cooling system responses before dangerous heat levels develop.

The 250F Temp Sender features a 1/8-inch NPT male thread connection that integrates directly into engine blocks, cylinder heads, or coolant manifolds without adapters. VDO's proven bimetallic switching mechanism responds instantly to temperature changes, ensuring precise activation at the 250-degree setpoint with minimal drift over extended service intervals. The sealed electrical connector and corrosion-resistant brass body withstand harsh coolant environments and vibration-heavy under-hood conditions, making it ideal for stock replacements and performance cooling upgrades alike.

Rebuilders, fleet technicians, and engine builders rely on the VDO 250F Temp Sender for consistent fan relay actuation and gauge accuracy in street machines, trucks, and marine powerplants running 250-degree coolant setpoints. Direct NPT installation requires no machining—simply thread into existing boss provisions. Compatible with both positive and ground-switched cooling fan circuits, this sender delivers the durability and repeatability that professional mechanics demand for temperature control systems.