SKU: DCCDC-0448
MPN: DC-0448
The Digital Thermatic Fan Switch 1/8in NPT Sensor by Davies, Craig is a precision engine cooling control device designed for automotive enthusiasts and professional mechanics building high-performance cooling systems. This intelligent sensor replaces mechanical on/off switches with programmable electronic temperature management, giving you real-time control over electric fan activation. Whether you're tuning a street car, building a race engine, or upgrading factory cooling inadequacy, this digital switch delivers the precision needed to keep cylinder head temps in the optimal range while minimizing parasitic drag from continuous fan operation.
Built with a 1/8in NPT threaded sensor connection, the Davies, Craig unit mounts directly into engine block coolant passages, water pump outlets, or radiator coolant lines for accurate temperature reading at the source. The digital interface allows you to set custom activation and deactivation temperatures, typically enabling fans to engage at your target setpoint and disengage at a lower threshold to prevent cycling. This hysteresis function reduces electrical load spikes and extends fan motor life while maintaining consistent engine temperatures under varying load conditions—critical when managing high-output engines with marginal stock cooling capacity or custom radiators with different flow characteristics.
This thermatic fan switch is ideal for street rods, restorations, LS-swapped vehicles, and any engine conversion requiring aftermarket cooling logic. Installation involves mounting the sensor body into a 1/8in NPT boss (commonly found on aluminum water necks or custom radiator tanks), routing the sensor cable to the control module, and wiring the module's relay output to your electric fan(s). Compatibility spans most universal electric fan setups and integrates seamlessly into custom cooling loops where OEM fan relays lack the precision needed for efficient operation. Weight of 1.05 lbs keeps installation footprint minimal, and the compact 5.1 x 3.2 x 7.6 inch module fits easily under hoods with tight engine bay real estate.
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