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M14 x 1.5 Thermal Sensor suits Digital Thermatic® Switches

M14 x 1.5 | Part Number: 18420

The Davies Craig M14 x 1.5 Thermal Sensor (#18420) is a genuine replacement coolant temperature sensor designed for use with compatible Davies Craig Digital Thermatic® Fan Switches and Digital Gauge Fan & Electric Water Pump Controllers.

Designed to install directly into an existing M14 x 1.5 threaded coolant port, this sensor provides fast and accurate coolant temperature measurement for improved electric fan and electric water pump control. It is an ideal alternative to the standard 1/4" NPT and optional 1/8" NPT & M12 x 1.5 sensors, allowing simple installation into many OEM thermostat housings, cylinder heads and radiators without requiring additional adapters.

Manufactured to Davies Craig's high-quality standards, the M14 x 1.5 Thermal Sensor delivers reliable performance for street, performance, 4WD, motorsport and custom cooling applications.


Features & Benefits

  • Genuine Davies Craig replacement thermal sensor
  • Direct fit for M14 x 1.5 threaded coolant ports
  • Measures actual engine coolant temperature for greater accuracy
  • Faster response than radiator fin-mounted probes
  • Simple installation using existing OEM coolant ports
  • Parallel thread design for secure sealing
  • Includes crush washer for leak-free installation
  • Ideal replacement or spare sensor
  • Designed for reliable long-term performance

Compatibility

Compatible with:

  • Digital Thermatic® Fan Switch #0480, 0481, 0482, 0483, 0484, 0485, 0488
  • Digital Gauge Thermatic® Fan & EWP® Switch (#0500)

Need the connector harness?

Purchase the M14 x 1.5 Thermal Sensor Upgrade Kit (#0464), which includes the sensor, connector cable and crush washer.


Specifications

Specification Details
Part Number 18420
Thread Size M14 x 1.5
Thread Type Parallel Thread
Sealing Method Crush Washer
Sensor Type Coolant Temperature Sensor
Installation Direct into M14 x 1.5 coolant port

Kit Contents

  • 1 × M14 x 1.5 Thermal Sensor
  • 1 × Crush Washer

Why Use a Coolant Temperature Sensor?

Unlike radiator fin probes that measure the temperature of air passing through the radiator, the Davies Craig M14 x 1.5 Thermal Sensor measures the actual coolant temperature inside the cooling system. This provides:

  • More precise fan activation
  • Improved cooling efficiency
  • Better engine temperature management
  • Faster response to temperature changes
  • Cleaner OEM-style installation

Typical Applications

Suitable for vehicles with an existing M14 x 1.5 coolant sensor port, including:

  • Performance vehicles
  • Street cars
  • 4WDs
  • Motorsport vehicles
  • Engine conversions
  • Custom cooling systems
  • Marine applications

Why Choose Davies Craig?

For over 50 years, Davies Craig has been a global leader in automotive cooling technology. Genuine Davies Craig sensors are engineered to provide dependable temperature monitoring and seamless integration with Davies Craig electric cooling products, ensuring reliable performance in demanding conditions.

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