Sensors

Delphi Fluid Temperature Sensors are continuous function devices that change resistance inversely to temperature. They measure the temperature of oil, fuel, water or engine coolant and provide a signal to the powertrain control module. These brass sensors consist of four major components:

• Brass shell
• Thermal grease
• Gasket
• Insert molded connector

The shell uses customized thread and hex sizes per application requirements and the connector contains a Negative Temperature Coefficient (NTC) thermistor with a crimpless conductive path.

Benefits

• Simple design with few components for cost-effective, lightweight package
• Design flexibility with customized mounting features, sealing options, connection systems, and resistance output
• Crimpless conductive path eliminates an electrical interface
• 100 percent resistance calibration verification helps ensure quality and reliability
• Packaging variations include a dual coolant (coolant and gauge sensors), a right angle connection, and a reduced size for small engine applications

Specifications for Fluid Temperature Sensor 

 Thermal and Electrical Properties

• Typical voltage supply: 5 VDC
• Operating temperature: -40°C to 135°C
• Resistance at 25°C: 2795 ohms
• Thermal time constant: 15-24 sec. in silicone oil
• Accuracy (±°C) -40°C to 100°C: ±0.56 to 0.77°C
• Accuracy (±°C) 100°C to 150°C: ±0.77 to 1.24°C
   

Mechanical Characteristics

• Sensor housing material: Brass
• Sensor connector material: PBT 30% GF
• Thread size: M12 x 1.5; Hex size: 18.90 mm (3⁄4 in.)
• Thread size: 3⁄8 in. – 18 NPTF; Hex size: 18.90 mm (3⁄4 in.)
• Thread size: 1⁄2 in. – 14 PTF; Hex size: 22.22 mm (7⁄8 in.)
• Sealing washer (copper; for metric threads only): P⁄N 12146937
• Suggested mating connector assembly: P⁄N 15336004
• Installation torque: 20 Nm, dynamic
• Overall weight: 23.2 to 62.2 grams

Fluid Temperature Sensor Diagram

Specifications for Downsized Fluid Temperature Sensor

 Thermal and Electrical Properties

• Typical voltage supply: 5 VDC
• Connector operating temperature: -40°C to 125°C
• Sensor tip operating temperature: -40°C to 150°C (180°C peak)
• Resistance at 25°C: 10,000 ohms
• Thermal time constant: < 15 sec. in silicone oil
• Accuracy (±°C) -40°C to 150°C: ±1.0°C

Mechanical Characteristics

• Sensor housing material: Brass or stainless steel
• Sensor connector material: PBT 30% GF
• Thread size: M10 x 1.5; Hex size: 15.87 mm (5⁄8 in.)
• Thread size: 1⁄8 in. – 27 NPTF; Hex size: 15.87 mm (5⁄8 in.)
• Sealing: O-ring, dryseal pipe thread
• Suggested mating connector assembly: AMP 1-967644-1
• Installation torque: 12 ±2 Nm
• Overall weight: 15.3 to 16.3 grams

Downsized Fluid Temperature Sensor Diagram

Note: All measurements are in millimeters.