Can I Extend the Wiring on My Brake Temperature Sensor?

Yes, you can extend the wiring on your brake temperature sensors—including our RBTC and BPTC thermocouple models—as long as you use the proper Type K thermocouple extension wire and follow best practices for thermocouple installations.

Why Proper Extension Wire Matters

Brake temperature sensors like the RBTC and BPTC use Type K thermocouple technology, which generates a small voltage based on the temperature difference between two dissimilar metals (Chromel and Alumel). To preserve the accuracy of that voltage signal all the way to your ECU, data logger, or display, the extension wire must be made of the same materials.

Never use copper or generic wire—doing so will introduce additional thermoelectric junctions, resulting in incorrect temperature readings.

Extension Best Practices for Brake Temp Sensors

Use Type K Thermocouple Extension Wire
 

• Choose wire with Type K thermocouple-grade conductors
   
• Match insulation to your environment (e.g., fiberglass or FEP for high-temp areas)

Maintain Correct Polarity
 

• Type K wire is polarity-sensitive:
   
  • Yellow = Positive (Chromel)
     
  • Red = Negative (Alumel)
     
• Always connect yellow to yellow and red to red

Use Thermocouple-Compatible Connectors
 

• If you add connectors, ensure they are Type K compatible
   
• Mixing connector types can distort readings

Protect Against Heat and Vibration
 

• Secure the wiring away from moving parts and excessive heat zones
   
• Use heat shielding or sleeving in areas exposed to radiant heat or abrasion

Minimize Electrical Noise
 

• Keep thermocouple wires separate from ignition systems or high-current cables
   
• Shielded cable can be used to improve noise immunity in sensitive applications
   

What If You Don’t Use Proper Wire?
 

• Inaccurate or drifting readings
   
• Faulty data logs and diagnostic errors
   
• Potential safety risks in racing or performance applications

Summary
 

• Yes, brake temperature sensor wires can be extended.
   
• Use only Type K thermocouple extension wire with correct polarity.
   
• Choose proper insulation and connectors for high-heat, high-vibration environments.
   
• Avoid routing near electrical noise sources to maintain signal integrity.
   

Need help choosing the right extension wire or thermocouple connectors?
Contact our technical team—we’re here to help you get the most accurate and reliable data from your brake temp monitoring setup.