1/4″ Open Tip Thermocouple Length: 1.64m (64.5″)

High-Fidelity Thermal Data Acquisition: 1/4″ Open Tip Thermocouple (1.64m)

Accurate thermal management is the cornerstone of high-performance engine calibration. The 1.64m (64.5″) 1/4″ Open Tip Thermocouple serves as a critical sensory organ for your engine management system, delivering the fast-response temperature data necessary to safely extract maximum power. Engineered for the harsh environment of internal combustion, this probe utilizes the Seebeck effect through a high-quality Type K junction to provide reliable readings from ambient up to extreme exhaust gas temperatures. Whether you are monitoring turbine inlet temperatures on a diesel sled puller or balancing cylinders on a high-revving time attack car, this sensor provides the empirical truth required to tune with confidence.

The Science of Open-Tip Response

Speed is critical in EGT monitoring. A standard closed-tip sensor insulates the measuring junction, dampening the signal and smoothing out rapid temperature fluctuations. While this protects the sensor, it hides the transient spikes that indicate the onset of knock or lean conditions. This Open Tip sensor exposes the bimetallic junction directly to the gas flow. By minimizing the thermal mass at the sensing point, the time constant is drastically reduced. This allows your data logger to capture the true peak temperature during a gear shift or rapid throttle transient, rather than a lagged average. This fidelity is essential for setting up advanced safety parameters in modern ECUs, such as EGT-based boost cuts or individual cylinder fuel trims.

Optimized for Complex Installs

The 1.64-meter (64.5-inch) lead length is strategically chosen for applications requiring significant reach without the signal degradation associated with aftermarket splices or extensions. It is ideal for routing from a manifold collector to a firewall-mounted thermocouple amplifier or a dashboard integrated data display.

• Direct Feedback: Provides instant verification of air/fuel ratio changes.
• Diagnostic Utility: Helps identify blocked catalytic converters, failing injectors, or ignition misfires by comparing cylinder temperatures.
• Robust Construction: Designed to withstand the high-vibration environment of a race engine bay.

Vehicle Application Guide

This sensor is universal in fitment but specific in application. It is the industry standard for Exhaust Gas Temperature (EGT) measurement in turbocharged and high-compression naturally aspirated engines. It requires a compatible thermocouple amplifier (TCA) to convert the millivolt signal for ECU processing.

Package Contents

Sold as a single unit. Includes the thermocouple probe with 1.64m cabling and a Mini K Type connector. Fitting hardware is not included. A 1/4″ compression fitting is recommended for installation to ensure a leak-free seal and adjustable immersion depth.