The WESTACH 713-7D is a J-type Cylinder Head Temperature (CHT) sender designed for aircraft engine monitoring systems using Westach thermocouple gauges. This bayonet-style probe features a 3/8"-24 threaded mounting configuration commonly used on Lycoming and compatible experimental or light aircraft engine installations.

The sender operates as a thermocouple-based temperature sensor that measures cylinder head temperature directly at the engine cylinder location, transmitting temperature data to compatible Westach CHT indicators and engine monitoring instruments.

This model belongs to the Westach 712/713 thermocouple family and is widely used in experimental, ultralight, gyroplane, and non-TSO aircraft applications. The “J Wire” configuration indicates compatibility with J-type thermocouple instrumentation systems.

Key features include:

J-type thermocouple CHT sender
3/8"-24 bayonet thread mounting
Designed for cylinder head temperature monitoring
Compatible with Westach CHT gauges and EMS systems
Thermocouple self-powered sensing design
Typically supplied with 4 ft lead wire
Bayonet probe construction for secure engine installation
Used in experimental and non-TSO aircraft systems
Compatible with Lycoming-style cylinder ports
Lightweight high-temperature probe assembly
Made in USA construction