The WESTACH 712-7DJK is a J-type Cylinder Head Temperature (CHT) sender designed for use with Westach non-TSO thermocouple engine monitoring systems. This probe utilizes a 1/8" NPT threaded installation with a 3/16" outside diameter sensing probe, making it suitable for aircraft piston engine cylinder head temperature monitoring applications.

The sender functions as a thermocouple-based temperature sensor that directly measures cylinder head operating temperatures and transmits data to compatible Westach CHT indicators and engine monitoring instruments. The “J” designation identifies compatibility with J-type thermocouple systems, while the “K” suffix in Westach nomenclature commonly denotes the connector/lead configuration used on their 712-series probes.

This model is commonly installed in experimental, ultralight, homebuilt, and light sport aircraft applications where compact threaded CHT sensing is required. The probe is part of the Westach 712 thermocouple series and is intended for non-TSO instrument systems.

Key features include:

J-type thermocouple CHT sender
1/8" NPT threaded installation
3/16" OD probe construction
Designed for cylinder head temperature monitoring
Compatible with Westach CHT gauges and EMS systems
Non-TSO aircraft instrumentation component
Thermocouple self-powered sensing operation
Commonly supplied with 4 ft lead wire
Compact threaded probe configuration
Suitable for experimental and light aircraft applications
High-temperature metal probe assembly
Made in USA construction