MGL Avionics K-Type Thermocouple Probe

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Part# 11-05567
MFR Model# EGT-M8


Top quality, high temperature EGT probe. This unit can be used up to 1200 degrees C (2000 degrees F) short-term and 1100 degrees C indefinite. Made from 310 grade stainless steel the probe will remain firm at high temperatures making this an excellent choice for turbo charged high performance engines. The bolt has a 8x1 thread (Metric fine thread) as used by Rotax for their exhaust manifolds. The bolt is made from high tensile steel and is compatible with mild steel exhaust systems from a temperature expansion rate point of view. The probe is fitted with a 3 ft, stainless steel armoured, mineral fibre insulated cable. The probe is a "K-type" thermocouple.

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Works just fine as replacement. Does have a shorter lead and may need an extender.

Hans J Verified Purchase


June 8, 2022

I tried 2 less expensive couplers that didnt work or fit. This fit and worked properly in my 582 gray head.

Steven B Verified Purchase


April 13, 2022


Eric G Verified Purchase


May 27, 2021

Rotax 912 ULS with FlyDat system, works as advertised no issues so far, easy install

Alan R
October 17, 2019

Works fine. Least expensive option for a Rotax 503 on my challenger

Jeremy D
December 31, 2018

Installed on my challenger 2 - 503 Rotax. Works great and appears to be the least expensive solution out there. 8mm x1 standard thread for 503 exhaust manifold.

Jeremy D
October 26, 2018

Beware: the wire is short. Maybe my plane is longer than standard. The probe is as described. Excellent avionics support from Aircraftspuce US. As directed you can extend it with JPI Type K thermocouple wire (Part # 10-18600).

January 17, 2018

Whats to review, its a thermocouple, EGT sensor.

September 22, 2017

Working as intended.

August 14, 2020


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Does the bolt on the MGL K-Type Thermocouple turn independent of the probe? IE do the wires turn when screwing the probe into the muffler.

It does not turn independent of the probe.

Q: Will these work with the westach dual egt gauge?

Westach recommends only using westach senders with a westach gauge.

Q: Will these work with a Grand Rapids EIS

We do not recommend mixing manufacturers for these types of installations as we cannot guarantee function. Please view the Grand rapids EGT probes.

Q: Can the leads be shortened without impacting performance?

The manufacturer advises that the length not be shortened on these.

Q: what is the length of the probe from the tip to under the bolt head, is it 32mm or 36mm?

32 mm.

Q: Is this a grounded or ungrounded TC?

This is ungrounded.

Q: What is the length of this MGL K-type thermocouple probe?

The probe from tip to under the head is 32mm, the cable is 3 feet.

Q: What is the of the threaded area?

The thread is metric, m8x1.

Q: What is the length of the threaded portion of the MGL Avionics K-type probe?

Per Vendor: "The threaded portion is about .446in or 11.3mm in length."

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