EGT Thermocouple Probe Wiring and Setup
Attached are settings and wiring connections for Exhaust Gas Temperature senders. This guide can be used to help if you are experiencing problems or if you suspect your EGTs are reading incorrectly.
Remember to follow these 3 Steps first when troubleshooting senders.
EGT Troubleshooting Steps:
- Are senders wired with the correct polarity? Read this article
- Are senders in the correct channels? Read this article
- Is the correct Type thermocouple selected? Read this article
- A practical test you can do to determine if your EGT is reading correctly. Read this article
There are 2 common types of EGT Probe, Clamp-type probes for most engines, including Lycoming, and M8 x 1 threaded probes for Rotax engines.
Instructions for EGT Clamp Probes for Lycoming Engines:
- Install the EGTs between 2 and 4 inches down the exhaust pipes (based on engine manufacturer recommendations)
- Make sure EGTs do not protrude into cowling
- Use ‘EGT, Small Clamps’ on most installations. When pipes are greater than 1 ½” diameter, then ‘EGT, Large Clamps’ are recommended
- Drill a ¼” hole for clamp-type probes
- Use Thermocouple Channels TC1 through TC4 if you have a 4-cyl engine. Use TC1 through TC6 if you have a 6-cyl engine.
- Remember that all EGTs are type K thermocouples and that Yellow is Positive and Red is Negative
- Extend EGT leads if necessary with type-K extension wire (Instructions Here)
Wiring Instructions for Type-K Thermocouples:
Note: counter-intuitive colors
Since just about all aviation EGTs (including MGL Avionics) are type-K thermocouples, you normally just need to select the number of channels in setup.
Enigma/Voyager/Odyssey and iEFIS:
Infinity or Velocity Single:
CHT Thermocouple Probe Wiring and Setup
Attached are settings and wiring connections for Cylinder Head Temperature senders. This guide can be used to help if you are experiencing problems or if you suspect your CHTs are reading incorrectly. Remember to follow these 3 Steps first when ...
EGT Thermocouple Probe Type?
Most Aviation EGT probes are type-K thermocouples (because the temperature range of type-J thermocouples is not has high as is required for EGT). All MGL Avionics EGTprobes are TYPE-K. Note that the polarity of Type-K Thermocouples is not intuitive, ...
Thermocouple Order - which goes first EGT or CHT?
In all MGL Avionics instruments (except iEFIS), including Velocity Singles and Infinity Singles and all RDAC connections for MGL Avionics Enigma, Odyssey and Voyager EFISs, the following rules apply regarding the order in which EGT and CHT probes are ...
Can I extend CHT and EGT Thermocouple probes?
Should you wish to increase the length of the leads of your CHT or EGT probes, this can be done. Our type-K EGTs and CHTs probes should be extended with type-K extension wire directly to the RDAC, or if the RDAC is mounted outside the engine ...
AeroVee Engine Sensor Setup
AeroVee (Sonex) Sensor Settings AeroVee uses the following sensors: CHT: Type-K or Type-J Thermocouple (Specified at ordering) EGT: Type-K Thermocouple Oil Pressure: VDO 5-bar sensor 360-001 Oil Temperature: VDO 150-degree Celsius sensor 323-055 ...