EGT probes for Rotax 912ULS?

H. Paul Shuch is a Light Sport Repairman with Maintenance ratings for airplanes, gliders, weight shift control, and powered parachutes, as well as an independent Rotax Maintenance Technician at the Heavy Maintenance level. He holds a PhD in Air Transportation Engineering from the University of California, and serves as Director of Maintenance for AvSport of Lock Haven.

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proemer
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EGT probes for Rotax 912ULS?

Postby proemer » Sun Dec 01, 2019 11:00 am

I'm setting up a 4 probe EGT system for a Rotax 912ULS. The display electronics require UNGROUNDED probes, which are a little less common. Two possible types are:

1) Aerospace Logic http://www.aerospacelogic.com/index.php ... uct_id=200
or
2) Electronics International https://www.aircraftspruce.com/catalog/ ... kkey=22203

Any recommendations, suggestions or comments?

Thanks, Pete

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drseti
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Re: EGT probes for Rotax 912ULS?

Postby drseti » Sun Dec 01, 2019 11:33 am

Pete, all I've ever used are grounded probes. They work with all the analog gauges and glass panels I've ever seen. I'm curious what kind of display requires ungrounded.
The opinions posted are those of one CFI, and do not necessarily represent the FAA or its lawyers.
Prof H Paul Shuch
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proemer
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Re: EGT probes for Rotax 912ULS?

Postby proemer » Sun Dec 01, 2019 12:33 pm

I believe the EI and Aerospace Logic graphic displays want ungrounded probes. Also, the very easy to use thermocouple chips (MAX31850) need them.

Pete

Type47
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Re: EGT probes for Rotax 912ULS?

Postby Type47 » Sun Dec 01, 2019 1:43 pm

The Avmap Engibox for Rotax engines needs ungrounded probes.
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