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Anyone used a magnehelic leak tester from Nuotools?

Author: m1964
Date: 2025-10-21 21:20

I see the magnehelic machine for $400 (USD) and wonder how it compares to the ones from JLSmith or MusicMedic, that cost about $600.
This is the link: https://welnuo.com/products/wind-instrument-mag-machine-air-tightness-testing-machine

Thanks

Post Edited (2025-10-22 05:34)

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Re: Anyone used a magnehelic leak tester from Nuotools?

Author: clarnibass
Date: 2025-10-22 08:31

I haven't tried it, but I have some tools from them and they are good. One of the tools had a defect but they sent me a replacement (without even needing to return anything). I know other who had tools from them and they were good too.
Not sure if this helps but maybe...

Individual choice but I prefer the magnehelic machines that are taller rather than wider, taking less table/shelf space.

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Re: Anyone used a magnehelic leak tester from Nuotools?

Author: m1964
Date: 2025-10-26 06:09

Dear Clarnibass,

Thanks for replying to me.
I am looking at that machine because it's $200 cheaper than the one from JLSmith or MusicMedic.
Not sure my clarinet fixing hobby justifies it...

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Re: Anyone used a magnehelic leak tester from Nuotools?

Author: clarnibass
Date: 2025-10-28 09:09

Maybe you'll find someone who bought that specific one.
Based on my overall experience with Nuotools I would trust them and buy from them again, but can't say anything definite.

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Re: Anyone used a magnehelic leak tester from Nuotools?

Author: Dan Shusta
Date: 2025-10-30 10:10

m1964,

<Not sure my clarinet fixing hobby justifies it...

Why not just build your own? 14 years ago I ran a very small home business called Simplicity Instruments in which I sold on that auction site my self- designed Magnehelic air leak detector. Tom Puwalski bought one of them. I only sold around 8 or 9 of them before I decided that the work involved, the shipping costs, and my business inexperience basically forced me to shut it all down.

Afterward, I decided to just put the schematic on this BB for anyone who was interested. My initial design was quite simplistic and an engineer clarinetist enhanced my original design greatly.

When I sold them they actually worked very well and were quite accurate.

Enclosed in the next post is the diagram of the meter schematic after the engineer clarinetist upgraded it.

Just thought you might be interested. It's actually very inexpensive to build.

Post Edited (2025-10-30 11:08)

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Re: Anyone used a magnehelic leak tester from Nuotools?

Author: Dan Shusta
Date: 2025-10-30 10:34
Attachment: Regulated output diagram.jpg (30k)

Schematic of upgraded Magnehelic air leak detector.

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Re: Anyone used a magnehelic leak tester from Nuotools?

Author: m1964
Date: 2025-10-31 06:40

Dan,
Thanks a lot- I do not trust myself enough (I guess) to attempt building one.
Between finding parts and cabinet/case, and assembling it, buying one from Nuotools starts making sense (to me).

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