[George]

I have used this for more than 20 years and it has done well, both as a means of detecting leaks in the air system, but to find door gasket leaks using the noise generator I also have.

https://www.amazon.com/Amprobe-ULD-300-Ultrasonic-Leak-Detector/dp/B000NI2BD8

Do not get your hopes up and think this is the answer to all leak detection issues. It is only one of the ways and no one single way works all the time.

[Ronald]

Hey Jon! I’m thinking about getting the leak detector that you put the link

Amprobe ULD-300 Ultrasonic Leak Detector

, how does it work? How close does the probe needs to be to the leak? Thanks’

[Archived]

It has a headset you need to wear. It has adjustments so you can dial out some ambient noise while still being able to detect the noise of a leak. It also has some LED lights to give a visual on noise detected.

There is a learning curve, most of which is in determining the best volume and sensitivity for isolating the sounds of a leak.

The device itself has a tube you insert on the end and that tube is what you want to move near and around potential leaks. Generally a leak in a valve connection begins to be detected by a sound, which to me is like a hissing sound. As the end of the tube nears the leak the sound becomes more distinct. When the tube sensing sound is pointing at the leak and it is close to the leak the sound will be at its greatest level and the LED lights will all be lit.

Having said that however there is a degree of practice required in adjusting the volume and sensitivity levels. A leak at a Norgren fitting is likely to be pronounced, but a leak past the O rings on the spool internally may be muted, and a pin hole leak in a rubber air bag will be undetectable because the device has limitations with holes in rubber being one of them. For me my primary tool for leak detection is soapy water.

I have made extensive use of my Amprobe, but it is only a single leak detection tool. My ears, soapy water, a stethoscope and an air line connection with a gauge are the other tools, no single one being better than the others because they all have their strengths and limitations.

[John]

Is there a stethoscope that works for leaks?

[Archived]

I have one–with head phone(now broken wire ) seems the hard wire got tangled in body part. Using ear buds now. Plugs in same hole. Weather can reveal air leaks that don’t show up in warmer weather. leak free coach–for me never! But I keep on trying..They are a good tool.

[Chuck & Katrina]

Back when Sears was Sears I bought a stethoscope for about $5. It seemed designed to hear lifter noise because in the end of the plastic tubes was a 12″ aluminum rod that you touched what you were listening to.

But the rod unthreaded and what you had was a stethoscope with a small funnel on the end that could be pointed towards noise.

https://www.harborfreight.com/Mechanics-Stethoscope-63691.html

Big leaks you can hear with your ears. Not so big leaks can be picked up with the stethoscope, but more importantly you can locate the source of noise that bounces around and that fools your ears as to the source.

---

2000 Featherlite H3-45

2024 Jeep Grand Cherokee

Leesburg, FL