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allsun Ultrasonic Leakage Detector Transmitter Finder 40KHz Water Dust Leak Monitor with LED Indication

4.8 (11) Write Review
Free shipping on orders over $29.99

$47.99

$ 20 .99 $20.99

In Stock

About this item

  • The Ultrasonic Leakage Detector can quick and simple location ultrasonic caused by air, liquid, dust leak. It’s able to detect leakage on tyre and also detects ultrasound as well. Use ergonomics, it is easy and fast for user to use with simple key operation mode and comfortable hand feeling.
  • The Air Leakage Detector is a very useful device to locate leak either under pressure or vacuum. The head phone produced a very distinct sound on the area where the leak is coming from. Using the transmitter, it will transmit sound from an enclosed area and can pinpoint the gaps or opening on the roof using the receiver.
  • The Ultrasonic Leak Finder can detect the air or liquid leakage by detecting ultrasonic caused by high pressor leakage.It can trace the detector around outside of the screen, windows and door seals to locate the leak. It uses the advanced ultrasonic sensing technique and features small size, light weight, reliable detection, easy use and utility.
  • Ultrasonic Air Lak Detector locating leak either under pressure or vacuum. The head phone produced a very distinct sound on the area where the leak is coming from. Using the transmitter, it will transmit sound from an enclosed area and can pinpoint the gaps or opening on the roof using the receiver.
  • The Gas Ultrasonic Leakage Detector, Simple and easy to use. When all have been sealed, it can locate the leak, you can able to use it to find a water leak in a truck, finding air leaks on your vehicles, finding leaks around doors and windows. Also you use the listening device outside the car.


Product Description

Some common questions about this product

EM282 QA 1
EM282 QA2
EM282 QA3

EM282-R

EM282-R is designed to locate leaks in pressure and vacuum systems. It can be used to detect and locate the source of the ultrasonic emission generated by gas or liquid flowing through a small restrictive opening. It uses the advanced ultrasonic sensing technique and features small size, light weight, reliable detection, easy use and utility. In conjunction with EM282-T Ultrasonic Transmitter, EM282-R can also be used for tightness check in sealed compartments such as container, tank, car, etc.

EM282-T

EM282-T can send out ultrasonic sound of 40kHz and is designed to be used in conjunction with EM282-R.

Non-pressurized vessels or containers cannot generate ultrasonic sounds. Tightness check for them (also cars, ships, etc.) can be performed by using EM282-R and EM282-T together. To do it, turn on EM282-T and place it inside the compartment to be checked. The ultrasonic sound emitted by EM282-T will pass through orifice or faulty seal and will be quickly located by EM282-R.

Principle

Turbulence created by gas or air forced through a small orifice generates ultrasonic sound. Ultrasonic sound occur when the atmosphere leaks into a vacuum vessel or when a pressure vessel leaks to the outside atmosphere. Ultrasonic sound's frequency is related to the size of the orifice which ultrasonic sound passes through, but usually the frequency is about 40kHz. Ultrasonic sound is very directional, this directionality is used to pinpoint the origin of the ultrasonic sound, the leak point.

Operation Mode

EM282-R can be used in one the two modes, one is Active Mode, another is Passive Mode.

In the Passive Mode, only EM282-R is used.

Passive Mode can be detect and locate leaks in pressure and vacuum systems. These leaks can generate ultrasonic emission which can be detected by EM282-R.

In the areas where leaking gases are not pressurized or not sufficiently pressurized, there is no ultrasonic sound for detection. In this situation, you can use Active Mode to detect and locate leak. In Active Mode, EM282-R is used in conjuction with EM282-T. EM282-T is an ultrasonic transmitter which can send out ultrasonic sound. By placing EM282-T in sealed area, and scanning the extorior of this area with EM282-R, the ultrasonic sound escaping from the sealed area will be detected. A flaw in the seal can quickly and accurately be located and pinpointed.

300*300

300*300

EM282 300

21

20

19

18

3

Set Includes:

1 x Receiver

1 x Transmitter

1 x Earphone

1 x Pouch

2 x 6F22,9V battery

1 x English Instruction Manual


MacGyverJr
2025-08-02 10:43:56
For a tool that doesn’t get a lot of use this one can really save the day. I had a vacuum leak on my car and I couldn’t locate it over all the other engine noise. This tool disregarded the other engine noise and alerted once I got close to the source of the leak. It recognizes the frequency noise at the source of the leak.
navalsoldier
2025-07-27 16:17:23
you get what you pay for. not the best but for the price i believe it is decent
George
2025-07-13 11:24:15
Received it today, and I played around with it. The transmitter works only 50% of the time when I switch it on. The LED power indicator is on but no ultrasonic sound comes out. I have to turn it off and on a few times before it kicks in........Quality control is definitely an issue with this product. If the transmitter is not reliable, then there's no reason to trust the receiver. You get what you pay for, i suppose.
Phil Livengood
2025-07-02 11:27:27
I had an internal leak in a brand new transmission that was allowing oil into the flywheel housing. Soap could not detect it when 5 psi was applied to the transmission housing. I got the tool quickly and started testing. I found a pin hole in the casting of a bearing housing. This was a huge help!
Timothy Salomon
2025-05-17 10:58:52
Used for refrigerant/ piping leaks, this device is not sensitive enough.Worthless for what I bought it for.The Accutrak leak detector is worth the $400 extra. Don't waste your time with this toy.
Michael Scruggs
2025-05-10 19:36:02
Learned about this item on a Maple Syrup forum. Ever since a local distributor stopped selling a similar united I have been looking for an option. This was recommended on a Maple discussion group. Used today to check for leaks on a vacuum pump area and two releasers. Found a cracked fitting on the vacuum pump. I wish it had a more visual indicator (ramp of lights vs a single light when a good leak is detected). I would recommend it.
Darian O. Cork
2025-03-22 14:16:12
I use this leak detector for detecting initial leaks on carbon fiber vacuum bags for resin infusion. It easily detects some of the initial bag leaks making it much easier to get the bags under full vacuum seal. It doesn't detect the smaller pinhole leaks very well as they do not have enough volume of air movement. Overall, this tool has speed up bag time for several of our projects. The cost savings are ridiculous considering the low initial cost.
Clueless
2025-02-12 15:17:57
This reasonably priced device will detect leaks, but in my experience it is not sensitive enough. I tried it on a very slow leak but was not able to get any signal. That leak was easily detected with soapy water, and even a much smaller leak would have been revealed that way. Where this device did work was with much larger leaks. However, those leaks were of a size that one could hear them in a quiet room by putting an ear up close. It is possible that the device would be capable of taking it down another level, but it is not adequate for the very slow leaks where one needs the most help to detect. For the larger leaks, say in a compressed air system, the device offers the benefit of having a directional microphone that can be pointed at a suspect joint or fitting and that is a good capability. It also means that one might need to rotate it all around the joint to not miss the leak. In summary, the low tech soap bubble method is far cheaper and much more sensitive, but this device might be useful for larger leaks in certain applications. It is no match for the more expensive dedicated instruments optimized for HVAC applications.
Mechanic Steve
2025-02-11 11:05:25
Can not believe how well this unit works considering the price
Marc C
2025-02-07 10:03:19
If you're buying this ultrasonic leak detector to find a pool leak, save your money. It doesn't work for that purpose.
Ginette Ouimet
2025-01-18 18:26:47
J'ai voulu tester une fuite d'air sur mon pare-brise et l'appareil ne l'a pas détecté malgré le fait qu'il y a effectivement une fuite.