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Internet # 315197689

Model # R9100

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$119.00
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  • Features alarm and LED to point leaks
  • Includes earphone jacks for loud surroundings
  • Features transmitter generating 40 kHz signal
  • View More Details

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Product Details

About This Product

Identifies and pinpoints leaks generated by pressure, vacuum, water, gas or air. This ultra-sonic leak detector converts ultra-sound signals produced by industrial machinery into easily recognizable audible sounds for a user to evaluate the condition of individual components. The R9100 includes a transmitter that generates a 40 kHz signal to help pinpoint leaks and headphones for use in loud environments.

Highlights

  • Locates leaks generated by pressure, vacuum, water, gas or air
  • Visible (LED) and audible (ticking) alarms assist in pinpointing leaks
  • Earphone jack for loud environments (earphones included)
  • User adjustable sensitivity wheel
  • Ultra-sonic transmitter generates a 40 kHz signal
  • Includes: ultra-sonic leak detector, transmitter, headphones, carrying case, and batteries
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Product Information

Internet # 315197689

Model # R9100

Specifications

Dimensions

Product Depth (in.)

2 in

Product Width (in.)

6 in

Details

Features

No Additional Features

Included

Case

Power Source

Battery Operated

Returnable

90-Day

Test Meter Type

Specialty Meter/Tester

Warranty / Certifications

Certifications and Listings

CE Certified, ROHS

Manufacturer Warranty

1 Year

Questions & Answers

Will it detect where the water pipe is leaking under 31/2 inches of concrete?
BySep 5, 2026
1 Answer | 
Answer This Question

Hello James, the REED R9100 is not designed to detect leaks that are buried under concrete.

By|Sep 8, 2026


    Will it detect radio signals/jamming
    ByAug 18, 2026
    1 Answer | 
    Answer This Question

    Hello, the R9100 does not detect radio signals or jamming signals.

    By|Aug 19, 2026


      Will this tool help me find an air leak on a semi truck
      ByMar 4, 2026
      1 Answer | 
      Answer This Question

      This device can identify and pinpoint air leaks. However, this device requires the leak to be directly exposed (on the surface). If the leak is internal and hiding beneath an outer layer of material, it will not be detected with this device.

      By|Mar 5, 2026


        Will it find a air leak underground
        ByJan 30, 2026
        1 Answer | 
        Answer This Question

        Hello Stanley, the R9100 will not detect leaks from underground.

        By|Feb 2, 2026


          How do I use it to locate underground water leak
          BySep 15, 2025
          1 Answer | 
          Answer This Question

          Hello Jona, the R9100 Ultra-Sonic Leak Detector is not suitable for detecting leaks buried underground and will not be adequate for your application.

          By|Sep 16, 2025


            If I either pull a vacuum or put air pressure into the copper refrigerant lines for an HVAC system, would this device be capable of detecting very small/pinhole leaks that may be in the brazed joints of the tubing?
            BySep 16, 2024
            1 Answer | 
            Answer This Question

            Hello Daniel, the R9100 should be able to detect the leak by pressuring the pipes with O2 (Air). It's important to start by setting the detector’s sensitivity to the highest level at the beginning of the test. If the ultrasonic sound detected is too intense, it may be impossible to pinpoint the leak due to a high "ticking tone". In such cases, decrease the sensitivity. Ultrasonic sound attenuates quickly over distance, so move the detector as close as possible to the suspected leak. Remember to lower the sensitivity if needed. Best regards.

            By|Aug 21, 2026

              (2)

              Can I use this to find air leaks around windows by placing the transmitter indoors and using the detector outside?
              BySep 8, 2024
              1 Answer | 
              Answer This Question

              Hello Gjude, Yes, you can use the REED R9100 Ultrasonic Leak Detector to locate air leaks around windows, but its effectiveness will depend on how the sound waves behave in your environment. Typically, this device works by converting ultrasonic sounds—such as those created by air escaping through small cracks—into audible sounds, helping you pinpoint the leak. The transmitter generates a 40 kHz ultrasonic signal, and the detector can pick it up to help you find leaks indoors or outdoors. In your case, placing the transmitter indoors and using the detector outside might work, but be aware that the signal might not travel well through thick walls or materials. For best results, testing it directly around the edges of windows where air might escape could give you a more accurate detection​

              By|Sep 9, 2024


                Will this tool detect a leak in a underground pvc main water line from the meter to the house?
                ByFeb 14, 2024
                1 Answer | 
                Answer This Question

                Hello Tommy, please note that this detector will not be able to detect leaks underground.

                By|Jan 3, 2025

                  (2)

                  Viewing 1-8 of 14

                  Customer Reviews

                  5 out of 5

                  • 5 out of 2 reviews
                  • 100% recommend this product
                  Filter by:
                  Showing 1-2 of 2 reviews
                  Leaky, Leaky, Fixie, Fixie
                  This ultrasound leak detector definitely works but you cannot just use any set of headphones it needs a special headphone to do the job. I work on hospital ventilators and those things are loud and blow air on you so it is impossible to spot a leak by just using your ears and or feeling around and soap bubbles does work but you need to know where the item is, and you run the risk of contamination of the PC boards. Its range is not very far so you really need to be close to the unit to hear the ultrasound. It is lighter and most models and it is lightly durability duty. Which means you need to take care of the instrument. it is not made to be tossed around. It is sensitive to sound, but you need to be within 1 foot away from the leak to start hearing the clicking. The Frequency is good, but it is made to be up close. It is made for small machines or area. If you are looking for better distance like in a building, then you will need to have the more expensive models. If you are working on something mechanical in a small known machinery about 2 feet x 2 feet area you can like a ventilator, or a water pump then yes it will work well. It is also great for sensing vacuumed chambers like tool sterilization. I use this in hospital setting. You may find it in other uses too.
                  by
                    • Recommended
                    Worked as depicted. Picked up air leaks that I could hear or spray.
                    by
                    • Verified Purchase
                    Showing 1-2 of 2 reviews