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Thread: Underground Leak Detection

  1. #1

    Question Underground Leak Detection

    I have a client that is requiring to monitor hot water that has burst from pipes underground. He said it would be approx. 2m under concrete and wants to know if it is possible.
    It can certainly be done, but the ability will depend upon pipe burial depth (and 2 meters is quite deep), the delta T of the liquid to the earth temperature (hot water is good), the amount of loss, the style of pipe, and the ground covering at the surface (ie grass, concrete, sand etc), plus the moisture content of the ground.

    As you can see there are a number of variables, so detection can be a bit hit and miss, especially with entry level equipment. You would need extra good thermal sensitivity, 60mk or less.

    The best entry level unit that would give you the opportunity to detect this leak would be the Testo 875-1i. No other entry level camera has this level of sensitivity which is just 0.05 deg C or 50mk. http://www.ipi-online.com.au/testo-875-1i

    One of the best instruments for the task would be the testo 885, again with a class leading sensitivity of 30mk of 0.03 deg C. http://www.ipi-online.com.au/testo-8...imaging-camera

    Another option for leak detection would be structure borne ultrasound. This would require a turbulent leak with sufficient pressure differential. If the leak were say a slow dribble, it would not detect it. http://www.ipi-online.com.au/ultraprobe-9000

    Ultrasound is very effective on turbulent leaks.

    These are two of the best technologies you can use and they are most often used hand in hand to detect leaks.

  2. #2
    Junior Member
    Join Date
    Aug 2014
    Location
    Huntsville, Alabama
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    After reading the post, it made me wonder if using the Thermal I could locate moles in my back yard. I'll find out. No diss meant.

  3. #3
    Junior Member
    Join Date
    Aug 2014
    Location
    Huntsville, Alabama
    Posts
    10
    Quote Originally Posted by Hilary & Shirley View Post
    After reading the post, it made me wonder if using the Thermal I could locate moles in my back yard. I'll find out. No diss meant.
    Went out in to the back yard with my camera looking for the little varmints. I figured with them being warm blooded and the ground being cold I would have a chance. They are only a couple of inches deep, but with them sleeping the idea was some energy would be released up and I would have a chance. No such luck. The humidity and the cold in the leaves and grass made the entire back yard look like it had the measles in the camera. I going to try again when the conditions are different. I'll let you know more, seems like it would work...??

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