31 inches long Reads moisture content of 17% For use in urine detection and moisture mapping Light flashes and beep sounds when moisture detected The Hydro Shark is a heavy-duty moisture sensor that detects moisture in carpet, drywall, and wood. Great for urine detection or for moisture mapping at the beginning of any water damage job. This heavy-duty moisture sensor is so tough, engineers repeatedly ran it over with an SUV and failed to make a dent. The competition? Their sensor flattened faster than a beer can! A tough exterior is only the beginning of the story: the moment the Shark detects moisture in carpet, drywall and wood (even if it is trapped in urine), a bio-hazard light flashes and beep sounds. This state-of-the-art tool is crafted of stainless steel with a no-slip rubber grip and convenient battery portal.