Sm.OIL oil/water interface meter has the same functionality of our H.OIL oil/water interface meter. This compact unit only comes in one tape length (20m or 60’) on a small hand held frame designed for easy portability. The premium padded carry case comes included to protect your precision instrument from the elements. Measure the interface level between two liquids in the same tank, vessel, well or aquifer. The hydrocarbon resistant Kynar jacketed, high tensile steel core tape.