Solinst Model 122 Interface Meters are easy-to-use and give reliable, accurate measurements. A steady tone and light indicate LNAPL or DNAPL. Intermittent signals indicate water. Solinst flat-tape is available in lengths up to 1500 ft. or 450 m and is a pleasure to use.

The Mini 122 reel holds 65 ft. or 20 m of narrow flat tape on a convenient small reel. It offers long battery life with only one standard 9V battery, giving 300 hours or more of normal use before the battery needs changing.