The 122 Interface Meter measures product level and thickness accurately to 1/100 ft or 1 millimeter. It measures both floating and sinking hydrocarbon, non-aqueous product layers (LNAPL and DNAPL). The 122 is certified safe for use in explosive environments by the Canadian Standards Association (CSA - Class 1, groups C & D).

A steady tone and light indicate product and intermittent signals indicate water. Readings are taken from accurate Solinst flat tape up to 1000 ft (300 m). The Interface Meter is rugged, field durable and is easy-to-use. A carrying bag and tape guide are included.