The 122 Interface Meter measures water and product level and thickness, accurately to 1/200 ft or 1.0 millimeter. It measures floating and sinking hydrocarbon, non-aqueous product layers (LNAPL and DNAPL), using a 5/8" (16 mm) diameter pressure-proof probe. The 122 is certified intrinsically safe, and is ATEX certified.
Readings are taken from accurate laser marked flat tape up to 1000 ft (300 m). The tape is very easy to clean. The 122 is rugged and simple-to-use. Carrying case and tape guide are included.