Membrane Interface Probe (MIP) is a rapid screening tool for locating volatile organic compounds in the subsurface. MIP is a powerful logging device able to detect volatile organic compounds and record semiquantitative data in a continuous depth profile. MIP collects real-time, vertically continuous data on the distribution of VOCs as well as an electrical conductance (EC) log that is indicative of the crossed lithology. The in-situ chemical instrumentation is based on a probe that is connected to laboratory instrumentation by a capillary tube system and control cable.

The MIP-sytem was developed by Geoprobe USA and is patented world-wide. Since its introduction it is permanantly advanced and optimated.

geo-log offers MIP-technology of the latest standard. A recent development is a heated trunk-line between probe and gas detector, that allows a controlled heating up to 100°C. This is of particular interest for difficult to detect, low-volatile substances like e.g. tetrachloethene and diesel fuel.

Thanks to high-performance probe machines and enforced probe rods, geo-log offers MIP-investigation down to 50 m depth. The realisation of such depths requires a heated trunk line and a combined application of direct-push and rotary drilling.