Rhomap was spun-off from Durham University in 2011 to develop manufacture-to-order scientific instrumentation for high precision magneto-transport measurement systems. Rhomap's instruments target new materials and next generation semiconductors, photovoltaics, spintronics and ferromagnetic systems.
Rhomap's web site seems to be empty so it's not clear whether the company is still active.
Rhomap established to develop measurement systems for Spintronics and other applications
Durham University spun-off a new company called Rhomap to develop manufacture-to-order scientific instrumentation for high precision magneto-transport measurement systems. Rhomap's instruments targets new materials and next generation semiconductors, photovoltaics, spintronics and ferromagnetic systems.

The new Ohmpoint Measurement System is a flexible research tool that offers a range of software selectable sample connection probe geometries in one system. The instrument allows users to measure resistance in two or four point geometry, sheet resistance and magneto-transport behavior, including Hall effect and magnetoresistance. The flexibility of the system also enables the user to easily select between individual measurements and batch scanning of multiple samples.