Speake & Co have been manufacturing and supplying their unique range of Magnetic Field FG Sensors designed by the late Dr Richard Noble, since 1995. The sensors themselves being augmented by a series of ASICS (Application Specific Integrated Circuits) to facilitate specific applications. e.g. gaussmeters, vehicle detectors, compasses, magnetometer kit and gradiometers kit. Speake & Co. FGM-3Sensors + SCL00X I.C. chips, PCBS & Component Kits for Magnetometer and Gradiometer projects.