The EV 1000 instrument is based on a simple and reliable electromagnetic concept. Two coils move the piston back and forth magnetically at a constant force. Proprietary circuitry analyzes the piston's two-way travel time to measure absolute viscosity. A built-in temperature detector (RTD) senses the actual temperature in the sampling chamber. The viscometer consists of a Cambridge Electromagnetic Viscometer SPSL 440, a set of six calibrated pistons to cover viscosity ranging from 0.02 cP to 10,000 cP, a pressure transducer with its digital display, a temperature probe and a controlled temperature air bath.