The Cheminert C52 series injector is an integrated motor-valve assembly designed specifically to be built into an OEM system. Using the Cheminert HPLC injector design and the 24-V motor from the company’s microelectric actuators, the injector needs only to be connected to the instrument’s power supply. Control is simplified to require a single contact closure; the injector’s position is determined by whether the closure is held high or low. The optional serial interface permits confirmation of valve position and access to a variety of other features.