Haydon Kerk Motion Solutions, a division of Ametek Inc., has unveiled a new version of its 36-mm G4 linear actuator. Included is an adapter plate that allows the smaller 36-mm-outer-diameter unit to replace 42- and 46-mm units in existing applications. The company says that the performance of the device approaches that of the larger 42- and 46-mm models from various manufacturers. The integrated adapter plate uses the same bolt pattern and pilot surface, allowing customers to replace existing 42- and 46-mm units easily. Advantages of substituting include a smaller linear actuator body, which is important when space is at a premium, and a lower cost system. The 36-mm model is suitable for medical equipment and laboratory instrumentation applications.