At first glance, most pneumatic control equipment seems like a maze of bellows, cams, beams, and other mechanisms packed into a small area. Sometimes the design makes it appear as if the instrument is hard to understand. However, many of these instruments are fairly easy to understand if you know what you're looking for. In this interactive online course, we'll look at a few types of force balance and motion balance instruments in greater detail. We'll see how they operate and where common adjustments are located.