... convert (change) sensor inputs and controlleroutputs from one analog form to another, more usable, analogform. A voltage-to-pneumatic transducer, for example, convertsa controller variable ... cost, andreliable actuators for large valvesand dampersSimplestmodulating control Most common for simple on-off control Integral sensor/controllerSimple sequenceof control BroadenvironmentallimitsComplexmodulatingactuators,especially ... pneumatic actuator controlling a valve.As air pressure in the actuator chamber increases, thedownward force (F1) increases, overcoming the springcompression force (F2), and forcing the diaphragm...