Introduction to force balance instruments When equal force is applied to both sides of an object then the force is balanced and there won’t be any motion. Pneumatics can be described as the process in which pressurized gas is utilized to create mechanical motion. In a pneumatic system air is the important source for the …
What is a pneumatic valve Positioner? The pneumatic valve positioner is an instrument used for positioning the control valve stem in accordance with the pneumatic signal of 3-15 PSI received from a controller or from a manual loading station. A valve positioner is used to increase or decrease the air pressure to drive the actuator. The pneumatic …
Introduction While electricity is commonly used as a medium for transferring energy across long distances, it is also used in instrumentation to transfer information. A simple 4-20 mA current “loop” uses direct current to represent a process measurement in percentage of span, such as in this example: The transmitter senses an applied fluid pressure from …
