Load cells are transducers that are used to convert work, force or pressure into an electrical signal. Load cells are also called as load transducer or load sensors. The force is measured on the basis of deflection or increase in fluid pressure. There are electronic and pneumatic/hydraulic type load cells: Electronic load cells: The electronic load …
Operating Principle A diaphragm seal is attached to the process connection of the instrument. The hermetically sealed system is vacuum filled with liquid, or fill fluid. The pressure applied to the diaphragm is hydraulically transmitted to the pressure instrument. Diaphragm Seal and Instrument Assembly To ensure that the pressure is correctly transmitted from …
Metal thin-film sensor The main body and the diaphragm of a metal thin-film sensor are usually made of stainless steel. They can be manufactured with the required material thickness via machining the diaphragm in automatic precision lathes and then grinding, polishing and lapping it. On the side of the diaphragm not in contact with the …
Difference between metal thin film & ceramic thick film sensor Read More »
Introduction Pneumatically operated control valve actuators are the most popular in use, but electric, hydraulic and manual Actuators are also widely used. The pneumatic spring and diaphragm actuator is most commonly specified due to its reliability and simplicity of design. Pneumatically operated piston actuators provide high stem output power for demanding service conditions. The adaptations …
Introduction  Bourdon tube uses a coiled tube which as it expands due to pressure increase causes a rotation of an arm connected to the tube Working principle The pressure sensing element is a closed coiled tube connected to the chamber or pipe in which pressure is to be sensed. As the gauge pressure increases the tube will tend …
What is control loop? A Control loop is the fundamental building block of the industrial control system or industrial automation. It is a group of components working together as a system to achieve and maintain the desired value of a system variable by manipulating the value of another variable in the control loop. An instrumentation …
Developments in Instrumentation Engineering The origins of instrumentation can be traced back to ancient times when early civilizations used basic instruments to measure time, distance, and weight. For example, the ancient Egyptians used a simple water clock to measure time, while the Greeks developed the first odometer to measure distance. The development of modern instrumentation, …