What is a Final Control Element?

What is a Final Control Element? Final control element is a device controlled by a controller to change the operating conditions of a process. Final control elements requires energy to operate against the process. This energy is usually in the form of air pressure, hydraulic pressure or electricity. There are a great variety of final control elements and accessories that make each one have its own characteristics to adapt to a particular process dynamic What are the common final control elements? The most common final element is a control valve. Once a control valve is triggered it changes the process […]

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5/2 way directional valve in a diagram

Example of using a 5/2 way directional valve as shown in a diagram Drawing below shows a double solenoid operated 5/2 way directional valve connected to a double acting cylinder/ with to proximity switch. the system is in idle condition.       When the start button is pressed momentarily. the cycle begins at logic 2 triggering EXT_B_SV solenoid which extends the cylinder. As soon as the proximity switch B_OUT is reached. Logic 3 comes in triggering RET_B_SV solenoid to retract the cylinder to its normal position.   When the push button is permanently pressed. The logic will flow continuously extending and retracting […]

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Microwave based flow detector

How does a Microwave based flow detector work? A microwave-based motion detector detects the Doppler shift of the flowing material. A complete flow detector consists of a transmitter and transducer. The transducer has a Gunn diode configured within a waveguide (horn) antenna and functions as both a microwave transmitter and receiver. The transmitter contains the measuring electronics and relay output. The Gunn diode emits a low power, continuous signal that is reflected from moving material in the process. It  monitors the movement of bulk materials and can be used to detect and indicate material blockages or feeder shutdowns.   If the reflecting […]

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How does a tilt level switch work?

The mechanical tilt level switch for bulk solids level measurement is the most simple, reliable, and economical solids level measurement technology on the market. Mechanical tilt level switches are ideal for applications such as grains, cereals, animal food, powders, and diverse bulk solids (pellets, stones, minerals, sawdust, etc.). For this reason, ATMI has developed its range of SOLIBA tilt level switches designed to stop the filling of diverse storage zones, such as: grain silos, port silos, airport silos, storage bins, bulk storage, etc. How does the SOLIBA tilt level switch work? The SOLIBA needs to be suspended vertically at the […]

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Limit Switch Application

What is a limit switch and how is it used in a control process? Limit Switches are simply switches that are commonly used to detect the presence of a moving object when the object reaches a desired location. When the limit switch is triggered, it will operate the contacts linked to it and will close or open an electrical connection. Limit switches are either normally open (N.O.) or normally closed (N.C.) contacts. One type of limit switch is a mechanical limit switch. It is used to detect the presence of an object when physical contact is made between the object and the switch. […]

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