![]() Vibrating fork level switch has SIL2 conformance and carry WHG overfill certification. The switch employs proven ultrasonic technology and solid state electronics. As a fail safe level switch it can be installed in any orientation, above, below or sideways even in pipework.įeatures and Benefits of Vibrating Fork Level Switch The LVSW-701 Series liquid level switch is a direct replacement for mechanical float-type devices. This releases the spring pressure and changes the electrical output.The Vibrating Fork Level Switch (Vibrofork) can be used on almost any liquid, from LPGs to bitumens. When the media level touches the displacer and submerges it, due to buoyancy force, the weight of the displacer in comparison to the acting media reduces. A displacer is used, which is a type of very heavy float, suspended by a spring. The LTU-2000 Series is based on the vibrating tuning fork principle, using piezoelectric crystals. The displacer level switch works on the principle of weight change. The LTU-2000 Series Tuning Fork Sensors are point level switches that are designed to detect low or high levels of liquids. It will act only if the media has some conductivity, which causes electrical resistance. An electronic circuit continuously excites the tuning fork, causing it to mechanically vibrate. Similar to the probes theory mentioned earlier, the variation of resistance between them (based on media level) varies the electrical output. The conductivity level switch working is similar to a capacitance level switch the only difference is that it works on resistance. As the level changes, capacitance varies and so is the electrical output. The capacitance between these two is varied by the level height of the media. Similar to a capacitor, the switch has an insulated electrode that performs the role of the first plate, and the tank wall (reference electrode) performs the role of the second plate. Wetted parts, the fork and proces Electrode level sensor for liquid fluid. Capacitive Level SwitchĪs the name implies, it works on capacitance. VQ is a compact level sensor ideal for integration into machinery. This shows that the pressure is the acting force for this switch. If the level is dropping, then the diaphragm will move downwards by the media and cause an increase in below-face pressure, changing the electrical output. If the level is rising, then the diaphragm will move upwards by the media and cause a decrease in below-face pressure, changing the electrical output. The diaphragm level switch consists of a diaphragm inside a module that rises up and down according to the pressure of the media applied. The switch is moved by the magnet which changes its position according to the floating level sensed. It is this switch that gives an electrical signal. The switch constitutes a magnet with a reed switch inside. The float level switch is mounted or floating on the media to be sensed. The float switch is the most used type of level switch. Paddle Type Level Switch Float Level Switch.A 'smart' microprocessor-based electronic unit keeps the sensor in a resonant state as it changes from dry to wet or wet to dry. Some types of level switches are mentioned below. The resonator utilizes a piezoelectric driven tuning fork that exhibits a large change in resonant frequency when immersed in any liquid. So, we can see that a level switch is used majorly in measurement and control applications, where they can indicate the high and low levels in process tanks. If the tank level goes low, then the input will turn off and the PLC will turn off the pump. It will sense the level of the tank and give an output to the PLC – either on or off. It is a transducer that uses various level sensing methods to convert mechanical energy into electrical energy. So, to avoid this, a level switch is installed in the tank. ![]() If the tank level goes low and still the pump is running, then it will damage it. When the pump is running, it is important to see that the tank is filled with water. You have a pump sucking water from it (the pump is controlled by PLC). The new LWT series of guided-wave radar builds on the legacy of the MT5000 series. Suppose you have a tank filled with water. Guided Wave Radar For high-accuracy, reliable measurements even in harsh conditions. A level switch is a digital input instrument, whereas a level transmitter is an analog input transmitter. ![]() As tanks are used in almost every process, it is important to know how much tank is filled or empty.įor this, two types of instruments are used – level switch and level transmitter. In an automation process, measuring the level of a liquid, powder, or granule is very important. In this post, we will learn about the level switch and the types of level switches.
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