Introduction Continuous nuclear level measurement is typically used where most other technologies are unsuccessful. Different radioactive isotopes are used, based on the penetrating power needed to pass through the tank. Radiation from the source is detected on the other side of the tank. Its strength indicates the level of the fluid. Theory Nuclear continuous level measurement works …
INTRODUCTION Ultrasonic makes use of sound waves in the 20 – 200 kHz range (above the range for human hearing). A transducer mounted in the top of a tank transmits sound waves in bursts onto the surface of the material to be measured. Echoes are reflected back from the surface of the material to the …
Introduction There are different kinds of indirect level measuring methods.In this session we are gonna discuss about laser level measurements.The working principle of laser level measurement is detecting the time taken by laser source for transmission and reflection back from the material surface. The laser level transmitter either uses triangulation, time of flight or confocal …
Introduction If the process liquid contains suspended solids or is chemically corrosive or radioactive, it is desirable to prevent it from coming into direct contact with the level transmitter. In these cases, a bubbler level measurement system, which utilizes a purge gas, can be used. THEORY As shown in Figure, a bubbler tube is …
Introduction A simple pressure gauge can be used for level measurement if its scale is properly calibrated for the actual level, inside the tank or vessel We are considering open tank Case1 Consider for instance the tank is 1000mm height & is filled with water of specific gravity 1.00 as shown in fig below …
Ultrasonic Level Detectors Ultrasonic sound waves with frequencies of 1 to 5 megahertz can be used to detect liquid or solid levels. Ultrasonic are sound waves but are at higher frequencies that cannot be detected by the human ear. The most common kind of ultrasonic transducer consist of a piezoelectric crystal.When a voltage is applied to …
Magnetic GaugesMagnetic gauges can often be used in applications where a sight glass is not practical.A Magnetic gauge uses the attraction between two magnets to follow the level of a liquid.One magnet float on the surface of the liquid.The other magnet is inside a nonmagnetic tube passing through the liquid. The passing through the liquid …
In a float operated level switch the float rides in the process liquid surface precisely tracking liquid surface motion.Rising liquid level lift the float sliding the attraction slip up inside the enclosing to and into the magnetic field to actuate electrical or pneumatic switch. Subsequently falling liquid level lowers the flow drawing the attraction slip …
Working Principle of a Float operated Level Switch Read More »
Displacer level instruments use the Archimedes Principle to measure the level of a liquid by measuring the weight of a rod that is immersed in the process liquid. As liquid level rises, the displacer rod experiences a greater buoyant force, appearing lighter to the sensing instrument, which interprets the loss of weight as a rise …
How does a Level troll work? Name the parts of a pneumatic Level troll.   Read More »