Author: joyo

Reflex level gauges may be applied in numerous applications to include feed water heaters, DE aerators, boiler drums, and other types of tanks.

For a reflex level gauge, within the recess of a liquid chamber and behind a single piece of glass, is the liquid column that clamps down onto the gauge body. This glass is flat on the outside and on the inside has a series of prism grooves that face the vapour and liquid space. Based on whether light enters the vapour or liquid space, it is reflected or absorbed, respectively.

Once light encounters a groove’s surface within the vapour space it reflects to the surface of the grooves on the opposite side, followed by reflecting completely back to the observation direction. During the liquid phase, light is absorbed, which creates one display for the area that is covered by liquid and another display for the area located above the liquid.

Using the prism glass, a reflex level gauge accurately measures liquid inside the vessel. When light hits the glass where there is no liquid, the prism reflects the light directly out of the gauge. Known as the “dry” area, a silver colour is displayed while the “wet” part is displayed in black. The contrasting colours create a clear delineation line that makes it easy to view the measurement.

The external chamber is a self-contained cage designed for use with our top mounting level transmitters or switches. Quality construction and a wide selection of configurations make this cage an ideal means of utilizing the power of our many technologies without mounting directly into the process vessel.

Level gauges provide a number of benefits that are industry-specific. A manufacturer like Shridhan that has specialized expertise in Manufacturing level gauges you have full assurance of enjoying optimal performance and reliability.

We understand each and every application and their advantageous to our end-users, making our products precise.

This article comes from shridhan edit released

Liquid level gauges are used to monitor and regulate levels of a particular free-flowing substance within a contained space. These substances are usually liquid, however liquid level gauge can also be used to monitor solids, such as powders. There are many different types of liquid level gauge, and they have several uses, both industrial and in the household for example.

Liquid level gauges are widely used industrially. Cars use liquid level gauge to monitor a variety of liquids, including fuel, oil and occasionally also specialist fluids such as power steering fluid. Liquid level gauge can also be found in industrial storage tanks, for slurries, and water level gauge can even be found in household appliances such as coffee machines. Basic liquid level gauge can be used to identify the point at which a liquid falls below a minimum or rises above a maximum level. Many liquid level gauge can detail the specific amount of liquid in a container relative to the minimum/maximum levels, to provide a continuous measurement of volume.

There are a number of different types of liquid level sensor used to detect the point level of a liquid. Some types of liquid level sensor use a magnetic float, which rises and falls with the liquid in the container. Once the liquid, and by extension, the magnet, reach a certain level, a reed magnetic switch is activated. Commonly, there is a switch towards the top and the bottom of the container, allowing detection of minimum and maximum levels of liquid. Many liquid level gauge also include a protective shield to protect the magnet from turbulence or interference from direct contact with the liquid.

Another common type of liquid level sensor is known as a Conductive sensor. Only liquids which conduct electricity can be used in this liquid level sensor. A Conductive Sensor includes a source of power, usually of a fairly low voltage. At least two electrodes are placed within the container. When a conductive liquid reaches a certain point, it will come into contact with both a longer and a shorter electrode, and thus complete a circuit and activate an internal switch.

Pneumatic sensors are also a fairly common occurrence with particularly hazardous liquids, or in systems where the use of electricity is not viable or possible. This is because the sensor itself does not come into direct contact with the liquid at all. The sensor detects the level of air between the liquid and the pneumatic sensor, then uses this to calculate the amount of liquid used to fill the remainder of the container. These types of liquid level gauges are also relatively cost-effective.

There are also other types of liquid level gauge which offer continuous measurement of liquids. Magnetostrictive liquid level gauges are similar in design to regular magnetic float sensors, yet the magnet level is measured using a magnetostrictive wire, which will react when its magnetic field is interrupted by the presence of the magnet. The exact point at which this interruption occurs can be determined by the distance between the bottom of the wire and the point of interference. Alternatives to this design include a magnetoresistive sensor, whereby an additional magnet is inserted onto the arm of the float, allowing accurate triangulation of the exact position of the magnets. This type of liquid level sensor is commonly used in conjunction with computer programs due to its accuracy. A non contact liquid level sensor features advanced signal processing technology in order to enable non contact liquid level detection.

This article comes from tc-fluidcontrol edit released

The magnetic level gauge working principle is widely used in level instrumentation. The interaction between float magnets inside the chamber and magnetic flags outside the chamber provide virtually maintenance-free, continuous level information. This type of level gauge doesn’t require power, making it ideal for a variety of applications across industries.

The magnetic level gauge working principle is based on the effects that one magnet has on nearby magnets. The mechanics are simple yet very effective, yielding reliable and repeatable level information for continuous monitoring and recording of fluid levels.

What Is the Magnetic level gauge Working Principle?

The working principle behind a magnetic level gauge is that the measuring instrument shares the same fluid — and therefore, the same level — as the vessel. The level gauge is attached to the vessel and connects directly with the fluid to be measured. Within the chamber is a float with a magnet assembly inside. This float rests on the fluid’s surface. As the fluid level rises or falls, so does the float. As the float moves up or down, the magnet assembly rotates a series of bi-color magnetic flags or flaps, changing the visual indicators mounted just outside the chamber from one color to the other.

Since the magnetic level gauge working principle relies on the interaction between magnets, these level measuring instruments do not need a power source. They are also virtually maintenance-free. An additional advantage: The indicator’s magnetic force can affect optional switches or transmitters mounted outside of the chamber. The colored flags are easy to see, even from a distance, and are paired with a scale for precise readings. As for any level instrumentation, the size and material of the float are chosen according to the media, temperature, pressure, and density of the process media.

This article comes from wika edit released

Level gauge measurement is essential whenever a production process uses liquids or small particulates. As technology advances, new types of measurement tools that use radar or ultrasonic frequencies have emerged, but in many cases, level gauge measurement systems are still the best option. Let’s take a closer look at the benefits of relying on level gauge measurement systems over other industry options.

Accuracy

While non-contact measurement systems can be accurate, they often need recalibration to ensure they’re providing the correct information. Most level gauge measurement systems are straightforward — for example, float switches are nothing more than a float attached to an arm. It’s the same technology that controls your car’s fuel gauge. Other variables that could affect a non-contact reading, like foaming, don’t influence them. These simple devices can also provide accurate readings in many different substances, from liquids to solids or small particulates without any additional calibrations. That’s something not even guided wave radar sensors can do.

When two liquids of different densities are in the same tank, non-contact systems can’t measure them accurately. Interface sensors could tell you how much total liquid is in the tank, but don’t know where the two different fluids separate or the level gauge of the bottom liquid.

Durability

One of the best things about contact measurement systems is their simplicity. They usually don’t have a lot of moving parts, which means they require less maintenance and are infinitely more durable than non-contact systems. Their simplicity also means if an element does fail, it’s often easy to replace without having to empty the tank or interrupt the supply chain.

This feature is valuable in the process industry, especially if the materials stored in the tank are caustic, corrosive or otherwise too dangerous for human workers to enter to effect repairs. Many industries use acid in various concentrations for a variety of different tasks. Even when empty, an acid tank may be too dangerous for a maintenance worker to enter, even with the proper personal protective equipment.

Customization

Not all measurement systems are equal, but that isn’t a bad thing. Some level gauge measurement systems will only work for liquids, while others can work for liquids, particulate matter and slurries with equal accuracy. These measurement systems are easy to customize for different materials. Many contact measurement systems won’t work well for corrosive or sticky materials — an optical switch, for example, might not work well in oil because the sticky substance will cover the prism and prevent it from transmitting light.

This customization also makes it simpler to connect multiple different types of systems to a single readout so workers can monitor the level gauges remotely without having to make a trip to each tank. If you’ve got containers of oil, acid and water in the same facility, you don’t need to use the same system for each of them, but link them on one readout for ease of monitoring.

This article comes from controlglobal edit released

Magnetic Level Indicators, also referred to as level gauges, consist of a chamber, a magnetic float and a flipper type indicator scale mounted to the side of the chamber. Understanding the operation of the Magnetic level gauge indicator is quite simple. The fluid in the tank seeks its own level inside the chamber.

The magnetic float in the chamber rises and falls with the fluid level gauge. As the Magnetic float rises and falls, it changes the orientation of the flippers on the scale providing a visual level indication. In addition, as the magnetic float rises and falls, it actuates any transmitter or alarm switches that are attached to the side of the gauge.

Magnetic level gauge indicators are custom made based on your requirements. The float construction is determined by the process fluid, pressure, temperature and specific gravity of the fluid. Magnetic level gauge indicators are generally made of 316SS, but can be made from a variety of other materials including CPVC, Kynar, Hastelloy, Monel or other exotic metals. A variety of mounting style options and process connections are available to meet your needs.

This article comes from babbittinternational edit released

Slight glass level gauge

A glass of sight or a water gage is a transparent tube through which a tank or boiler operator can observe the level gauge of liquid contained in it.

It is positioned parallel to the vessel along the elevation over which the level gauge is to be indicated and mounted with appropriate fittings for retaining the pressure and sealing the ends of the sight tube.

However, this building is not well adapted for use with hazardous process liquids.

Reflex Level Gauges

A reflex gage is more complicated than a slight glass, but it can make a better difference between air (steam) and fluid (water).

The gage comprises a vertically oriented slotted steel frame with a powerful glass tray installed on the open end of the cabinet facing the user, rather than holding the documents in a glass box.

Most of the light is transferred from the bottom of one drawer to the next and back to the user in the area that is contact with the water, appearing creamy white. In the area in touch with the fluid, most of the light is refracted into the fluid, which causes this area to look nearly black to the user.

Bi-Color Level Gauges

For caustic media, a bi-colour gage is usually chosen to provide protection for the crystal. The gage comprises of a vertically oriented, slotted steel frame with a powerful simple front and back glass.

The front and rear surfaces of the body are in vertical planes that are not parallel. Behind the reference body are light sources, typically red and green, with two quite distinct colors. The fluid area looks blue to the viewer due to the distinct refraction of blue and blue light, while the gas area looks purple

Magnetic Level Gauges

The magnetic value gage does not take an immediate view of the point (i.e., glass is not needed), the test room can be transparent and the building of welded steel is usually used.

This significantly improves the variety of working temperatures and reduces the roughness relative to test glass rooms. The broad temperature spectrum is feasible because the chamber of measurement can have about the same heat growth ratio as the ship, and there is no plastic to interact with the chamber of steel.

This article comes from automationforum edit released

Level gauges take level readings using several different techniques. The measurement technology should be chosen based on the user’s application. These level sensors also have different display options based on user preference.

Magnetic level gauges – A magnetic level gauge is used to control the level of fluids. The gauges operate under Archimedes Principle, which states that any object submerged in a fluid experiences the same buoyant force as the weight of the liquid displaced. Magnetic level gauges are extremely durable and can be used in applications that would break or destroy glass gauges. They can be used underground with a maximum working temperature and pressure range of 4000C and 220 bar. These gauges are capable of inter-phase level detection, even in highly toxic or corrosive mediums.

Reflex level gauges – A reflex level gauge is used to detect level in a vessel or container. It operates by using the dissimilarity in the index of refraction between fluids and vapors. They are usually made of carbon or stainless steel, which provides the durability needed to work in a temperature and pressure range up to 400°C and 400 bar respectively. If the vessel is filled with vapor, the observer will see a silvery white color because the light radiations running into the grooved surface of the sight glass will be completely reflected. If the vessel is filled with liquid, the observer will see black because the light radiations coming across the liquid region will be completely absorbed. The sight glass is a transparent tube which is clamped to the gauge body.

Transparent level gauge – Transparent level gauges are very similar to reflex level gauges. They consist of two transparent glasses which are integrated with the liquid cavities on both sides. Transparent level gauges work by detecting the dissimilarity in the transparent characteristics of two glasses which are integrated with the liquid cavities on both sides. In an application which uses water and steam, an illuminator is employed to make the liquid level easier to see. The light rays emitted by the illuminator are directed in an upward direction towards the water column causing the surface of the liquid to become illuminated. The light radiations generally fall upon the divided surface between water and steam and then reflect back to the eye of the user.

This article comes from globalspec edit released