Month: March 2021

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

Nuclear or nucleonic level gauge measurement devices can be employed in both point and continuous level gauge detection applications. They are usually applied in fields where all other level gauge measurement techniques fail to work owing to their capability of working with hazardous situations. In this method, energy needed for level gauge measurement is emitted arbitrarily by radio isotopes in the form of bursts.

The major source utilized in nucleonic level gauge controls includes gamma radiations. These are electromagnetic radiations which exhibit almost identical behavior to that of microwaves and light waves. However, they have comparatively higher energy and shorter wavelength owing to which these radiations are competent enough to break through the walls of process vessel and material.

The field strength of these gamma radiations is determined by a sensor mounted on the other end of the vessel, which ultimately detects the level gauge of process material in the vessel. “Different radioisotopes are used, based on the penetrating power needed to “see” the process within the vessel. With single point gauges the radiation provides a simple on/off switching function, whereas with continuous level gauge measurement the percentage of transmission decreases as the level increases.”

This article comes from chipkin edit released