Author: joyo

Armoured level gauge: Armored level gages are used in a variety of applications, such as in petrochemical refineries and chemical plants. They work well in high-pressure environments, coming in a variety of PSI ratings up to 4000 PSI. They are available with transparent and reflex gauge glasses.

Tubular level gauge: Tubular gauges come with a clear or red line Borosilicate (Pyrex) to help improve visibility and measurement of clear fluids. They are often used in low-pressure applications up to 600 psi. Normally, they are recommended for use with oils and petrochemical liquids as opposed to water or steam as there is a possibility of the gauge’s steel valves developing rust or corrosion. However, the tubular gauges sold at McRae Engineering have automatic valves made with corrosion-resistant ball checks and stainless steel valves.

Magnetic type level gauge: For this type of level gauge, the chamber is constructed of non‐magnetic materials, with its float engineered and located inside the chamber. It is sized and weighed to the specific gravity of the process fluid to be measured. The float contains a 360° magnetic assembly, generating a strong uniform magnetic circuit. The float will move according to the changes in the liquid level, allowing for precise measurements.

As you can see, different types of level gauges work differently to suit different applications.

This article comes from mcraeeng edit released

Throughout this article we assume the density of the vapor in the headspace (typically air) to be negligible compared with that of the process fluid. We will assume also that there is only one, uniform, process fluid in the tank. Some of these technologies can be used for multilevel applications where two or more immiscible fluids share a vessel.

1. Glass Level Gauge. Available in a variety of designs, both armored and unprotected, glass gauges have been used for over 200 years as a simple method to measure liquid level gauge. The benefit of this design is the ability to the see the true level gauge through the clear glass. The down side is the possibility of glass breakage resulting in spills or safety to personnel.

2. Floats. Floats work on simple principle of placing a buoyant object with a specific gravity intermediate between those of the process fluid and the headspace vapor into the tank, then attaching a mechanical device to read out its position. The float sinks to the bottom of the headspace vapor and floats on top of the process fluid. While the float itself is a basic solution to the problem of locating a liquid’s surface, reading a floats position (i.e., making an actual level measurement) is still problematic. Early float systems used mechanical components such as cables, tapes, pulleys and gears to communicate level gauge. Magnet-equipped floats are popular today.

Early float level gauge transmitters provided a simulated analog or discrete level gauge measurement using a network of resistors and multiple reed switches, meaning that the transmitter’s output changes in discrete steps. Unlike continuous level-measuring devices, they cannot discriminate level gauge values between steps.

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Wetted surfaces are Type 316L Stainless Steel with an internal finish of 20 Ra/180 grit, borosilicate glass inner level gauge and gaskets per your specifications. The gaskets chosen will determine the temperature and pressure ratings of the unit and can be as high as 150psig.

The level gauge is manufactured from heavy wall borosilicate glass tubing, then tooled to a precision sanitary end configuration, similar to .75″ stainless steel sanitary fittings. The inner wetted borosilicate glass level gauge is then protected with an impact resistant full polycarbonate shield, which is held in place with delrin shield guides.

Vessel connections vary with application, however .75″ sanitary tri-clamp ends are standard and center to center lengths are per your specification. Pressure ratings are up to 150 psig – full vacuum, temperature ratings are up to 350 F.

Options for the sanitary level gauge include materials of constructions, SS, Alloys and plastic, connection configurations, lengths, shielding and gaskets.

This article comes from chem edit released

Sight glass liquid level gauges are a mainstay of fluid processing operations that store raw materials, intermediate, or final product in tanks and other vessels. Having a direct visual indication of fluid level at the tank enhances safety and provides the all important data point about what is happening inside the tank.

These level gauges are installed on the exterior of the tank, exposed to whatever environmental or operational hazards existing or occurring at the location. Armored level gauges are appropriately named because of their construction. They are designed to resist impact and mechanical stress, as well as a range or environmental conditions.

There are generally two versions of armored level gauges, reflex and transparent. The names refer to way in which light is handled by the gauge to reveal the liquid level.

Reflex Level Gauges are ideal for clean total level indication applications for refining, petrochemical and general use applications. The reflex prisms are molded and polished to provide a crisp black-silver bi-color indication of the fluid level. As light passes into the reflex glass, if there is fluid present, the light continues through the glass and reflects off the back of the level gauge, providing a black color for fluid level regardless of the actual color properties of the process fluid. If fluid is not present, the light is reflected off the glass back towards the user, providing a shiny silver or mirror-like appearance to indicate vapor space.

Transparent Level Gauges are selected for interface level indication, dirty service or any application that requires the use of a shield to protect the glass from corrosion. A transparent gage is also known as a “thru-vision” gauge since the gauge is constructed with two pieces of flat polished glass assembled on opposite sides of the level gauge chamber. Since the user can see straight through the gauge, it is also easy to view the fluid properties, such as color, whereas this would not be possible with a reflex gauge. The use of an illuminator is always recommended on a transparent gauge.

Selecting an armored level gauge is an exercise in preparing for known and unknown events that might disable your ability to directly read fluid level. Armored level gauges are employed extensively in chemical, petrochemical, and other industries where reliability under challenging conditions is essential. Wherever there are mechanical hazards, an armored level gauge may ultimately prove to be cheap insurance against downtime or delay.

This article comes from meadobrien edit released

The TC tank level gauge provides accurate level measurement of liquid contents within any form of containment tank.

The level gauge integral sensor converts hydrostatic head pressure, thereby allowing continuous readings.

The rugged 316 stainless steel construction proves ideal for use with oil, water and other compatible chemicals.

We have designed level gauges, indicators and valves with utmost care for getting the maximum economy accuracy and durability. Your level indicators and level gauge should have the same strength as your vessel to withstand the high pressures to which it is subjected and the corrosive characteristics of the fluid.

Also, your valuable process fluid should never leak out through the glass fitting. In industries, you may have to measure the levels of colorless liquids, interface of immiscible fluids, liquids with sub-zero temperatures and liquids with too much foaming.

All these requirements can be met with by our latest types of tubular level gauges, flat glass level gauges and magnetic non-contact type level indicators. We manufactures following type of Level instruments:

1. Tubular Level Gauges

2. Heavy Duty Tubular Level Indicators

3. Reflex and Transparent Level Gauges

4. Boiler Level Gauges

5. Magnetic Level Indicators

6. Float & Cord Level Indicators

7. Dip Sticks & Dip Tape

8. Knob Type Level Indicator

This article comes from fluidyne edit released

Several forms of level gauges exist in the industry. Depending upon the types of liquids such as water, oil, diesel etc. measured by level gauges, they can be classified into following categories:

Tank level gauges

These level sensing devices generally determine volume of liquid enclosed in the tank.

Fuel level gauges

These devices mainly provide fuel level readings in case of automobiles and other equipments consuming fuel.

Water level gauges

These level gauges are basically applied to determine the rise or fall occurring in water level.

Mechanical level gauges

This category of level gauges is mainly employed in underground storage tank applications for measuring the level of liquid.

The control magnetic level gauge is designed so that the liquid being measured is enclosed within a sealed chamber. A stainless steel, titanium or plastic float fitted with a permanent omni-directional magnet moves freely inside the chamber and actuates the magnetic wafers contained within the indicator.

As the float rises and falls on the liquid level gauge each wafer rotates 180o and so presents a contrasting colour. Those wafers above the float show white, whilst those level gauge and below show red – the indicator then presents a clearly defined and accurate level gauge of the liquid in the chamber.

This simple technology provides a clear and very effective way to read your liquid level gauge within any process vessel.

This article comes from tc-fluidcontrol edit released

The sanitary level gauge offers a 360-degree view of the process fluid for liquid level verification, and process validation. Unique end fittings with integral 90 degree elbows, reduces process dead space, increases tank visual verification area, and eliminates the leak paths associated with secondary fittings.

Wetted surfaces are Type 316L Stainless Steel with an internal finish of 20 Ra/180 grit, borosilicate glass inner sight tube and gaskets per your specifications. The gaskets chosen will determine the temperature and pressure ratings of the unit and can be as high as 150psig.

The sight tube is manufactured from heavy wall borosilicate glass tubing, then tooled to a precision sanitary end configuration, similar to .75″ stainless steel sanitary fittings. The inner wetted borosilicate glass sight tube is then protected with an impact resistant full polycarbonate shield, which is held in place with delrin shield guides.

Vessel connections vary with application, however .75″ sanitary tri-clamp ends are standard and center to center lengths are per your specification. Pressure ratings are up to 150 psig – full vacuum, temperature ratings are up to 350 F. Others specifications are available, please consult the factory.

Options for the sanitary level gauge include materials of constructions, SS, Alloys and plastic, connection configurations, lengths, shielding and gaskets.

This article comes from chem-flowtronics edit released

The bypass level gauge is one of the simplest and most robust method to liquid level monitoring.

Bypass level gauges are one of the simplest and most robust means of liquid level monitoring. A chamber is mounted on the side of a tank or container by two process connections. This direct connection ensures that the level in the chamber corresponds precisely to the level of the liquid in the tank or container.

Inside the bypass chamber there is a cylindrical float with built-in permanent magnets, where the concentrated magnetic field produced travels through the chamber wall to an external indicator. Along with the magnetic roller indicator, the Bypass Level Gauges can also be equipped with magnetic switches and level transmitters (magnetostrictive or reed type).

Advantages are a simple, robust, and rugged design, no direct contact with aggressive fluids by sensitive measurement and indicating instruments, and guaranteed operation of the magnetic roller indicator without requiring an auxiliary power source, even in the event of power failures. These gauges are applicable throughout industry thanks to the use of a range of corrosion-proof materials. Designs are available for pressure ranges from vacuum up to 400 bar, temperature ranges from 167°C to +400°C, and densities of 350 kg/m³.

This article come from hma edit released