Posted on

Level gauge sizes and uses

Level gauges are sized by their body length, measured from the extreme top and bottom of the gauge, and the sight length, which represents the available length of viewable window available.

The sight length determines the minimum and maximum level readings that can be obtained from a given size gauge. In the case of magnetic level gauges, the sight length is not relevant, as the float movement is the deciding factor in establishing the size of the level gauge in terms of measuring the minimum and maximum fluid levels over which the gauge will function.

Liquid level gauges can be used as drum level gauges, tank level gauges, oil level gauges or water level gauges, to name a few common applications. They can also be employed as cryogenic tank level gauges for liquified gas applications.

This article comes from thomasnet edit released

Posted on

Servo gauge measurement

Continuous liquid level measurement in custody transfer and inventory control applications

Servo gauge instruments offer high precision measurement for liquid level, interface and density applications. The devices fulfill the exact demands of tank inventory management and loss control and are optimized in regards of total cost saving and safe operation. Check out the broad range of Proservo devices for servo gauge applications and click on the button below.

Servo gauge measurement

Our product finder helps you to search for suitable measuring devices, software or system components via product characteristics. Applicator leads you through an individual product selection via application parameters.

Servo gauge devices as tank gauging instruments are used for custody transfer and inventory control applications with NMi- and PTB-approvals and meet the requirements according to OIML R85 and API 3.1B. Proservo is especially suited for high accuracy custody transfer measurement in crude oil, gasoline, diesel, petrochemicals and chemicals.

Servo gauge measurement: Measuring Principle

A small displacer is accurately positioned in a liquid medium using a servo motor. The displacer is then suspended on a measuring wire which is wound onto a finely grooved drum housing. When the displacer is lowered and touches a liquid, the weight of the displacer is reduced by liquid buoyancy force. As a result, torque in the magnetic coupling changes, which is measured by 5 sets of Hall sensors.

Benefits

Unaffected by medium properties like conductivity or dielectric constant.

This article comes from endress edit released

Posted on

Tank gauge for LPG LNG Archives

The Tank gauge for LPG LNG is a mechanically operated, float & tape instrument designed to provide continuous liquid level measurement in bulk storage applications. This simple and reliable instrument has been used for managing inventory in the oil and gas industry for the past 90 years.

Meets API Standards

The Tank gauge for LPG LNG meets API Chapter 3.1B regulations for inventory control applications with a measurement accuracy of 0.2” (4 mm). It’s also built in the USA to 3rd-party quality assurance standards, and is ATEX approved for use in potentially explosive atmospheres.

On Your Tank gauge

Select the installation kit suitable for your bulk liquid storage tank. Floats are available for standard, interface or stilling well applications. If you have one of our competitors gauges we can easily upgrade the gaugehead, float, and tape, without replacing the hard-mounted tank fittings.

Data in the Control Room

If electronic transmission of level data or temperature measurement integration is required in the control room, then the gauge can be fitted with an optional tank gauging transmitter.

Optimize Performance

If it’s time to replace your negator motor, consider upgrading to a Negator Cassette. The cassette optimizes the performance of your gauge by reducing friction for smoother operation. It also reduces maintenance and extends the working life of the gauge by protecting the motor from contaminants that may enter the gaugehead.

Training and Support

The Tank gauge for LPG LNG, its accessories, and it’s spare parts are available to ship today. Every part is supplied with detailed user instructions, but sometimes you need to see how it’s done. That’s why we also have a YouTube channel with basic how-to-videos. If you need direct support, we offer standard training and service programs that we tailor to your staff, and your facility.

This article comes from varec edit released

Posted on

Custody transfer in tank gauge LTD

Industry in South Africa is moving vast quantities of petroleum and chemical products for export, import, local trade, and storage. Typically, international movements are transported by sea in tankers carrying large quantities. Once a ship arrives berthing costs begin to apply requiring a speedy transfer of the product. Flowmeters are inadequate in size, and the alternative is custody transfer by tank gauge LTD. However, there are some complications.

Gone are the days when it was acceptable in South Africa to transfer the custody of any product by measure providing that both parties are satisfied with the measuring equipment used. It is now necessary for the apparatus to be in accordance with a South African national standard written to detail the equipment requirements, and the method of use for this equipment. However, there is a major difficulty with this in South Africa, and that is there is no standard that covers custody transfer by tank gauge LTD.

Why required?

An obvious question comes to mind. Why is it necessary, since there is a standard for flow metering, and the transfer can be suitably monitored using this tried and trusted method? The reply in part is: flowmeters and checking devices are not large enough for metering the discharge from ocean-going supertankers.

Points for consideration

It should be remembered that in tank gauge LTD, the level measuring instrument itself is not the difficult component in these applications. The following parameters also need consideration.

1. The tank itself:

a. The deformation of the sides due to product level, product temperature, and ambient temperature.

b. The deformation of the floor due to product level, product temperature, and ambient temperature.

c. The deformation of the roof due to tank movement and loading on the roof.

2. The product conditions:

a. The temperature.

b. The pressure

c. The transfer is normally specified in standard units rather than measured units. This requires a density correction to the measured volume to obtain standard volume. In South Africa correction is to 20°C, however, 15°C and 60°F are also used.

3. The gauge support structure.

4. The amount of water in the bottom of the tank.

5. The operator interface.

This article comes from instrumentation edit released

Posted on

Real-Time Accountability of Tank Terminal Automation

With the Tank Terminal Automation, facilities can improve the visibility and accountability of all products stored at the terminal. Tank Terminal Automation operators are able to reconcile book versus physical inventory for all managed products, including additives, blends and co-mingled products.

The Tank Terminal Automation can lock down accounting periods, automatically create close-out reports and quickly identify variances. The daily management of product inventory allows for improved billing cycles. All of this data is also available at the enterprise to provide greater insight into an organization’s total stock position.

This article comes from varec edit released

Posted on

Types of Level Gauges

Level gauge is a device which is used to show the level of fluids in fields. Depending on the type of application used, the type of level gauge should be selected. Level gauge is a direct method for measuring the level.

Level gauge consists of a metal body, machined to have an internal chamber and one or more front windows. On each window a special high resistance glass is used with sealing joint and metal cover plate hold by bolts and nuts.

Level devices operate under three main different principles:

  1. The position (height) of the liquid surface
  2. The pressure head
  3.  The weight of the material

Types of Level Gauge:

There are commonly 3 types of level gauges used:

  1. Reflex level gauge
  2. Transparent level gauge
  3. Magnetic type level gauge

Reflex level gauge:

Reflex glass level gauges working principle is based on the light refraction and reflection laws.

Reflex glass level gauges use glasses having the face fitted towards the chamber shaped to have prismatic grooves with section angle of 90°. When in operation, the chamber is filled with liquid in the lower part and gases or vapors in the upper part.

The liquid level is well-known by different brightness of the glass in the liquid and in the gas/vapor zone. The reflex level gauges do not need a specific illumination. The day light is enough for seeing the level.

Posted on

Application of automatic tank gauge system

Automatic tank gauge system can accurately monitor your tank in real time. Windbell’s automatic tank gauge systems include SP series magnetostrictive probe and SS series console or SM controller.

Whatever and wherever you want of product level, water level, five-point temperature, inventory, delivery and sales information, Windbell’s automatic tank gauging system will always here to help you easily reach the target.

Magnetostrictive Probe

Magnetostrictive probe is the core component of automatic tank gauge (ATG), and it adopts latest magnetostrictive technology, can accurately measure the product level, water level and temperature in tank.

Automatic Tank Gauge Console

SS series smart console is the operation platform, the data processing and record center, and also offer safety and reliable power to probe.

This article comes from windbellatg edit released

Posted on

Common Servo Gauge Technologies and How They Work

The intelligent servo gauge Proservo NMS5 is designed for high accuracy liquid level measurement in custody transfer and inventory control applications.

It fulfills the exact demands of tank inventory management and loss control and is optimized in regards of total cost saving and safe operation.

This article comes from endress edit released