Tank gauging systems are used to measure and monitor the level of liquids or gases in tanks, vessels, or silos. There are several types of tank gauging systems available, each with its own advantages and limitations. Here are some of the most common types of tank gauging systems:
Float and Tape Tank Gauging System: This is one of the oldest and simplest types of tank gauging systems. A weighted tape is suspended from a float that floats on the surface of the liquid in the tank. The tape is marked with graduations that indicate the level of liquid in the tank. This system is easy to install and maintain, but it requires manual reading of the tape, which can be time-consuming.
Servo Tank Gauging System: This system uses a servo motor to drive a measuring probe that is immersed in the liquid in the tank. The motor measures the level of the liquid by sensing the torque required to rotate the probe. The servo tank gauging system is accurate and provides real-time measurements, but it is more complex and expensive than other systems.
Radar Tank Gauging System: This system uses radar technology to measure the level of the liquid in the tank. A radar signal is transmitted from a sensor at the top of the tank, and the time taken for the signal to reflect back from the liquid surface is measured. This system is accurate and provides continuous measurement, but it is expensive and requires regular maintenance.
Hydrostatic Tank Gauging System: This system measures the pressure at the bottom of the tank to determine the level of the liquid. The pressure measurement is converted into a level measurement using a formula that takes into account the density of the liquid. This system is accurate and reliable, but it requires calibration for different liquids and operating conditions.
Optical Tank Gauging System: This system uses optical sensors to measure the level of the liquid in the tank. The sensors detect the amount of light that is reflected back from the liquid surface, and this measurement is used to determine the level of the liquid. This system is suitable for clean liquids and provides continuous measurement, but it is sensitive to changes in the optical properties of the liquid.
A digital portable density meter is a handheld instrument used to measure the density of liquids and gases. It is commonly used in industries such as food and beverage, pharmaceuticals, and chemical manufacturing to ensure product quality and consistency.
The density meter works by measuring the buoyancy force on a submerged object, such as a small sphere, and then calculating the density of the fluid based on the mass and volume of the sphere. This method is known as the oscillating U-tube principle.
Digital portable density meters typically have a range of measurement capabilities, from low-density liquids such as oils and alcohols, to high-density liquids such as acids and detergents. They may also be able to measure the density of gases, although this may require additional equipment and calibration.
In addition to density measurement, some digital portable density meters may also have additional features such as temperature measurement and automatic calculation of other parameters such as specific gravity and concentration.
The portability of the density meter allows for on-site measurements and the ability to quickly verify the density of a sample, without having to transport the sample to a laboratory. This can save time and reduce the risk of contamination or sample degradation.
A propane float servo tank gauge consists of moving parts located both inside the tank and outside. At the end of the stem is the float that rises and falls with the level of the propane in the tank.
The float servo tank gauge only provides an approximate tank percentage and cannot be considered 100% reliable. The fixed liquid level gauge is utilized for filling. Tanks with float servo tank gauges measure the volume of the tank as a percentage of the total capacity of the container.
As mentioned above, the float servo tank gauge is not a fully reliable instrument for measuring tank volume. Float servo tank gauges have numerous moving parts that are subject to wear and tear and can also become ineffective in any part of the assembly. If the servo tank gauge needs replacement, the propane tank must be empty.
Restricted and open portable gauging provide a convenient and accurate means for measuring ullage, product temperature and the oil-water interface.
The units are configured to operate in the trimode, bimode, interface or temperature mode. Each portable gauging is designed to maximize ease of use. A single penetration of each tank can provide comprehensive data about internal tank conditions.
When the electronic probe senses hydrocarbon, a steady tone is heard; when sensing water, it emits an intermittent tone. Temperature is shown on an LED display in the hub of the instrument.
We have delivered reliable grounding and overfill monitors that prevent dangerous spills and accidents. From grounding and overfill protection systems and cane probes to rack monitors and heavy-duty plug/cord sets, our products offer reliable, enduring solutions for our client’s greatest challenges.
We offer a full line of grounding and overfill protection systems. Ideal for preventing costly spillage, rack monitors provide automatic warning of product overflow at predetermined levels. Rack monitors provide similar benefits, using a standard thermistor signal format to communicate with thermistor systems on transports or onboard control monitors.
Specially made to offer overfill detection in the absence of sensors within a railcar or tank, probes provide enhanced reliability regardless of variations related to the environment, product, or temperature conditions.
Plug and cord sets provide easy use and handling while offering enhanced corrosion resistance, safety, reliability, and long product-cycle life.
Servo tank gauging system operate on the principle of displacement measurement. A small displacer on a measuring wire is unwound from a drum and accurately positioned in the liquid medium using a servo motor. The weight of the displacer is precisely balanced against a magnetic coupling and the wire drum. When the displacer is lowered and touches the liquid, the weight of the displacer is reduced because of the buoyant force of the liquid.
As a result, the torque in the magnetic coupling is changed and this change is measured by 5 sets of Hall sensors. The signal, an indication of the position of the displacer, is sent to the motor control circuit. As the liquid level rises and falls, the position of the displacer is automatically adjusted by the drive motor. This system provides an outstanding accuracy of +/- 0.7 mm. Servo tank gauging system are ideally suited for light and middle distillates of petroleum.
Portable gauging for mobile use for the accurate measurement and recording of pressure profiles. There are interchangeable pressure sensors with measuring ranges of up to 8,000 bar available for the instruments.
Through this, portable gauging are particularly suitable as test instruments for a large variety of applications in the widest range of industries.
Data recorded in the portable gauging can be evaluated via PC software. Some instruments document calibrations in the internal memory, which can later be read on a PC.
The portable density meter is designed for petroleum testing applications. This portable tester is commonly used in refineries, fuel terminals, offshore and transportation applications.
The portable density meter is intrinsically safe in hazardous testing environments. All wetted parts and the special housing are resistant to petroleum samples and similar solvents. The leak-proof sealed housing is safe against humidity and spills and makes the unit suitable for harsh industrial and field conditions.
The portable density meter is an officially accepted field method for the new ASTM Standard “D7777-12” which describes the “Test Method for Density, Relative Density, or API Gravity of Liquid Petroleum by portable density meter ” with a minimum accuracy requirement of 0.001g/cm3.
The main element of the level gauge is the body. Incorporated into this body are the liquid channel (if necessary the heating channel) and the seating faces for the chambered seals and sight glasses.
Onto the body are mounted, or are already integrated, the valve heads and process connections. Drain or vent are also possible.
Applications of the level gauge:
- Continuous level indication without power supply.
- Direct indication of the level.
- Individual design and corrosion resistant materials make the products suitable for a broad range of applications.
- Chemical, petrochemical industry, oil and natural gas extraction (on- and offshore), shipbuilding, machine building, power generating equipment, power plants.
- Oil and gas, heat transfer and refrigeration systems, plants for cryogenics.