Radar Sensor VEGAPULS 62 – the Universal Genius for Liquids Measurement
Level measurement of liquids under difficult conditions
The radar sensor VEGAPULS 62 handles difficult process conditions like extreme temperatures, overpressure or vacuum effortlessly: the instrument reliably measures the liquid level in storage tanks and process vessels in process temperatures from -200° C to +450° C.
Process pressures of -1 bar to +160 bar are no problem at all for the instrument. The version with horn antenna is especially suitable for measuring products like solvents, hydrocarbons and fuels. When equipped with a parabolic antenna, the instrument is particularly suitable for level measurement of liquid media with low εr value at large measuring distances.
Area of application
VEGAPULS 62 is primarily used in the chemical industry, in environmental engineering and recycling and in the petrochemical industry. It’s in these areas that the true specialty of the sensor, the ability to cope with extreme temperatures and pressures, is most frequently needed. Thanks to radar technology, the level sensor can detect the levels of liquids contactlessly and deliver continuous, high-precision measurement data.
VEGAPULS 62 continuously monitors the levels in process vessels and storage tanks, especially under difficult process conditions:
- Non-contact measurement
- Simple installation
- Wear and maintenance-free
- Independent of pressure, temperature, gas and vapour
- Process temperature: -200 … +450 °C
- Process pressure: -1 … +160 bar
Measuring range up to 35 m Process fitting thread or flange Process temperature -200 … +450 °C Process pressure -1 … +160 bar
Measuring precision +/- 2 mm Transmitting frequency K band
Radar VEGAPULS Product information Level measurement in liquids: VEGAPULS 61, 62, 63, 65, 66 Specification sheet - VEGAPULS 62 4 … 20 mA/HART - two-wire 4 … 20 mA/HART - four-wire Profibus PA Foundation Fieldbus Operating Instructions - VEGAPULS 62 - Hardware version ≥ 2.0.0 - Software version ≥ 4.0.0 4 … 20 mA/HART - two-wire 4 … 20 mA/HART - two-wire - Standrohrausführung 4 … 20 mA/HART - four-wire 4 … 20 mA/HART - four-wire - Standrohrausführung Foundation Fieldbus Foundation Fieldbus - standpipe version Profibus PA Profibus PA - standpipe version Operating Instructions - VEGAPULS 62 - Hardware version < 2.0.0 - Software version ≤ 3.8 4 … 20 mA/HART - two-wire 4 … 20 mA/HART - two-wire - standpipe version 4 … 20 mA/HART - four-wire 4 … 20 mA/HART - four-wire - standpipe version Foundation Fieldbus Foundation Fieldbus - standpipe version Profibus PA Profibus PA - standpipe version
Drawings - VEGAPULS 62 Horn antenna - flange - 130°C Horn antenna - flange - 130°C - purging connection Horn antenna - flange - 200°C Horn antenna - flange - 200°C - purging connection Horn antenna - flange - 250°C Horn antenna - flange - 250°C - purging connection Horn antenna - flange - 200°C - purging connection - antenna extension Horn antenna - flange - 450°C Horn antenna - thread - 130°C Horn antenna - flange - 130°C - purging connection Horn antenna - flange - 130°C - purging connection - antenna extension Horn antenna - thread - 200°C Horn antenna - thread - 250°C Horn antenna - thread - 250°C - purging connection Horn antenna - thread - 450°C Parabolic antenna - flange - 130°C Parabolic antenna - flange - 130°C - purging connection Parabolic antenna - flange - 200°C Parabolic antenna - flange - 200°C - purging connection Parabolic antenna - thread - 130°C Parabolic antenna - thread - 130°C - purging connection Parabolic antenna - thread - 200°C Parabolic antenna - thread - 200°C - purging connection Standpipe versions Standpipe extension - one-piece Standpipe extension - multi-part Drawings - Housing Plastic, cable entry M20 x 1.5 Plastic, cable entry ½ NPT Plastic double chamber, cable entry M20 x 1,5 Plastic double chamber, cable entry ½ NPT Aluminium, cable entry M20 x 1.5 Aluminium, cable entry ½ NPT Aluminium double chamber, cable entry M20 x 1.5 Aluminium double chamber, cable entry ½ NPT Stainless steel (electropolished), cable entry M20 x 1.5 Stainless steel (electropolished), cable entry ½ NPT Stainless steel (precision casting), cable entry M20 x 1.5 Stainless steel (precision casting), cable entry ½ NPT Stainless steel (precision casting) double chamber, cable entry M20 x 1.5 Stainless steel (precision casting) double chamber, cable entry ½ NPT
Storing raw and finished products
In crude oil processing, the storage of raw and finished products is an important factor for smooth, continuous production. Crude oil is delivered via ship or pipeline and stored in large tanks for later processing. The products of distillation are stored and held ready for shipment in tanks of varying dimensions. Measurement here requires very high accuracy.
In the past, mainly calibratable measuring devices were implemented for level measurement. For small and mid-sized tanks, the present trend is to avoid such expensive, highmaintenance measuring systems, because products are now usually measured by calibratable flow meters while being moved.
Simple contactless measurement with VEGAPULS 62
The radar sensor VEGAPULS 62 is suitable for level measurement especially in small and mid-size refnery vessels. Being small and light, the sensor can be mounted without difculty in an existing mounting boss, or integrated into a manhole.
With an accuracy of 3 mm, the sensor is ideal for inventory tank management and can easily be coupled with superordinate systems. Through the use of a temperature adapter, process temperatures up to 200 °C can be realised. That enables measurement of highly viscous distillation products such as lubricating oil or bitumen. VEGAPULS 62 has also proven itself very well as overfll protection in foating roof vessels.
VEGAFLEX 61 – using existing standpipes with new technology
Until now, mechanical measuring systems such as float gauges or displacers were often implemented. To guarantee precise measuring results, such devices are used mainly in standpipes. Due to the large equalisation holes in the pipes, it is often impossible to replace existing systems with free radiating radar sensors – the holes cause interfering reflections. This is a situation in which the guided microwave device provides a simple, as well as reliable, solution for level measurement. When the sensor is mounted in the center of the existing standpipe, a coaxial measuring system with optimal signal transmission is created. The result is high accuracy and dependability, without large expenditures for installation and setup.
Reliable overfill protection – VEGASWING 63
In principle, a continuous measuring system, such as e.g. radar, can be implemented for overfill protection. However, as a completely different measuring principle, the vibrating level switch VEGASWING 63 provides additional safety. Independent of product characteristics, the sensor reliably detects the threshold level and thus ensures a high degree of plant safety. The annual instrument check is carried out quickly and reliably with a simple push of a button on the instrument. VEGASWING 63 is ideally suited for leakage monitoring in tank enclosures.
Monitoring the charging of the blast furnace
To make sure the batch and the coke layer are distributed as optimally as possible, a measurement of the level is required. Because of the extremely harsh operating conditions in the blast furnace, heavy mechanical plumb line systems were often used previously. These had massive weights on chains that were lowered down onto the filling surface, thus measuring the distance. Modern radar sensors like VEGAPULS 68 solve this measurement problem much more elegantly.
Level measurement with VEGAPULS 68
Unaffected by dust, material compositions and high temperatures, VEGAPULS 68 delivers important information on the charging process in the blast furnace. Depending on the size of the sensor antenna, either broad areas or limited spots on the surface can be covered. Through the use of several sensors, the surface profile in the blast furnace can be systematically analysed. The radar instruments do not affect one another in the process. Thanks to its robust construction VEGAPULS 68 easily withstands the tough requiremens of the blast furnace environment. Moreover, by mounting the sensor on a suitable slide valve, it can be separated from the process anytime during operation.
Tapping the blast furnace
After the blast furnace has been tapped, the raw iron flows into pan or torpedo cars and is taken to the foundry or to the converter for further processing. Measuring the contents of the steel pans certainly belongs to the most difficult measurement tasks in the steelworks. The very high temperatures of over 1400 °C (2552 °F) and the extreme dust and steam generation during the filling process place heavy demands on the sensors. Understandably, only a contactless measuring technique can perform this task.
Level measurement in the steel pan with VEGAPULS 62
Since microwaves are not impaired by extremely high temperatures, VEGAPULS 62 is particularly well suited for this measurement task. Due to its high measuring rate and precision, it measures the contents of the steel pans with to take place even through the relatively small openings in the torpedo car, even during filling. A rinsing air connection makes sure that the antenna system stays clean during the intense shower of sparks and generation of dust that occurs when the pan is filled. Under cramped conditions, angled antenna extensions allow the sensors to be optimally located and the electronics mounted in protected surroundings.
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Last revised - December 30, 2005