Pulse Radar for Level
Technologies, Solutions, and Applications
Pulse Radar for Level
Contents
2
Leadership in Pulse Radar Technology
3
Principle of Operation
4
Models and Versions
5
Pulse Radar in the plics System
8
Application Areas
10
Setup and Adjustment
14
Leadership in
Pulse Radar Technology
When it comes to measuring the level of process and storage materials, the VEGAPULS 60 series
of through-air radar devices represents the most advanced technology available. The VEGAPULS
overcomes difficult environmental conditions, offering superior measurement reliability and accuracy.
With the most complete line of radar sensors on the market, VEGA sets a new standard for radar in
continuous level measurement.
Advanced Design & Development
Why Use Pulse Radar?
As the inventors of pulse measurement technology, twowire, loop-powered radar, and the first through-air radar
gauge for solids applications, VEGA has a strong tradition
of product development and innovation. The flexibility of
VEGA’s plics® technology provides a variety of antenna
styles and two different emitting frequencies, chosen
based on application requirements. This platform for all
VEGA-designed instruments makes plics measurement
technologies easy to use. With sensors that offer reliable
measurement using through-air radar, and construction
based on the of plics principle, VEGA continues to lead the
way in solving difficult and important applications.
Pulse radar is an ideal replacement technology for
pressure transmitters and DP cells that constantly require
zero-point recalibration. By utilizing electromagnetic
microwave pulses, VEGAPULS radar instrumentation is able
to provide accuracy up to 2 mm! In addition, the instruments
will not need recalibration after initial configuration and
will not experience zero point drift or fluctuations due to
change in specific gravity, temperature, or pressure. This
translates into less time spent on setup, maintenance, and
troubleshooting, as well as a worry-free installation that will
perform beyond expectation.
Certifications
Pulse radar instrumentation is designed for certification
compliance with the following programs:
▪▪
▪▪
▪▪
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ATEX Standard
CSA
FM Standard
GOST-R Standard
SIL2
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IECEx
WHG
3A
FDA
ABS
3
Principle of Operation
Radar technology is non-contact, making it ideal for many continuous level measurement
applications. The VEGAPULS quickly evaluates signals and dynamically suppresses false echoes to
ensure the accuracy of its level reporting. A large measurement memory and the ability to account
for signal attenuation due to buildup supports the reliability of the technology.
Pulse
The sensor transmits energy in the form of microwave pulses.
These pulses are directed toward the level surface, which
reflects the energy back to the antenna.
Target
The amount of energy that returns to the antenna depends
on the reflective properties of the material being measured.
Reflectivity is determined by two characteristics: conductivity
and dielectric constant (DK).
Return Time to Antenna
The transit time of the microwave pulse that returns to the
antenna is measured and used to calculate the distance.
Effect of Frequency
VEGA radar instruments operate in one of two frequency
bands: C-band or K-band. C-band instruments operates in
a range of approximately 6 GHz. This low frequency range
allows for a very powerful measurement when extreme
process conditions are present. K-band instruments operate
in a frequency range of approximately 26 GHz. The higher
frequency range allows the instrument to have a more focused
beam angle and smaller process connection sizes. It is perfect
for applications and vessels with moderate process conditions.
The choice between these frequencies gives VEGA the ability
to customize a radar system to each application.
4
K-Band Models & Versions
VEGAPULS 61
Pulse radar sensor for level measurement of liquids
▪▪ SIL2 qualified; standard version
▪▪ Output signals include 4 … 20 mA/HART, Profibus PA, or Foundation Fieldbus
▪▪ Process connections include 1.5" NPT, plastic flanges, or mounting loop
Measuring Range: 0 … 115 ft (0 … 35 m)
Process Temperature: -40 … +176°F (-40 … +80°C)
Process Pressure:
-14 … +29 psi (-1 … +2 bar)
Antenna Type(s): PVDF encapsulated
Measuring Precision: ± 2 mm
VEGAPULS 62
Pulse radar sensor for level measurement of liquids under difficult conditions
▪▪ SIL2 qualified; standard version
▪▪ Output signals include 4 … 20 mA/HART, Profibus PA, or Foundation Fieldbus
▪▪ Process connections include NPT or ANSI flange
Measuring Range: 0 … 115 ft (0 … 35 m)
Process Temperature: -328 … +842°F (-200 … +450°C)
Process Pressure:
-14 … +2,320 psi (-1 … +160 bar)
Antenna Type(s): Horn, parabolic, integral stilling well
Measuring Precision: ± 2 mm
5
VEGAPULS 63
Pulse radar sensor for level measurement of liquids under sanitary or corrosive conditions
▪▪ SIL2 qualified; standard version
▪▪ Output signals include 4 … 20 mA/HART, Profibus PA, or Foundation Fieldbus
▪▪ Process connections include ANSI flange or sanitary tri-clamp
Measuring Range: 0 … 115 ft (0 … 35 m)
Process Temperature: -328 … +392°F (-200 … +200°C)
Process Pressure:
-14 … +232 psi (-1 … +16 bar)
Antenna Type(s): TFM-PTFE, PFA encapsulated, PVDF
Measuring Precision: ± 2 mm
VEGAPULS 67
Pulse radar sensor for level measurement of bulk solids
▪▪ SIL2 qualified; standard version
▪▪ Output signals include 4 … 20 mA/HART, Profibus PA, or Foundation Fieldbus
▪▪ Process connections include plastic flange or mounting loop
Measuring Range: 0 … 50 ft (0 … 15 m)
Process Temperature: -40 … +176°F (-40 … +80°C)
Process Pressure:
-14 … +29 psi (-1 … +2 bar)
Antenna Type(s): PVDF encapsulated
Measuring Precision: ± 2 mm
VEGAPULS 68
Pulse radar sensor for level measurement of bulk solids
▪▪ SIL2 qualified; standard version
▪▪ Output signals include 4 … 20 mA/HART, Profibus PA, or Foundation Fieldbus
▪▪ Process connections include ANSI flange, ANSI swivel flange, or NPT
Measuring Range: 0 … 246 ft (0 … 75 m)
Process Temperature: -328 … +842°F (-200 … +450°C)
Process Pressure:
-14 … +2,320 psi (-1 … +160 bar)
Antenna Type(s): Horn, parabolic
Measuring Precision: ± 2 mm
6
C-Band Models & Versions
VEGAPULS 65
Pulse radar sensor for level measurement of liquids with foam
▪▪ SIL2 qualified; standard version
▪▪ Output signals include 4 … 20 mA/HART, Profibus PA, or Foundation Fieldbus
▪▪ Process connections include 1.5" NPT or ANSI flange
Measuring Range: 0 … 115 ft (0 … 35 m)
Process Temperature: -40 … +302°F (-40 … +150°C)
Process Pressure:
-14 … +232 psi (-1 … +16 bar)
Antenna Type(s): PVDF/PTFE rod
Measuring Precision: ± 8 mm
VEGAPULS 66
Pulse radar sensor for level measurement of liquids with strongly agitated media
▪▪ SIL2 qualified; standard version
▪▪ Output signals include 4 … 20 mA/HART, Profibus PA, or Foundation Fieldbus
▪▪ Process connections include ANSI flange
Measuring Range: 0 … 115 ft (0 … 35 m)
Process Temperature: -76 … +752°F (-60 … +400°C)
Process Pressure:
-14 … +2,320 psi (-1 … +160 bar)
Antenna Type(s): Horn, integral stilling well
Measuring Precision: ± 8 mm
7
Pulse Radar in the plics System
Indicating &
Adjustment Module
PLICSCOM
VEGACONNECT
4 … 20 mA/
HART
Profibus PA
Foundation
Fieldbus
Plastic
Stainless Steel
Aluminum
Plastic
Dual Chamber
Stainless Steel
Dual Chamber
Aluminum
Dual Chamber
Thread
Flange
Sanitary
Custom Design
Horn Antenna
Encapsulated
PVDF Antenna
Horn Antenna
(842°F)
Horn Antenna
(482°F)
Electronics
Housings
Process Fittings
Sensors
Parabolic
Antenna
8
Encapsulated
PTFE, PFA, or
PVDF Antenna
Trend-setting measurement technology evolves to meet the needs of people who use it. That is why we
developed plics —the world’s first modular product system for instrumentation. The modularity allows
for easy component selection to meet individual application requirements. Because every one of our
sensors is custom built from plics, the system fulfills the requirements of any industry and its
specific applications.
Simpler Planning with plics
The choice and combination of sensors, process fittings,
electronics, and housings simplifies instrument selection
and engineering. With plics, cost reduction starts right at the
planning stage.
Clear Advantages in Plant Construction
Short delivery times, simple wiring, and fast setup and
commissioning save the plant builder significant time
and costs. The configuration, wiring, and setup of VEGA
instruments are always the same, so a single experience
with the process is repeated with any plics measuring
principle and application at any time.
Assistance for the User
plics gives a convincing performance in daily use because
of its high operational reliability, simplified servicing, and
reduced spare part stocking through the use of many
identical components. The consistency of technology and
operation simplifies and accelerates work with different
plics instruments.
plics Advantages for Pulse Radar
As a plics device, a VEGA pulse radar sensor
utilizes all the advantages of the modular system:
▪▪ Two-wire/Loop-powered
▪▪ Top mounted for non-contact measurement of the
process material
▪▪ FCC approved for Part 15 use
▪▪ Flexible mounting includes NPT, ANSI flange, and
sanitary connections
▪▪ Easy-to-use programming module or computer
software makes setup simple and fast
▪▪ No recalibration
▪▪ Low maintenance due to no moving parts or
contact with the process material
▪▪ Hazardous area approval available
9
Application Areas
K-band radar utilize small antenna systems that have narrow beam angles. High accuracy and mounting
flexibility make the K-band VEGAPULS ideal for vessels with easy to moderate process conditions. For
long range measurements, measurement of low DK products, or measurement with difficult process
conditions such as foam, the high-sensitivity version of the K-band electronics is ideal.
Aggressive Products
Liquid Gas Measurement
Extremely toxic intermediate products often result from
chemical reactions and need to be stored under very
strict safety conditions. The non-contact radar measuring
principle makes it ideal for measuring chemically toxic
materials. The VEGAPULS 60 series offers numerous
options for measurement under aggressive conditions,
including all plastic chemically resistant parts, corrosionresistant metal alloys, and high temperature and pressure
designs.
Low dielectric liquefied gases found in petrochemical plants
often require a stilling well to make the measurement.
A stilling well focuses the radar signal of a VEGAPULS,
allowing it to see a good reflection from a low dielectric
constant (DK) material. Optional isolation ball valves are
possible with stilling wells and through-air radar.
▪▪ Construction materials provide the ability to measure in
extreme pressure and temperature ranges
▪▪ Ceramic process separation offers optimal resistance to
chemical diffusion
10
▪▪ Focused signal reliably measures products with low
dielectric values
▪▪ Multiple radar devices achieve redundancy with no risk
of crosstalk
“Radar is a versatile technology designed to measure in the most challenging applications. Success
comes by selecting the right VEGAPULS for the process conditions.”
Tank Farm Level Measurement
Food Mixing and Preparation Vessels
The radar sensor VEGAPULS 62 is ideal for level
measurement, in all size storage vessels. Small and light,
the sensor mounts easily in an existing mounting boss
or integrates into a manway. With an accuracy of 2 mm,
the sensor is ideal for tank inventory management and
integrates easily with control systems.
The VEGAPULS 63 radar sensor is ideal for reliable
level measurement of food products. The non-contact
measurement is not affected by density changes in the
process. The front-flush antenna allows optimal CIP and SIP
cleaning, is insensitive to high-pressure water jets, and is
not affected by thermal shock.
▪▪ Easy setup reduces commissioning time
▪▪ Mounting options allow for protection against overfill in
floating roof vessels
▪▪ Non-contact measurement is unaffected by pressure and
temperature fluctuations
▪▪ Absolute front-flush antenna withstands food industry
cleaning practices
▪▪ Available with sanitary tri-clamp connection
11
Application Areas
C-Band radar is a low frequency radar. C-Band radar is ideal for measurements in harsh process
conditions with severe agitation or mixing. It is also used for storage applications and vessels where
foam may be present.
Distillation Column
Digester Towers
In the past, displacer systems in bridles have been used
for level measurement in distillation columns. This system
is maintenance-intensive. Non-contact radar sensors like
the VEGAPULS 66 commonly replace displacers. Existing
bypass tubes can usually be used for the measurement, so
no mechanical modifications to the vessel are necessary.
Methane gas is created in the waste digestion process.
Thus, a measurement must be made under changing
gas concentrations and fluctuating pressure conditions.
The non-contact VEGAPULS 66 radar sensor is the ideal
solution for this measurement. Completely independent
of the process conditions and density of the waste water
sludge, it reliably detects the surface of the product. The
low C-band frequency makes the measurement, even during
periods of sudden foam generation that can occur in the
digester.
▪▪ Resistant materials allow for operation under extreme
process pressures and temperatures
▪▪ Mounting options retrofit to existing bypass tubes
▪▪ Reduces maintenance needs by operating without moving
parts or contact with the process material
12
“For hazardous areas, a variety of housings are available: intrinsically safe supply, integrated barrier
for pressure resistance, or encapsulated Ex-d version.”
Service Tanks on Ships
Gravel and Grit Mining
Cavities and inaccessible places on ships that are used as
tanks for drinking water, fuel, and ballast are reliably and
precisely measured by a sounding tube and through-air
radar sensor. The microwave pulses of the VEGAPULS 66
radar are guided through the tube and are unaffected by
vessel obstructions and sidewalls.
Due to the high mechanical forces and abrasion in certain
mining applications, level measurement techniques that
contact the medium are unsuitable. The VEGAPULS 68
non-contact radar was specifically developed for such
applications. Unaffected by dust, abrasion, condensation,
product moisture, and filling noise, the instrument reliably
measures in silos and bunkers up to 246 feet (75 m) high.
▪▪ Swiveling holder provides easy sounding
▪▪ Non-contact measurement is independent of product
characteristics and vessel form
▪▪ Easy setup reduces installation time
▪▪ Reliable radar technology measures through dust and
during filling
13
Setup and Adjustment
“With VEGA technology, any user can set up a measuring point exactly as the system requires.
Remote parameter adjustment with a control system is just as easy and flexible as setup at
the sensor.”
14
PLICSCOM – Multi-Function Ability
PC Adjustment with VEGACONNECT
The PLICSCOM indicating and adjustment module plugs
into any plics instrument on-demand. It functions as a
measured value indicator on the instrument and as a local
adjustment device. The structure of the adjustment menu
is clearly organized and makes setup and commissioning
easy. In addition, the status messages are displayed
directly on the screen. When an instrument is exchanged,
PLICSCOM ensures fast availability of the measuring
point — all sensor data is saved by pressing a key on the
PLICSCOM and later copied into the replacement sensor.
For increased setup versatility, the mobile ­VEGACONNECT
easily connects VEGA instruments to any PC through
the USB interface. The parameter adjustment of these
instruments is accomplished by PACTware adjustment
software and a DTM. VEGACONNECT also acts as a
universal HART modem for sensors of other manufacturers.
External Indicating and Adjustment
Setup with a HART Handheld
A HART Handheld is an additional tool that enables
on-site ­sensor parameter adjustment. To access the HART
parameters of a sensor, it ­connects to the sensor cable
through a minimum working ­resistance of 220 ohms.
An external indicating and adjustment unit ­with integrated
PLICSCOM can be connected to the sensor with a standard
cable up to 50 meters long. It allows setup of the measuring
point, even in difficult to access locations, and requires no
external power.
15
31424-US-110301
VEGA Americas, Inc.
4170 Rosslyn Drive
Cincinnati, OH 45209
USA
Toll Free +1 800 367 5383
Phone +1 513 272 0131
Fax
+1 513 272 0133
E-mailamericas@vega.com
Webwww.vega-americas.com
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