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Level Measurement
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Have
a question on or need to purchase quality Level Instrumentation? Our
Sponsors Austral
Powerflo Solutions
are Experts in this area!
Contact
them here.
Just Scroll down to get to some great technical data on Level Instrumentation
3.10
Applications
Magnetrol have a huge library
of level applications which detail possible level measurement solutions - so
if you need help in this regard just hit
this link.
Capacitance
RF
Capacitance- The basics-thanks to our sponsors Austral
Powerflo Solutions and Magnetrol
Other Links
RF/Capacitance
Level Instrumentation-from omega.com
Displacer
Electronic
Displacer Transmitter Liquid Level Measurement Basics - A
good introduction from Magnetrol.
Displacer
switch operation - This is based upon simple buoyancy,
whereby a spring is loaded with weighted displacers which are heavier than the
liquid-from Magnetrol.
3.10
Dont
take the Risk - Is your Bulk Liquid Storage Tank Protected?-
Do you have bulk liquid storage tanks containing petroleum
products, ammonia, caustic chemicals, acids, ethanol, bitumen, pharmaceuticals,
beverages, tallow where overflow could occur. This article describes how an high
integrity, independent level switch, preferably of different technology to that
used for the tank gauging system, is required to monitor any failure of the auto
tank gauging system and shut down product transfers -thanks to our
sponsor Austral
Powerflo Solutions
Float/Magnetic
The Following technical information is compliments
of our sponsors Austral Powerflo
Solutions and Magnetrol
Magnetic
Level Indicators - The Next Generation
-
This unit incorporates Magnetrol’s advanced
Eclipse guided wave radar technology with the time
proven and time tested magnetic level indicator. To
date almost 10,000 Eclipse transmitters are working
throughout the world in tough measuring
applications, with most of those being the highly
efficient coaxial probe type. The primary benefit is
that Eclipse does not depend on the MLI float for operation,
as does a magnetostrictive transmitter. Redundant
visual indication and a 4-20 mA signal in
one instrument!
Float-
Details of float measurement techniques explained
Atlas
MLI vs. Gage Glasses
Evolution
of Magnetic Level Indicators
Replacing
DP Transmitters with Magnetic Level Indicators
MLI
Branch Connection Comparison
- Full-Bore / Full Penetration vs. Extruded Tee - This
application note provides a comparison of Orion’s full-bore/full
penetration (conventional) branch connections and extruded
tee branch connections as used on Magnetic Level
Indicators
External Caged
Floats- the basics
Float
Level Switches - the basics
Magnetic
Level Indicators- the basics
Other Links
Typical Specific
Gravities- from KTek
Resistive Magnetic Level for LPG tanks
- Thanks to Bintech
New
Improvements to Magnetic Level Gauge Technology Yield Increased Control,
Accuracy, Safety and Reliability for Plants that Process and Store Fluids
Thanks to automation.com
Radar
The Following technical information is compliments
of our sponsors Austral Powerflo
Solutions and Magnetrol
Choosing
the Right Guided Wave Radar Product -Kevin
Martyn,
Eclipse®
GWR vs. RF Capacitance - Boyce
Carsella -Is it time to replace your troublesome RF
Capacitance/Admittance Liquid Level Transmitters?
Non-Contact
Radar Measurement - An
examination of the various types - Kevin Martyn
Radar/Magnetic-
This unit incorporates Magnetrol’s
advanced Eclipse guided wave radar technology with
the time proven and time tested magnetic level
indicator.
Comparison
of Guided Wave Radar against other level Measurement Technologies-
This is a neat comparison tool
Guided
Wave Radar -the basics
Pulse
Burst Radar - The basics
Replacing
Old Technology - Revitalising level measurement accuracy
at a Soviet-era plant
Sanitary
Liquid Level Measurement - Drug-makers are now choosing
solid-state, non-mechanical devices that deliver higher accuracy, require less
frequent calibration, offer enhanced validation schemes, and are installed in
such a way that an instrument failure won’t compromise process uptime or
derail a batch in process.
Gauge
Your Level Instrumentation - Keith Larson - Technology
advances and downtime avoidance steer drug makers toward top-mount,
non-intrusive methods for continuous liquid level measurement.
Level
Indicators Reach New Heights - Exactly how much is
in there? It’s an easy question if you can see into a tank, but what if you’re
basically blind, or your tanks must be sealed? Sure, traditional solutions may
work for awhile, but they’re historically hard to maintain and sometimes lack
accuracy.
Radar
Level Gauges - Frequently Asked Questions - Bob Botwinski
Pulsar
Radar Level Up to the Challenge at Chemical Plant -
This facility offered numerous challenging level measurement applications,
including overfill and spill protection requirements. This is a large 7.0 MB
download.
Upgrading
Level Instrumentation - Field Upgrades aren't always as easy as 1, 2, 3 -
Walt Boyes - Control Magazine
Other Links
Innovation
in Level Measurement - End-of-Probe Algorithm - From automation.com
Guided
Wave Radar Transmitters:Meeting the Challenge for Level-Detection Under Harsh
Conditions- From automation.com
Ultrasonic
The Following technical information is
compliments of our sponsors Austral
Powerflo Solutions and Magnetrol
Principal
of operation
Ultrasonic
Contact - The basics
Ultrasonic
Non-Contact - The basics
3.10Flexibility, Powerful Performance from Magnetrol Ultrasonic
- Magnetrol’s new Echotel Model 355 Transmitter Can Handle
Applications That Were Unthinkable Just a Few Years Ago - As advances in digital
signal processing and low-power operation circuits make their way into the
design of field instruments, ultrasonic level transmitters have gotten smarter
and more effective. Thanks to www.controlglobal.com
Other Links
Sound
Advice - The measurement of level and flow is
8.10
No
Contact Means Ultra Level Measurement
- In level-measuring applications where it’s undesirable to have contact
of the measuring instrument with the liquid in the process, a sonic or
ultrasonic device may be an option. These types of level-measurement instruments
really measure the distance from one point in the vessel (usually a reference
point) to the level interface with another fluid. The general operating
principle of both sonic and ultrasonic devices is similar - from ISA and InTech.
Tapping Point Blockage Tools
Tapping
Point Blockage- Automatic Cleaning tool, see the
advantages of this advanced technology on the level
applications page. This tool has the potential to save big $$ in production
downtime, utilities (purge) use and above all has the potential to improve
safety.
Thermal Dispersion
Thermal
Dispersion -The basics, thanks to
our sponsors Austral Powerflo
Solutions and Magnetrol
General Level Theory
Level
Technology Comparison - This is a very comprehensive
table- thanks to
our sponsors Austral Powerflo
Solutions and Magnetrol
Taking
The Safe And Easy Approach - A tune up of your instrument practices
- Want to make your process instrumentation installations safer, more reliable,
and easier to use? Then read on for a few insiders tips- thanks to
our sponsors Austral Powerflo
Solutions and Magnetrol
Improving Differential Pressure Diaphragm Seal
Other Links
Level
Measurement Information Notes- Inx Inc
Level
Calibration Notes - Inx Inc
Level
Overview - a comparison of technologies -(supplied by Able Instruments and
Controls Limited UK)
The
Principles of Level Measurement - Gabor Vass, Princo
Instruments, Inc and sensorsmag.com
Level
Measurement selection Criteria - from omega.com
Liquid
Level Measurement-from APCS
Water
Level Accuracy and Correcting for Errors
due to Gravitational Acceleration and Liquid Density
- Ronny D. Harris, Ph.D -from In-Situ Inc
Vibrating Switches
Vibrating
Switches - The basics - thanks
to our sponsors
Austral Powerflo Solutions and Magnetrol
Boiler Level Control
Boiler
Drum Level Transmitter Calibration
- Steam Drum Level is both a critical
and difficult measurement to make. Control of the water level in the drum
must
be precise.
Thanks to Emerson Process Management.
All
in One Glass - Alternate approach to gage-glass maintenances leads to more
accurate drum level measurements - Dale P. Evely - Southern Company, a producer
of electricity, fiber optics, and wireless communications, developed an
alternate approach to address gage glass maintenance issues as well as
measurement uncertainties associated with water-column-type measurements - from ISA
and InTech
Boiling
water is easy as one, two, three, four according to David W. Spitzer
There’s more to boiler level control than measuring level and adjusting a
feedwater valve. Improved measurements and inverse response are just a few of
the influences on operating boilers in a reliable manner. Thanks to
ControlGlobal.com
Boiler
Drum Level Measurement and Control -This paper focuses on the effects of
boiler drum level and feedwater control as a means of energy savings by
thermal/mass balancing the boiler. It also discusses the effects of steam
drum pressure and feedwater temperature on the overall efficiency of the boiler.
From David C. Farthing and Federal Corporation
Bubble Tube
Canal
Flow Measurement Using a Bubbler Water Level Sensor - From the US Government
Hydraulics Lab
More details on Bubbler Tubes can be found in the General Level Theory Section
above.
Gauge Glass
All
in One Glass - Alternate approach to gage-glass
maintenances leads to more accurate drum level measurements - Dale P. Evely -
Southern Company, a producer of electricity, fiber optics, and wireless
communications, developed an alternate approach to address gage glass
maintenance issues as well as measurement uncertainties associated with
water-column-type measurements - from ISA
and InTech
Hydrostatic (Head Pressure)
The following links are provided with thanks to our sponsors Emerson
Process Management
Level
Measurement - Transmitters with Seals -Transmitters
with remote seals allow the transmitter
to be removed from direct contact with the
process fluid.
Tank
Level Measurement Capabilities - from Viatran Corporation and dynisco.com
Multivariable
approach to liquid level
-Density-compensated leveling eliminates nearly all error
- from InTech
Laser
Comprehensive Page on Laser Level - Thanks to our sponsor
ZEDFLO.
Nucleonic
Radiation
Based Level Measurement - from www.omega.com
Penetrating pulse technology
Principals
of Penetrating Pulse Technology- From HiTech-A safe,
economical, non-contact, non-invasive, “through the wall” digital technology
for accurate level measurement -Leif Lindvall,
Profile Concepts
Profile
Concepts -These are relatively new very accurate
techniques with particular relevence to the oil and gas industry
Technology
associated with profiler level systems
Radio Frequency
RF
Level Controls - The basics-thanks to our sponsors Austral
Powerflo Solutions and Magnetrol
RF
Level Measurement in Lined Vessels with Grounded Shell - from www.omega.com
Dielectric
Constants.htm from Ktek
Sight
Glasses
Are
You Gambling with Your Sightglass? - Selection Strategies for When Failure
Is Not an Option - Andrew Obertanec -Sightglasses are
sometimes called “the weakest link” in a processing system because of the
fragility of the glass. Actually, that’s not necessarily true. A sightglass
need not be a weak link in a processing system because glass, when uniquely
designed, is not necessarily fragile. Thanks to flowcontrolnetwork.com.
Technical
Information and Guidelines for the Specification, Installation and Maintenance
of Sight Glasses in Chemical and Pharmaceutical Processing Plants - This
illustrated "Chemical and Pharmaceutical Sight Glass Application
Handbook" spans the full scope of the subject from descriptions of common
glass formulations to design factors, to a step-by-step checklist for
installation and maintenance. From L.J. Star Inc - You will have to register to
get a copy.
Critical
Standards for Specifying Sight Glasses - Sight glasses are highly engineered
products. Although brands look alike, differences in their specs have tremendous
importance for worker safety, sanitary processes, and maintenance costs. From
L.J. Star Inc.
Mechanically
Prestessed Gas/Steel Sight Windows Resist Pressure and Impact Failure - An
article from Chemical equipment and L.J.
Star Inc.
On-line
engineering tutorial on sight glass technology as it applies to chemical
processing and pharmaceutical processing. This free webinar begins with an
overview of the essential aspects of glass, noting the various formulations used
in chemical, food and pharmaceutical process observation equipment.
Concentrating on sight glass selection, installation, and proper maintenance,
the webinar explains how to safely and effectively use sight glasses in process
applications ranging from standard lines to exceptionally demanding applications
with high temperature, high pressure, and sanitary requirements.
Standards for Tank Gauging
Standards
for Tank Gauging - Some of the reference standards used for liquid level or
mass tank gauging worldwide - thanks to Gauging Systems Inc
The
Art of Tank Gauging - This excellent 26 page technical
reference from Enraf gives an excellent overview
