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Jim Cahill
22 Jun 2020
Low Dielectric Radar Level Measurement
Guided wave level measurement technology works by sending low-energy microwave pulses along a metal probe which is then reflected by the surfaces. The probe is in direct contact with the media and detects a level when reaching a media with a different dielectric constant. It calculates the distance to the surface, which is then subtracted from the total length to calculate the level. For applications with fluids with...
Jim Cahill
3 Mar 2020
Tips for Accurate DP Level Measurements
Nicole Meidl Differential pressure (DP) for liquid level measurement works by measuring the hydrostatic head pressure at the bottom of the vessel and the specific gravity of the liquid. The height of the liquid in inches is the pressure of the liquid column in inches of water divided by the specific gravity of the liquid. I share this as background for a Processing magazine article, Better ways to use differential...
Jim Cahill
11 Dec 2019
Liquid Level Measurement Automation Basics
Lydia Miller What is the purpose of your level measurement? If you know the answer to that I highly recommend an Intech article, How to measure liquid level in vessels , by Emerson’s Lydia Miller . This article is but one of a number of excellent learning articles in the International Society of Automation (ISA)’s Automation Basics series of articles. Lydia opens highlighting different purposes for level measurements...
Jim Cahill
11 Dec 2019
Liquid Level Measurement Automation Basics
Lydia Miller What is the purpose of your level measurement? If you know the answer to that I highly recommend an Intech article, How to measure liquid level in vessels , by Emerson’s Lydia Miller . This article is but one of a number of excellent learning articles in the International Society of Automation (ISA)’s Automation Basics series of articles. Lydia opens highlighting different purposes for level measurements...
Jim Cahill
5 Nov 2019
Frequency Modulation for Improved Radar Level Measurement
Ingemar Serneby For those that still listen to FM radio over the airwaves given our increasingly streaming digital world, you may know that the FM stands for “frequency modulation”. Information such as the music you hear on an FM music station is encoded in the radio signal through subtle changes in the frequency of the signal. In a Flow Control magazine article, How frequency modulation can improve effectiveness...
Jim Cahill
5 Nov 2019
Frequency Modulation for Improved Radar Level Measurement
Ingemar Serneby For those that still listen to FM radio over the airwaves given our increasingly streaming digital world, you may know that the FM stands for “frequency modulation”. Information such as the music you hear on an FM music station is encoded in the radio signal through subtle changes in the frequency of the signal. In a Flow Control magazine article, How frequency modulation can improve effectiveness...
Jim Cahill
22 Oct 2019
Successfully Applying Non-Contacting Radar in Black Liquor Mixing Tanks
In the Kraft pulping process, wood fibers are separated, and resinous materials removed, using an alkaline (typically sodium hydroxide and sodium sulfide) cooking liquor, also known as white liquor. This process converts wood into cellulosic pulp used in the papermaking process. This digesting process turns the white liquor into black liquor, which contains : …lignin fragments, carbohydrates from the breakdown of...
Jim Cahill
8 Oct 2019
Improving Floating Roof Tank Performance
Christoffer Hoffmann Bulk liquid storage terminals are a critical component in the energy industry supply chain between production and distribution. Floating roof tanks are commonly used to avoid having a vapor space or ullage between the liquid level and roof found in fixed-roof tanks. A Storage Terminals magazine article, Staying on the Radar , shared some thoughts from Emerson’s Christoffer Hoffmann on avoiding...
Jim Cahill
8 Oct 2019
Improving Floating Roof Tank Performance
Christoffer Hoffmann Bulk liquid storage terminals are a critical component in the energy industry supply chain between production and distribution. Floating roof tanks are commonly used to avoid having a vapor space or ullage between the liquid level and roof found in fixed-roof tanks. A Storage Terminals magazine article, Staying on the Radar , shared some thoughts from Emerson’s Christoffer Hoffmann on avoiding...
Jim Cahill
24 Sep 2019
Two-Wire FMCW Radar Level Transmitter Advantages
Christoffer Widahl and Jimmie Soderstrom presented The New Normal for Process Radar—The New Two-Wire FMCW [Frequency-Modulated Continuous Wave] Radars are Here!, at the 2019 Emerson Exchange conference. Jimmie opened with a question, “Why measure level?” It is to monitor that supplies are sufficient to keep processes running, control processes to run at maximum output and to control safety functions such as overfill...
Jim Cahill
24 Sep 2019
Two-Wire FMCW Radar Level Transmitter Advantages
Christoffer Widahl and Jimmie Soderstrom presented The New Normal for Process Radar—The New Two-Wire FMCW [Frequency-Modulated Continuous Wave] Radars are Here!, at the 2019 Emerson Exchange conference. Jimmie opened with a question, “Why measure level?” It is to monitor that supplies are sufficient to keep processes running, control processes to run at maximum output and to control safety functions such as overfill...
Jim Cahill
29 Aug 2019
Overcoming Citrus Processing Level Measurement Challenges
Don Parry Just imagine that you’re an operator in a facility that makes concentrated orange juice and the production process requires you to manually check the levels of large processing tanks in the freezing process conditions. Parkas and gloves are a part of your work attire. These were the conditions as told in an excellent story told in Processing magazine, Radar Level Measurement Improves Inventory Control for...
Jim Cahill
14 Aug 2019
How to Install a Rosemount Non-Contacting Radar Level Transmitter
Here’s a quick one-minute YouTube video, Rosemount 5408 How To – Mechanical Installation showing the mechanical installation of a Rosemount 5408 Non-Contacting Radar level transmitter. Not much to say other than it looks very straight forward. Visit the Non-Contacting Radar section on Emerson.com for more on this technology and applications to continuously measure levels in tanks and vessels. You can also...
Jim Cahill
14 Aug 2019
How to Install a Rosemount Non-Contacting Radar Level Transmitter
Here’s a quick one-minute YouTube video, Rosemount 5408 How To – Mechanical Installation showing the mechanical installation of a Rosemount 5408 Non-Contacting Radar level transmitter. Not much to say other than it looks very straight forward. Visit the Non-Contacting Radar section on Emerson.com for more on this technology and applications to continuously measure levels in tanks and vessels. You can also...
Jim Cahill
16 Jul 2019
Reducing Level Detector Proof Testing Complexity
Each safety instrumented function (SIF) including its sensor, logic solver and final control element must be periodically tested to make sure it will perform as designed in the event of a safety demand. These “proof tests” help to uncover and failure conditions which may have developed since the last proof test or safety demand. A new whitepaper, Reducing the Complexity of Proof-Testing with New Generation Point Level...
Jim Cahill
16 Jul 2019
Reducing Level Detector Proof Testing Complexity
Each safety instrumented function (SIF) including its sensor, logic solver and final control element must be periodically tested to make sure it will perform as designed in the event of a safety demand. These “proof tests” help to uncover and failure conditions which may have developed since the last proof test or safety demand. A new whitepaper, Reducing the Complexity of Proof-Testing with New Generation Point Level...
Jim Cahill
25 Jun 2019
Guided Wave Radar for Tight Boiler Steam Drum Level Control
Matthew Brummer Boiler steam drum level control is critical in electrical power generation. Too high a level can mean water aspirating into the steam lines and causing damage to the turbine generator blades downstream. Too low a level can cause the boiler to dry and overheat. In a Power magazine article, Controlling Boiler Level When Operating Conditions Change , Emerson’s Matthew Brummer compares different level...
Jim Cahill
24 Jun 2019
Measuring Sediment Buildup in Process Vessels and Tanks
Some processes, such as oil & gas production, not only have to measure liquid levels but sometimes must measure sediment levels that can come along in the production stream and settle in vessels and tanks. This quick, 2:38 “How To” YouTube video, How Does the Rosemount Sand Switch Functionality Work? , shows how to change the settings in a Rosemount 2140 vibrating fork level detector from measuring liquids, to measuring...
Jim Cahill
23 May 2019
Non-Contacting Radar Level Measurement in Pulp Mills
A pulp mill : …converts wood chips or other plant fibre source into a thick fibre board which can be shipped to a paper mill for further processing. Ingemar Serneby Level measurements can be challenging in pulp manufacturing process. In a Pulp-paperworld article, Radar Technology Overcomes the Toughest Level Measurement Challenges , Emerson’s Ingemar Serneby shares his expertise on how non-contacting radar level...
Jim Cahill
6 May 2019
Storage Tank Overfill Protection
Lydia Miller AnnCharlott Enberg Preventing overfill conditions in tanks and vessels is a job for safety instrumented systems across many industries. In a Flow Control article, A Systemic Approach to Storage Tank Overfill Protection , Emerson’s Lydia Miller and AnnCharlott Enberg describe the key components in a comprehensive tank management system to meet the safety requirements for the application. Lydia and AnnCharlott...
Jim Cahill
22 Apr 2019
Remote Proof Testing Safety Level Switches
One of the necessities in managing safety instrumented systems throughout the IEC 61511 safety lifecycle is to perform periodic proof tests on the components in a safety instrumented function to verify proper function. A short 2:44 YouTube video, How to Remotely Proof-Test the Rosemount 2140:SIS shows how this proof testing can be performed remotely for safety level switches to save time & costs and reduce risk. ...
Jim Cahill
2 Apr 2019
LNG Storage Tank Radar Level Measurement
Liquefied natural gas is methane with some ethane possibly mixed in cooled down to -162 degC (-260 degF) to transition the gas into a liquid state. It is liquefied : …for ease and safety of non-pressurized storage or transport. It takes up about 1/600th the volume of natural gas in the gaseous state… Håkan Jubel In a Tank Storage article, Radar Provides Precise Level Measurement in LNG Tank Gauging Systems , Emerson...
Jim Cahill
21 Mar 2019
Demonstrating Non-Contacting Radar Level Measurement
It’s been a struggle catching up after a busy CERAWeek last week and a Spring Break week, this week in Austin. Let’s close this short week with a look at one of the very accurate level measurement technologies—non-contacting radar. In this short 3+ minute YouTube video, Non-contacting Radar: Simple configuration with Rosemount 5408 , Emerson’s Jimmie Soderstrom contrasts non-contacting radar with guided wave radar technology...
Jim Cahill
21 Mar 2019
Demonstrating Non-Contacting Radar Level Measurement
It’s been a struggle catching up after a busy CERAWeek last week and a Spring Break week, this week in Austin. Let’s close this short week with a look at one of the very accurate level measurement technologies—non-contacting radar. In this short 3+ minute YouTube video, Non-contacting Radar: Simple configuration with Rosemount 5408 , Emerson’s Jimmie Soderstrom contrasts non-contacting radar with guided wave radar technology...
Deanna K Johnson
22 Feb 2019
How Guided Wave Radar Instruments Can Help a Refinery Make Accurate Level Measurements in a Corrosive Environment.
It’s always interesting to have a little historical trivia attached to our industries, and this article provides a good example: refineries started adding alkylation units during World War II to increase production of aviation gasoline for all those piston-engine aircraft. The process is still in use today, with a few unresolved challenges. Hydrofluoric acid (HF) alkylation is a very corrosive process, which Lydia...
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