Emerson Exchange 365
  • Blog

    • 141 posts
    • Updated 1 month ago
    • 12 Sep 2017

    Selecting the Right DP Level Device for the Temperature Conditions

    With the season in change from summer to autumn here in the northern hemisphere, let’s look at differential pressure (DP) level measurement performance at various temperature ranges and particularly at cold weather performance. This quick 2:35 YouTube video, DP Level Solutions Optimized for Cold Climates: Improved Response Time , highlights the importance of selecting the right technology and fill fluids depending...
    • 9 Aug 2017

    When you need to know more...

    One of our midstream energy customers in Colorado recently upgraded their Rosemount 2120 level switches to the brand new wired HART Rosemount 2140 level detector. Frustrated by the lack of information they were getting back from the level switches due to a lack of remote diagnostics functionality, the company wanted a smart device that would not just send an alarm in the event of an overfill, but would also alert in advance...
    • 8 Aug 2017

    Proof Testing Level Measurement Devices

    Safety instrumented systems (SIS) include the sensor(s), final control element(s) and logic solver(s) for each of the safety instrumented functions (SIFs) in the SIS. To verify the SIFs are performing the amount of risk reduction intended for their application, they must be periodically proof tested. PCN Europe magazine interviewed Emerson’s Teddy Tzegazeab on how proof testing has changed for SIFs with liquid...
    • 26 Jul 2017

    What good is a safety level measurement if you can’t trust it?

    What good is a safety level measurement if you can’t trust it? A coal fired power plant installed an electronic gauging system for both level indication and level alarms on their plant’s steam drums. The system was configured to give Hi and Hi-Hi alarms and to shut down the boiler in case of emergency. However, within two years of operation they experienced leaking electrodes, and some of these leaks then...
    • 13 Jul 2017

    Level Sensor Safety Proof Testing

    Backing up your computer or server is a waste of time if restoring the backup fails when you need it. Good practice is to test these backups on separate test systems periodically to make sure they restore properly. Similarly, safety instrumented systems (SISs) need to assure that each safety instrumented function (SIF)/safety loop does what it’s intended to do to bring the plant to a safe state in the event of a...
    • 30 Jun 2017

    Remote Partial Proof Testing Level Sensors

    For safety instrumented functions (SIFs), proof testing is the process of identifying undetected dangerous failures in the sensor, final control element and logic solver which comprise the SIF. Dangerous failures are those that could put the safety instrumented system (SIS) in a hazardous or fail-to-function state. If undetected, in the case of level measurements, this could lead to an overfill and spill, with potentially...
    • 28 Jun 2017

    Increasing safety through remote proof-testing

    The proof-testing of safety instrumented systems in liquid level measurement applications has traditionally relied on workers in the field. However, our latest technology advancements in modern smart devices is enabling this vital task to be performed remotely, bringing significant safety, efficiency and cost benefits. Read about it in our white paper here: http://bit.ly/2uiurFd
    • 27 Jun 2017

    Using Flushing/Drip/Calibration Rings in Pressure and Level Measurements

    If you work with pressure measurement instrumentation, you may have heard the phrases drip rings, flushing rings or calibration rings. These are used for pressure and differential pressure (DP) level measurement devices where diaphragm seals are used. I bring this up because I received an email recently that asked about these [edited and paraphrased to protect confidentiality]: Can you advise where in the Emerson...
    • 6 Jun 2017

    Continuous Floating Roof Tank Condition Monitoring

    Floating roofs are used on storage tanks to minimize vapor space between the top of the tank and the level of the liquid, typically a petroleum-based product, inside the tank. Per the External floating roof tank Wikipedia entry: The roof rises and falls with the liquid level in the tank. As opposed to a fixed roof tank there is no vapor space ( ullage ) in the floating roof tank (except for very low liquid level...
    • 1 Jun 2017

    Accurate Level Measurement for Efficient & Reliable Boiler Performance

    If you’re unfamiliar with the phrase “ heat rate ” used in the electrical power generation industry, it means the amount of heat energy in BTUs as input to the turbine generators divided by the amount of electricity generated in kilowatts. Accurate level measurement in the boiler drums and feedwater heaters is critical to optimize efficiency and run the turbines reliably over time. Matt Brummer Level...
    • 28 Mar 2017

    Reducing maintenance and improving safety and reliability on supercritical steam lines

    The Mobrey Hydratect 2462 Water and Steam Detection System is the modern equivalent to float level switches and is suitable for process conditions of 4350 psi / 300 bar and 1040° F / 560°C. It is used on safety critical applications to detect the unwanted presence of water in steam, or the water level within a steam drum. A new Emerson case study details a typical application for the Mobrey Hydratect 2462. The...
    • 22 Mar 2017

    Level Switch Diagnostics for Remote Proof Testing and Instrument Health

    Many of the “things” in the Industrial Internet of Things are the sensors that measure not only operating, but also safety-, reliability- and efficiency-related parameters from a manufacturing and production facility. In a Process Industry Informer article, Enhanced Diagnostics Help To Ensure Reliable Level Monitoring , Emerson’s Marianne Williams shares how technology advancements in vibrating fork...
    • 21 Mar 2017

    Remote and Continuous Tank Floating Roof Monitoring

    As oil & gas supplies continue to exceed demand and the need to store crude oil, natural gas liquids and other petroleum-based products increases, storage tanks remain critical elements in the global supply chain. In a Tank Storage magazine article, Stay Afloat Using Radar Technology , Emerson’s Ulf Johannesson describes how radar technology is used to improve safe and reliable operation on storage tanks...
    • 21 Feb 2017

    Solving stringent insurer safety requirements

    A waste treatment specialist company in France was using differential pressure (DP) transmitters to measure and control the level within their two steam drums. However, after a recent review, the plant’s insurers were concerned that if the DCS was to fail, the DP measurement would be lost and there would be no way of knowing the level within the steam drum. This could lead to the steam drum running dry, or rising...
    • 7 Feb 2017

    Level measurement in challenging applications

    When a multinational energy company needed redundant level measurement for their depropanizer tower tray measurement, they chose the Rosemount 5300 Guided Wave Radar due to its reliability and stability in their challenging application. Read more here: http://bit.ly/2kgn5xk
    • 2 Feb 2017

    Remote proof-testing and advanced diagnostics with the new Rosemount wired HART level detector

    In response to our customers’ needs we have launched the world’s first wired HART vibrating fork level detector. The Rosemount™ 2140 features remote proof-testing capability and advanced diagnostics to help improve safety and increase process availability. Designed for ease-of-use the device provides reliable level detection while helping increase safety and efficiency of both plant and workers. Read...
    • 4 Jan 2017

    Reliable Level Measurement for Marine Vessel Tanks

    Measure tank levels can be challenging based on many factors including liquid composition, tank geometry, fill/empty rates, etc. And, if measuring levels on marine vessel tanks, there is added complexity with this non-stationary environment. I saw a LinkedIn post from Emerson’s Bert Konings about the complexities of level measurements in marine environments. In it, he pointed to this 5:26 YouTube video, Reliability...
    • 13 Dec 2016

    Solids Level Measurement Technology Selection Considerations

    Solids, unlike liquids, can have an uneven surface, making level measurement very difficult. In a Control Engineering magazine article, How to choose the right level instrument for applications , Emerson’s Lydia Miller shares tips on selecting the right level measurement technology for your application. Three primary factors you must consider include: Specific material characteristics Installation considerations...
    • 14 Oct 2016

    Non-Contacting Radar Level Measurement Frequency Tradeoffs

    Microwaves have many uses including communications, navigation, radar, radio astronomy, heating and power, and spectroscopy to name a few. For instrumentation and automation, radar level measurement works by emitting microwaves to measure distance. The first radar level measurement system was installed on a commercial oil tanker in 1976. Today, the technology has advanced to measure levels in tanks and vessels with...
    • 11 Oct 2016

    Radar frequencies: dispelling the myths

    Radar level transmitters on the market use different microwave frequencies – so which one is best? Laws of physics make “the best choice” vary depending on specific application challenges. Read more about the pros and cons of the various microwave frequencies from a level measurement perspective in our new white paper. http://bit.ly/radarfrequenciesNEW
    • 29 Aug 2016

    Measuring Cement Storage Silo Level and Volume Reliably

    The cement-making process involves quarrying raw materials such as limestone, sand and clay and then crushing these materials and others into small pieces in a series of stages. Rotary cement kilns heat these materials along other materials such as iron ore or fly ash. The high heat removes elements that are turned into gasses and the materials left are cooled and ground up with small amounts of gypsum and limestone added...
    • 18 Aug 2016

    Avoiding Corrosion while Increasing Urea Production

    Author: James Gremillion One of the key problems urea plants face is corrosion. The corrosion problem rests with one chemical produced by the urea process, ammonium carbamate . Ammonium carbamate is produced by reacting ammonia and carbon dioxide at high pressures (up to 200 bar ) in a special reactor. The urea reactor is a reactor vessel inside a protective shell. Should there be a leak in the reactor, the shell can...
    • 19 Jul 2016

    Guided Wave Radar Level Measurement in Vessel Bypass Chambers

    Accurately measuring levels in vessels is important in many aspects—safety, efficiency, reliability and availability to name a few. Mechanical level measurement devices historically have been failure prone and have required regular maintenance. Guided wave radar (GWR) technology avoids the problems with associated with mechanical devices, but is affected by obstructions in the vessel such as agitators, heat exchangers...
    • 29 Jun 2016

    Improving Safe Operations with Wireless Vibrating Fork Level Switches

    Level measurements can be some of the most important measurements for the safe operations of applications such as tank farms, boilers, pump control and more. Level measurement is a key part of monitoring and control strategies as well as safety instrumented functions. In a Process Worldwide article, How Wireless Vibrating Fork Frequency Monitoring Improves Process Safety , Emerson’s Marianne Williams describes...
    • 14 Jun 2016

    Simplified level measurement - combined chambers and guided wave radar help ensure reliability and accuracy

    Chambers enable guided wave radar (GWR) to measure level in vessels that have restrictions such as agitators, but correct equipment selection and installation is essential to ensure reliable and accurate measurements. Thomas Rundqvist explains how combined chamber/GWR units provide a pre-assembled and ready-to-install solution that simplifies level instrumentation commissioning. Read the article here: http://origin.misc...