"An ounce of prevention is worth a pound of cure", particularly when dealing with corrosion and it's effects on process equipment. Production downtime, safety concerns, environmental damage and personnel health all outweigh the obvious repair and replacement cost of the damaged equipment. All taken, the annual costs due to corrosion are estimated in the process and power industries are estimated to be around $750 billion globally.
Exterior treatments, such as painting and specialized coatings provide satisfactory results to maintain structural integrity. However, internal protection of process equipment requires a different approach. Building equipment from exotic materials which are immune from corrosion exceed any practical concept of reasonable cost. Another, much more reasonable approach is corrosion protection based on chemical treatment.
This guide, courtesy of Mettler-Toledo Process Analytics shows you the role in-line analytics play in keeping corrosion under control and avoiding unnecessary chemicals consumption in chemical plants, refineries, power and Cogen facilities.
Your local Process Analytics specialist can help you select the best equipment and strategy. Their experience and knowledge will save you time, money, and ensure quality.
An informative and educational resource specializing in process control instrumentation, analytical instruments, and related industrial equipment. Content includes technology basics, how-to's, new product developments, and application notes. Blog is courtesy of Alliance Technical Sales, a leading Manufacturers' Rep headquartered in Clarendon Hills, IL and serving customers in Illinois, Indiana, Iowa, Michigan and Wisconsin.
Showing posts with label Wisconsin. Show all posts
Showing posts with label Wisconsin. Show all posts
Learn How a pH Sensor Works
pH Sensor (Mettler) |
What is pH measurement?
pH (potential of hydrogen) is a figure used to express the acidity or alkalinity of a solution on a logarithmic scale. On this scale 7 is neutral; lower values are more acidic and higher values are more alkaline, with a maximum measurement of 14. In process applications, pH is generally measured with an inline pH probe, the most common being the glass combination electrode. Additionally, an inline pH probe generally requires a process adaption, cable and transmitter.
How does a pH probe work?
A typical combination pH probe is made up of two separate electrodes built into one, a pH sensing electrode, and a reference electrode. In the simplest terms, a pH sensing electrode uses a special pH sensing glass membrane. H+ ions permeate the membrane creating a charge. The potential between the two electrodes is the measurement of hydrogen ions in the solution, giving the measure of pH. For more details, download the free pH Theory Guide.
What is the difference between a pH probe, a pH sensor and a pH electrode?
Absolutely nothing! The three terms are used interchangeably in the industry. They can be used for probes that are used in-process or in laboratory measurement. You may also hear the term "pH meter". This can be used for a piece of laboratory equipment, or the term pH meter can also be used to mean the combination of an inline pH probe, cable and transmitter.
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Alliance Adds Thornton to Process Analytical Instrument Offering
Alliance Technical Sales, experienced provider of process analytical solutions throughout many industries, has added the Thornton brand of instruments to expand its offering of Mettler Toledo analytical products. Thornton specializes in on-line liquid process measurement solutions for pure and ultrapure water applications. The product line includes instrumentation and sensors providing high quality measurement of conductivity/resistivity, TOC, pH, ORP, dissolved oxygen, dissolved ozone, sodium, silica and bioburden. The Thornton line complements and expands the extent of Mettler Toledo products already available from Alliance Technical Sales.
Share your fluid process analytical challenges with product application experts, combining your process knowledge and experience with their product application expertise to develop effective solutions.
Share your fluid process analytical challenges with product application experts, combining your process knowledge and experience with their product application expertise to develop effective solutions.
Combustion Control in Gas Turbines
Proper inlet air control can boost gas turbine efficiency |
Vaisala, a globally recognized leader in the measurement of temperature and humidity, was authored a white paper application note that explains how the temperature and humidity of inlet air can contribute to combustion efficiency, as well as providing recommendations for measuring these parameters in gas turbine applications.
The white paper is included below. Share your process measurement requirements and challenges with application experts. Combine your process knowledge with their product application expertise to deliver effective solutions.
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Close Temperature Control of a Process Fluid Flow
Temperature sensor is one component of a successful temperature control system Courtesy Smart Sensors, Inc. |
Let's narrow the application range to non-flammable flowing fluids that require elevated temperatures. In the interest of clarity, this illustration is presented without any complicating factors that may be encountered in actual practice. Much of what is presented here, however, will apply universally to other scenarios.
What are the considerations for specifying the right equipment?
KNOW YOUR FLOW
- Specific Heat - The amount of heat input required to increase the temperature of a mass unit of the media by one degree.
- Minimum Inlet Temperature - The lowest media temperature entering the process and requiring heating to a setpoint. Use the worst (coldest) case anticipated.
- Mass Flow Rate - An element in the calculation for total heat requirement. If the flow rate will vary, use the maximum anticipated flow.
- Maximum Required Outlet Temperature - Used with minimum inlet temperature in the calculation of the maximum heat input required.
SELECT SYSTEM COMPONENTS WITH PERFORMANCE TO MATCH THE PROJECT
- Heat Source - If temperature control with little deviation from a setpoint is your goal, electric heat will likely be your heating source of choice. It responds quickly to changes in a control signal and the output can be adjusted in very small increments to achieve a close balance between process heat requirement and actual heat input.
- Sensor - Sensor selection is critical to attaining close temperature control. There are many factors to consider, well beyond the scope of this article, but the ability of the sensor to rapidly detect small changes in media temperature is a key element of a successful project. Attention should be given to the sensor containment, or sheath, the mass of the materials surrounding the sensor that are part of the assembly, along with the accuracy of the sensor.
- Sensor Location - The location of the temperature sensor will be a key factor in control system performance. The sensing element should be placed where it will be exposed to the genuine process condition, avoiding effects of recently heated fluid that may have not completely mixed with the balance of the media. Locate too close to the heater and there may be anomalies caused by the heater. A sensor installed too distant from the heater may respond too slowly. Remember that the heating assembly, in whatever form it may take, is a source of disturbance to the process. It is important to detect the impact of the disturbance as early and accurately as possible.
- Controller - The controller should provide an output that is compatible with the heater power controller and have the capability to provide a continuously varying signal or one that can be very rapidly cycled. There are many other features that can be incorporated into the controller for alarms, display, and other useful functions. These have little bearing on the actual control of the process, but can provide useful information to the opeartor.
- Power Controller - A great advantage of electric heaters is their compatibility with very rapid cycling or other adjustments to their input power. A power controller that varies the total power to the heater in very small increments will allow for fine tuning the heat input to the process.
- Performance Monitoring - Depending upon the critical nature of the heating activity to overall process performance, it may be useful to monitor not only the media temperature, but aspects of heater or controller performance that indicate the devices are working. Knowing something is not working sooner, rather than later, is generally beneficial. Controllers usually have some sort of sensor failure notification built in. Heater operation can be monitored my measurement of the circuit current.
SAFETY CONSIDERATIONS
- High Fluid Temperature - An independent sensor can monitor process fluid temperature, with instrumentation providing an alert and limit controllers taking action if unexpected limits are reached.
- Heater Temperature - Monitoring the heater sheath temperature can provide warning of a number of failure conditions, such as low fluid flow, no fluid present, or power controller failure. A proper response activity should be automatically executed when unsafe or unanticipated conditions occur.
- Media Present - There are a number of ways to directly or indirectly determine whether media is present. The media, whether gaseous or liquid, is necessary to maintain an operational connection between the heater assembly and the sensor.
- Flow Present - Whether gaseous or liquid media, flow is necessary to keep most industrial heaters from burning out. Understand the limitations and operating requirements of the heating assembly employed and make sure those conditions are maintained.
- Heater Immersion - Heaters intended for immersion in liquid may have watt density ratings that will produce excessive or damaging element temperatures if operated in air. Strategic location of a temperature sensor may be sufficient to detect whether a portion of the heater assembly is operating in air. An automatic protective response should be provided in the control scheme for this condition.
Direct Insertion Gaseous Oxygen Sensor - No Sampling
Ingold 6800G insertion sensor for gaseous oxygen Courtesy Mettler Toledo |
There is more to be learned. Reach out to a product application specialist and share your O2 measurement challenges. Combine your process knowledge with their product application expertise to develop the best solutions.
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New Laser Level Transmitter Brings Application Advantages for Process Measurement
Jogler, manufacturer of level measurement instruments, has released the new Model LLT 1000 Laser Level Transmitter for industrial process measurement and control applications. The newly designed instrument provides continuous non-contact level measurement for process automation and inventory management across an array of industrial applications.
The laser level transmitter provides reliable measurement of solids or liquids, even clear liquids. Long measuring range, narrow beam, and high accuracy make the LLT 1000 suitable for application in silos, tanks, hoppers, chutes, and bunkers.
The data sheet below provides more detail on the new level measurement instrument. Share your level measurement requirements and challenges with a product application specialist, combing your process knowledge with their product expertise to develop effective solutions.
The laser level transmitter provides reliable measurement of solids or liquids, even clear liquids. Long measuring range, narrow beam, and high accuracy make the LLT 1000 suitable for application in silos, tanks, hoppers, chutes, and bunkers.
The data sheet below provides more detail on the new level measurement instrument. Share your level measurement requirements and challenges with a product application specialist, combing your process knowledge with their product expertise to develop effective solutions.
Magnetic Level Gauges Superior to Glass Level Indicators
Magnetic Level Gauge (courtesy of Jogler) |
Magnetic level gauges are designed with a float in a sealed tube, embedded with permanent magnets. As process level changes, the float rises and falls, and the magnets in the float couple with an external indicator. The indicator is completely isolated from the process.
The following video provides a brief overview of Jogler level products. Jogger is a Baton Rouge, Louisiana manufacturer of high quality magnetic level gauges, magnetostrictive transmitters, direct-reading level gauges with armored shield, sight flow indicators, specific gravity analyzers, point level switches and other accessories. Jogler products are custom designed to meet customer specifications and manufactured to applicable ASME B31.1 and B31.3 code requirements to ensure reliable operation and maintenance free design.
New Generation of Mettler Toledo M300 pH/ORP, Dissolved Oxygen, Conductivity, & Ozone Transmitters
M300 Process Transmitter |
The multi-parameter M300Process transmitter line for pH/ORP, dissolved oxygen, conductivity and ozone measurements offers exceptional measurement performance as well as excellent user ergonomics.
The high contrast black and white touchscreen together with the harmonized menu structure for all parameters, facilitates navigation and ensures easy and user friendly operation.
On-line diagnostics information allows you to schedule sensor maintenance or replacement. The clearly visible diagnostic information lets you know when it’s time to do maintenance or calibration of sensors equipped with Intelligent Sensor Management (ISM) technology.
The integrated USB interface allows you to use it for data logging or to store the configuration on a USB stick.
Second generation M300 transmitters are direct replacements to first generation products.
For more information, contact:
Alliance Technical Sales
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Phone: 630-321-9646
Fax: 630-321-9647
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Welcome to the Alliance Technical Sales Blog
We will be contributing weekly posts of information regarding process analyzers, measurement & control, fundamentals of process control, and will present interesting applications.
We hope up enjoy this site and make it a habit to check back each week.
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