Monday, July 16, 2018

Coriolis Mass Flow Meters

Coriolis Mass Flow Meters
Coriolis Mass Flow Meter (Yokogawa)
A Coriolis mass flow meter consists of a U-shaped tube that deflects or vibrates as the fluid flows through it. The operation of this type of mass flow meter is based on the conservation of angular momentum as it applies to the Coriolis acceleration of a fluid. Coriolis acceleration is that tangential force experienced when one walks radially outward on a rotating platform. The force is only experienced when one changes position in relation to the center of rotation.

Operating Principle

As fluid enters the U-shaped tube, it is forced to take on the vertical movement of the vibrating tube. When the tube is moving upward, the fluid flowing into the meter resists being forced up by pushing down on the tube. Having been forced upward, the fluid flowing out of the meter resists having its vertical motion decreased by pushing up on the tube. The two opposing forces on the tube cause it to twist. The amount of twist is directly proportional to the mass rate of fluid flowing through the tube.

Major Components and Operation

A mass flow meter consists of a vibrating U-shaped tube in which the Coriolis acceleration is created and measured. In place of the rotational motion described above, the inlet and outlet of the tube are held fixed while the tube is vibrated sinusoidally about an axis formed between the inlet and outlet, typically by a magnetic device located in the bend. In most devices, magnetic sensors located on each side of the flow tube measure the respective velocities, which change as the tube twists. Newer models have two U-shaped tubes to measure fluid flow.

Coriolis mass flow meters are generally used in the following liquid applications: harsh chemicals, low to medium viscosity, foods, slurries, and blending systems. Gas applications are somewhat limited since the density of low-pressure gases is usually too low to accurately operate the flow meter. Typically, thin walled tubes are used for gas applications. However, when applicable, the mass flow meter eliminates the need for pressure and temperature compensation and the hardware necessary to implement these functions.

For more information about Coriolis mass flow meters, contact Power Specialties by visiting or by calling (816) 353-6550.

Monday, July 2, 2018

Happy 4th of July from Power Specialties!

"The United States is the only country with a known birthday. All the rest began, they know not when, and grew into power, they know not how.... There is no "Republican," no "Democrat," on the Fourth of July, — all are Americans."

James Gillespie Blaine

Saturday, June 30, 2018

The MSA Ultima X5000 Gas Monitor

MSA Ultima X5000 Gas Monitor
The MSA ULTIMA® X5000 features a new design equipped with an Organic LED (OLED) display and bright status LED’s for extreme visibility. The gas monitor employs Green, Yellow and Red LED’s to signal normal, fault and alarm conditions.

Dual sensing technology doubles the sensing power with half of the footprint of a single gas transmitter. Sensors can be remotely mounted, mixed and matched to suit your gas detection needs.

Bluetooth wireless technology allows you to use your mobile device as an HMI screen and controller. The X/S Connect App is designed with high security standards and provides real-time information to your mobile device. Reduces setup time by at least 50%.

MSA’s patented XCell® sensors with TruCal® technology, extends calibration cycles up to 18 months. TruCal technology actively monitors the sensor integrity and compensates for environmental factors that cause regular electrochemical sensors to drift, allowing calibration cycles to be extended well beyond industry standards. TruCal can greatly reduce downtime and provides peace of mind.
(816) 353-6550

Sunday, June 24, 2018

Glossary of Technical Terms for Process Weighing

KIS Load Cell
KIS Load Cell (BLH Nobel)
BLH Nobel has been recognized as a leader in weighing technology, process weighing and force measurement. They design and deliver innovative, accurate industry-leading weighing and force measurement solutions and supply both standardized and custom systems and serve customers from a wide range of industries.

The following embedded document is an exhaustive compilation of technical terms used in process weighing, courtesy of BLH Nobel.

You can also download your own PDF version of the "Glossary of Technical Terms for Process Weighing" here.

Thursday, June 14, 2018

Pneumatic Vane Damper Drives for Boiler Flue Gas and Combustion Air: A Superior Alternative to Electric

Obsolete ID fan inlet damper drive.
Obsolete ID fan inlet
damper drive.
Pneumatic damper drives are excellent alternatives to electric drives because of speed, accuracy, and reliability. Pneumatic vane damper drives don't have gears or motor windings that slow down response or introduce slop. Pneumatic vane drives react to signal changes and produce movement instantaneously and repeatably.

In flue gas and combustion air applications, rapid response is critical for optimal efficiency, safety, and equipment longevity. In power plants, Rotork Type K damper drives provide a better solution for critical damper applications over electric drives.

Type K damper drive 'drop-in-place' replacement.
Type K damper drive
'drop-in-place' replacement.
Balanced-draft power generation boilers can experience very serious equipment failures if low pressure conditions exist inside the combustion chamber. Transients in boiler pressure can cause combustion complications leading to irregular heating of steam tubes, and in extreme situations, negative boiler pressure can collapse boiler walls and buckstays. There is a possibility for catastrophic failures (ruined boiler tubes, destroyed  refractory, boiler structural damage) leading to long shutdowns, lost production, and expensive re-construction.

Understanding the catastrophic possibilites, it is extremely important to provide consistent internal operating pressure environment for efficient and manageable combustion. ID (induced draft) fans on combustion boilers play a critical role in maintaining reliable boiler pressure. In turn, the ID fan inlet damper control system that regulates fan induced airflow and pressure need to be accurate, responsive, and reliable to assist in keeping boiler combustion chamber pressure fluctuations in check.

Type K damper driveRotork Type K 'PM Series' Pedestal-Mount TK-6 Damper Drives have proven themselves time and time again to be the best choice for these applications. Pneumatic vane drives deliver high torque at tested speeds of less than 3 seconds for a full 90-degree stroke. They offer drop-in-place retrofit to the existing damper drive footprint, plus smart positioner technology. The Type K Drives perform quickly and smoothly at full boiler pressure and damper load, and as required, fail to the fully closed position.

For use on boiler dampers, the years of maintenance-free operation, in thousands of successful installations world-wide, the data clearly demonstrates pneumatic drive's superiority over electric drives.

Finally, always discuss your damper drive application with an experienced applications engineer for best selection, optimal performance, and maximum safety.

Tuesday, May 29, 2018

Frac Truck Temperature Transmitters

Frac Truck Temperature Transmitters
Frac Truck
showing temperature
transmitter (REOTEMP)
Frac Trucks pump nitrogen gas into natural gas wells and oil wells to purge remaining fossil fuels that may be imbedded in well bores, slurries, and bedrock. The purged fuels can then be used for commercial use.

Frac Trucks require a variety of sensors to monitor internal components: liquid nitrogen tanks, heat exchangers (used to convert liquid nitrogen to gas), and pumps. Temperature sensors are especially critical on Frac Trucks, because they are used to ensure safe, efficient operations.

Download the PDF version of the "Frac Truck Temperature Transmitters" application note here.


The temperature sensors are subjected to continuous shock & vibration during truck operations, from traveling over unpaved roads, and on long highway drives. This shock & vibration was damaging the internal components of the competitor’s transmitters.

The transmitters also operate in a harsh environment, which exposes them to water, mud, and oil. During washdown, the truck is sprayed clean with high pressure water, often causing water to leak into the transmitter’s housing. The water then shorts out the internal components and results in transmitter failure.

Application Challenges 
  • Continuous vibration & shock
  • Harsh environment: oil, water, mud High pressure washdown
  • With frustration, replacements, and downtime increasing

Customer’s Needs:
  • Hermetically sealed: enclosure must not leak under harsh conditions Compact size (space restrictions on truck)
  • Durability: components must withstand continuous shock & vibration

REOTEMP designed and engineered a new product called the Slim-Line Transmitter that met all of the customer’s needs. The new product incorporated an all-welded enclosure and re-inforced seals to protect against leaking. A cushioned interior component design ensured the Slim-Line was up to the challenge of the harsh Frac Truck application. This product is now used in a variety of applications that require a very durable, compact, and accurate temperature transmitter.

Reprinted with permission by REOTEMP

Tuesday, May 22, 2018

Yokogawa TDLS8000 In-Situ Gas Analyzer

TDLS8000 from Yokogawa
Yokogawa’s TDLS8000 houses all of the industry’s leading features in one robust device. The platform design is for in situ measurements which negate the need for sample extraction and conditioning. The non-contacting sensor allows for a variety of process types including corrosive, abrasive and condensing.

  • SIL2 TruePeak combined with smart laser Technology
  • Intuitive touchscreen HMI
  • HART and Modbus TCP communications standard
  • 8-stage auto-gain adapts to difficult applications
  • Fully field repairable with 50 days of data and spectra storage
  • Compact design for one-man installation without sacrificing ruggedness
  • Area classification Zone2/Div2 or Zone1/Div1
(816) 353-6550