Friday, January 10, 2020

Using Bluetooth to Startup and Commission the Honeywell OELD

The Honeywell Optima Excel Local Display (OELD) is a Bluetooth-enabled smart junction box for the Searchpoint Optima Plus and Searchline Excel infrared detectors for flammable hydrocarbons. The OELD includes an LCD screen for gas information, a “traffic light” indicator for at-a-glance detector status, andBluetooth® connectivity for simplified, non-intrusive maintenance. Simply pair the OELD with our intrinsically safe, ruggedized smartphone; then use the OELD smartphone app to interact with the gas detector from up to 10 meters (30 feet) away. For maximum flexibility, the gas detector can be mounted either directly or remotely to OELD to suit any situation.

For more information, contact Hile Controls of Alabama. Call them at 800-536-0269, or visit their web site at

Monday, December 23, 2019

Happy Holidays from Hile Controls of Alabama

"Christmas gift suggestions: To your enemy, forgiveness. To an opponent, tolerance. To a friend, your heart. To a customer, service. To all, charity. To every child, a good example. To yourself, respect." — Oren Arnold

Friday, December 20, 2019

Vortex Shedding Flowmeter Operating Principle

Vortex Shedding Flowmeter Operating Principle

Measuring Principle - Kármán vortex street

This variety of flowmeter operates on the principle of Kármán vortex street, whereas any medium passing through the pipeline and flows around the bluff body, sheds a series of alternating vortices on each side of the body. This phenomenon is referred to as Vortex Shedding. These vortices shed downstream of the bluff body and dissipate as they flow further. This pattern of vortices is called a Kármán vortex street (also called a Von Kármán vortex street).

Operation pf Vortex Flowmeter

A Vortex flowmeter primarily consists of a bluff body, a sensor assembly, and a transmitter. A bluff body or a shedder is nothing but a non-streamlined object or a barrier placed perpendicular to the axis of the pipeline, around which the medium flows.

Vortex Shedding Flowmeter Operating Principle

Calculation of the Mass Flow Rate

The frequency of the vortices, i.e. the number of vortices shed per second, is directly proportionate to the velocity of the medium. This Vortex Shedding Frequency is used to calculate the mass flow.
The sensor assembly records the pressure and velocity oscillations generated on each side of the bluff body by the vortices and generate a digital linear output signal. The Vortex Shedding Frequency is calculated using the following formula:

f = St * V/d

f = Frequency of Vortex Shedding St = Strouhal Number
V = Flow Velocity
d = Width of the Bluff Body

Strouhal Number St

The Strouhal Number in the above formula is also called as “reduced frequency”. It is a dimensionless param- eter that is a measure of the Vortex Shedding Frequency and the velocity of the flow medium. It is calculated using the formula:

St = fd/U

f = Frequency of Vortex Shedding d = Width of the Bluff Body
U = Velocity of the Flow Medium

The Strouhal Number is a function of the Reynold’s Number. Reynold’s Number is also a dimensionless parameter that is used to determine how the flow pattern of different fluids will change. The Strouhal Number should remain constant when the Reynold’s Number ranges from 2 × 104 to 7 × 106.

Calculation of Volume Flow Rate

When the Vortex Shedding Frequency is known, the volumetric flow rate can be calculated using the formula:

q = f/k * d

q = Volumetric Flow Rate
f = Vortex Shedding Frequency
k = k Factor, which is a ratio of the pulses transmitted to the unit volume.

You can download the TEK-TROL Tek-Vor 1300C Vortex Flowmeter Brochure from the Hile Controls of Alabama web site here.

For more information about vortex shedding flowmeters, contact Hile Controls of Alabama. Call them at 205-620-4000 or visit their web site at

Vortex Shedding Flowmeters

Wednesday, November 27, 2019

The Advantages of Infrared Pyrometers, How Infrared Pyrometers Work, Where & Why Wavelength Matters, and Pyrometer Technologies

Temperature is commonly measured in manufacturing operations to monitor and control product quality and process productivity. Many applications use contact devices like thermocouples and RTDs, but all too often these devices are inaccurate, too slow, difficult to use, or require frequent replacement creating process downtime and reducing productivity. For many applications, infrared pyrometers are the perfect solution because they can accurately and reliably measure a target’s temperature without contact.

This brochure provides an excellent basic understanding of how infrared pyrometry works, different techniques for measuring temperature, and several types of industrial pyrometer.

For more information on industrial infrared pyrometers, contact Hile Controls of Alabama. Call them at 800-536-0269 or visit their web site at

Sunday, November 10, 2019

Thank You Veterans, for Serving Our Country and Protecting Our Freedom

Through the observance of Veterans Day, we remind ourselves of the bravery, sacrifice, and selflessness of the Veterans who serve our country and protect our freedom. By celebrating our Veterans, we continue to tell the story of how this country became the most powerful on Earth - through bravery, honor, truth, and determination.

To all military personnel who took an oath to defend the United States and our Constitution, from all enemies, foreign and domestic, we at Hile Controls of Alabama thank you.

Monday, October 14, 2019

Common Configurations for the ABB LWT300 Series Guided Waver Radar Transmitter

Storage tanks,
liquid or solid.
Agitated tank
with stilling well.
The ABB LWT300 Series level transmitter can be used on a wide variety of liquid and dry storage tank configurations, such as agitated tanks with and without stilling wells, horizontal cylinder tanks, plastic tanks, and tanks with external chambers. The instrument uses LevelExpert™, a built-in intelligence to differentiate between the actual level and other false signals.

The ABB LWT300 Guided Wave Radar transmitters are equipped with on-board diagnostics that can be used for safety monitoring, improved reliability, downtime reduction, and performance verification.

The LWT300 series addresses several industries such as oil and gas, petrochemical, chemical, power generation, water and wastewater, pulp and paper, and marine. To meet these challenging applications, this series of instruments offers a wide range of configurations.


Horizontal tanks.
The LWT300 series is comprised of the LWT310 and LWT320. The LWT310 fits in a 19 mm (¾ in) NPT interface and is offered in a flanged version.


The LWT320 fits in a 38 mm (1 ½ in) NPT interface and is offered in a flanged version.

For solids applications, the LWT320 is recommended since it can withstand a higher pull force. The LWT320 is also useful for applications having a 38 mm (1 ½ in) NPT interface.

Agitated Tanks


  • Temperature range: up to 200 °C (392 °F) 
  • Maximum process pressure: 200 bar (2900 psi)
  • LevelExpert software for easy configuration, reliable surface detection and easy troubleshooting 
  • 2-wire powered and HART 7 communication
  • SIL2
  • Certified for potentially explosive atmospheres


  • CE
  • FM/ATEX/IECEx hazardous area, flameproof, intrinsically safe methods of protection
  • SIL 2 (no redundancy), SIL 3 (redundant configuration)
  • Tanks with external
  • CRN

Contact Hile Controls of Alabama with your ABB Level Instrumentation needs. They can be reached by  calling 800-536-0269 or by visiting