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

Sunday, October 13, 2019

The Jordan Mark 75 Control Valve

The Jordan Valve Mark 75 wafer-style control valve provides you strong advantages in pricing, weight, capacity, and ease of maintenance. The wafer body means lower weight and size, which lowers cost. The Mark 75's lighter weight means you spend less time on installation and support.

The wafer-style body and sliding gate combination gives you an operating Cv range from 8 to 600 for outstanding control. The Mark 75 also makes  180° rotation easier, as well as reversing of function and changing actuation because of its T-slot design.


  • Shorter stroke length than globe or cage designs
  • Straight-through flow
  • Ease of maintenance
  • Easy installation between flanges with wafer body
  • High flow rates
  • Self cleaning, self lapping seats
  • Reduced noise compared to conventional globe/ cage valves
  • More resistant to cavitation / flashing with straight through, wafer design

Installed in a broad range of gas, chemical and steam applications all over the world, Jordan control valves have been providing unparalleled benefits to industrial manufacturers for over fifty years.

For more information about Jordan Valves, contact Hile Controls of Alabama by calling 800-536-0269 or by visiting

Monday, September 30, 2019

Selection and Calibration of a Turbine Flow Meter Whitepaper

Flow Technology
Turbine flow meters have been an effective flow measurement technology for many years. Advancements in other measuring technologies in recent years have provided many options when selecting a meter for a flow measurement application. This has the benefit of allowing the user to select the measuring technology that provides the optimum characteristics for the specific application. The downside of all these measurement options is the user must have a significant understanding of many technologies in order to make the best educated decision when selecting the meter.
Flow Technology
The intent of this paper, courtesy of FTI Flow Technology, is to provide the reader with a basic understanding of the operational characteristics and calibration methods of turbine flow meters. The information provided is targeted at liquid meter applications. Turbine meters are also successfully used in gas applications. The operational characteristics of gas meters are basically the same as liquid meters, however the calibration methods and procedures are worthy of a paper specific to gas applications and will not be address at this time.

Hile Controls of Alabama

Wednesday, September 25, 2019

The Honeywell Analytics Searchzone Sonik™

Searchzone Sonik
Searchzone Sonik™ is a hazardous area certified advanced ultrasonic gas leak detector for detecting pressurized gas leaks. It provides local visual status indication as well as 4-20 mA with HART® and Modbus® outputs as standard. It has a Bluetooth® interface for configuration and maintenance using the Searchzone Sonik™ App on a suitable Bluetooth enabled smartphone or other suitable Android
device (mobile device).
Searchzone Sonik
The Searchzone Sonik™ detector is ATEX and IECEx approved for
use in either Zone 1 (gas) or Zone 21 (dust) hazardous areas as well as being cULus approved for use in Class I Division 1 or Class II Division 1 locations. See Certification and Approvals section of this manual for a list of certificates.
Searchzone Sonik
The Searchzone Sonik™ detector is available in painted Stainless Steel. It has two cable entries for easy wiring with either M25 or 3/4” NPT cable entries, dependent on the version.

Hile Controls of Alabama

Thursday, August 22, 2019

Applications and Industries Using the ABB LMT Magnetostrictive Level Transmitter

This video outlines the primary industries and applications where the ABB LMT Series of level transmitters are used.

The ABB LMT Series of level transmitters is a modular range of field mounted, advanced microprocessor-based electronic transmitters, utilizing multiple sensor technologies. Accurate and reliable measurement of liquid level and interface are provided in even the most difficult and hazardous  industrial environments. The LMT100 is also available with optional temperature measurement.

For more information on the ABB LMT series, contact Hile Controls of Alabama by calling 800-536-0269 or visit

Tuesday, July 23, 2019

Understanding Cascade Control Loops

Cascade with feedforward
Cascade with feedforward (image courtesy of Eurotherm).

Cascade control is a technique used to enable processes with long lags to be controlled with the fastest possible response to process disturbances including setpoint changes, while still minimizing the potential for overshoot. This is achieved by controlling a secondary, more responsive process that influences the main process. The main process is controlled using a master PID loop, the output of which is used to determine the setpoint of the secondary process which is controlled by a second PID loop. This second loop is referred to as the slave loop.

Benefits of Cascade Control:
  • Accurate control of load
  • Compensation for process delays
  • Overheating protection
  • Optimum Process response
For example, in the vacuum heat treatment furnace shown below, the workpiece temperature can be controlled using a cascade configuration where the furnace workpiece temperature is used by the master loop and the the heating element temperature is used by the slave loop.

Cascade with feedforward
Vacuum heat treatment furnace
Vacuum heat treatment furnace.
(Image courtesy of Eurotherm)

Feedforward is an option available when using cascade control. It allows either the master PV, master SP or user defined variable to be fed forward so that it directly influences the slave setpoint (see diagram below).This minimizes the amount of work required from the master PID loop.

Master SP/PV feedforward

In this mode the feedforward limits are set directly in the slave loop’s engineering units, which also adjusts the gain of the feedforward path. In the case of PV feedforward this allows the difference between the master and slave PV’s to be limited and is often called “Delta T control”. This is used on reactor vessels and autoclaves to limit temperature gradients, thus minimizing processing time and ensuring consistent product quality.

Process feedforward
Pasteurization (image courtesy of Eurotherm).

An example where cascade control with feedforward can be used is in pasteurization heat exchangers. The feedforward signal allows the controller to compensate for rapid variations in inlet flow therefore maintaining a stable outlet temperature.

Cascade Control is ideal for:
  • Heat treatment furnaces
  • Vacuum furnaces
  • Autoclaves
  • Semiconductor diffusion
  • Batch reaction vessels
  • Heat exchangers
  • Crystal growth
  • Distillation columns
For more information regarding applying controllers to any process heating application, contact Hile Controls of Alabama. They can be reached by calling 800-536-0269 or visit their web site at

Reprinted with permission from Eurotherm.