Showing posts with label Level Switch. Show all posts
Showing posts with label Level Switch. Show all posts

Sunday, May 7, 2017

FCI ST100 and ST110 Thermal Dispersion Flow Meters

FCI flow meters
FCI flow meters
FCI flow meters operate on the principle of thermal dispersion. The flow meter circuitry measures the temperature differential between a heated and a non-heated sensors.  The greater the mass flow rate, the less temperature differential between the two sensors.

FCI flow meters
The ST100 series transmitter is unsurpassed in meeting your current and future need for outputs, process information and communications. Whether your output needs are traditional 4-20 mA analog, frequency/pulse, alarm relays or advanced digital bus communications such as HART, FOUNDATION Fieldbus, PROFIBUS, or Modbus, ST100 has you covered. ST100's bus communications have been certified by and are registered devices with HART and Foundation Fieldbus. In addition, Emerson Process (Delta V), Yokogawa and ABB (800xA) have tested and verified ST100 Series' FOUNDATION Fieldbus interoperability with their systems. Should you ever need to change or upgrade, ST100 can be converted to any of these outputs with a simple card change in the field.

FCI flow meters
Many alternative flow meters require periodic removal from service verify calibration which can be expensive if the flow meter needs to be sent back to the factory. The FCI ST110 is capable of calibration verification without being taken out of service.

ST100 flow meters offer the following advantages over other gas flow technologies:
  • Three, 4-20 mA outputs for flow, temperature, and/or optional pressure
  • Very high turn down ratios - up to 1000:1
  • Digital communication options of Foundation Fieldbus, PROFIBUS,  HART or Modbus 
  • The data logging via removable SD card
Ruggedness, accuracy, and superior quality made FCI the leader in thermal dispersion mass flow meters, flow switches and level switches for industrial process measurement applications. FCI air and gas flow meters are applied from small dosing lines to the largest stacks. For more information about FCI in Maryland or Virginia, visit or call 410-666-3200.

Wednesday, March 23, 2016

Choose Thermal Dispersion Flow and Level Technology for Your Next Application

thermal dispersion flow and level
Thermal Dispersion flow and level
switches (courtesy of FCI)
Thermal Dispersion flow and level switches are found in continuous operation in the most demanding and critical process and plant applications. This technology is the most preferred solution in oil and gas upstream and downstream applications; wastewater treatment; chemical operations; power plants, including nuclear power; food and beverage; refineries; mining; metals; manufacturing and more. Whether your application is for flow, level, flow + temperature or level + temperature, there is an thermal dispersion flow and level switches are available to meet your needs.

The reasons for their popularity are clear. They were developed from more than 40 years of flow and level switch engineering and application experience to deliver the most reliable, repeatable, rugged and longest life industrial grade switch products found anywhere.

Thermal Dispersion technology uses the principle of measuring the heat loss, or cooling effect, of a fluid flowing across a heated cylinder. A typical flow element configuration uses two RTDs, sheathed in thermowells, separated by a gap. Heat is applied internally to one RTD relative to the other, creating a differential temperature between the two. This differential temperature is greatest at no flow conditions and decreases as flow increases, cooling the heated RTD.

Changes in flow velocity or immersion of the flow element into a liquid directly affect the extent to which heat is dissipated and, in turn the magnitude of the temperature differential between the RTDs. This differential is electronically converted into an electrical signal that can be used to trip a relay in flow or interface switch applications.

Since the relationship between flow rate and cooling effect is directly related to mass in gas applications, Thermal Dispersion technology, combined with advanced signal linearizing circuitry, is used to provide a highly repeatable and accurate measurement of gas or air mass flow rates.

Advantages to Using Thermal Dispersion

  • Precise performance accuracy
  • No moving parts
  • All welded design
  • All 316L stainless steel, Hastelloy, or exotic materials
  • Designed for heavy industrial environments
  • High liquid flow rate sensitivity
  • High temperature service
  • All liquids and gases

Additionally, models are available with 316L stainless steel wetted parts that are electro-polished to 20 Ra, with a sanitary flange process connection meet the sanitary requirements of the food, beverage, pharmaceutical and chemical industries. The instrument’s "no moving parts" design makes it ideal for monitoring the flow of syrups, fillings and other viscous media and product slurries. This design is suitable for both clean-in-place and steam-in-place applications.

For more information about Thermal Dispersion flow and level products, contact:

Flow-Tech, Inc.
10940 Beaver Dam Rd
Hunt Valley, MD 21030
Ph: 410-666-3200

Central VA Office
10993 Richardson Rd#13
Ashland, VA 23005
Ph: 804-752-3450