India’s environmental sustainability initiatives leading to water treatment, RO plants, Waste-water & Effluent Treatment plant has broad prospects for development in the near future.

In the above industries, as well as, Water Distribution Networks, the role of pressure sensors is gradually increasing. This ensures that the system is reliable, stable, and high-performance. Pressure sensors in wastewater and water treatment processes help establish quality control and system protection. Pressure sensor is a measuring instrument that converts pressure into a standard (4 to 20Ma) signal output. Psi/Kgs per Sq cm /Bar is the most commonly used measurement standard for pressure in a gas and fluid processing Industry. The signal obtained from the instrument is also used to measure the liquid level of the static fluid, so it can also be used to measure the liquid level in the water treatment & storage process. The application areas of pressure sensors are urban water supply, drinking water treatment, industrial sites, dam water level monitoring, and sewage treatment. RLT Instrumentation has been focusing on the supply of pressure transmitters for about 25 years (last 10 years in-house manufacturing)without compromising quality and accuracy. In this blog, let’s discuss the application of a pressure transmitter and its types.

Other Application of Pressure Transmitter

1. DP Transmitter for flow measurement

In the process industry, pressure transmitters, especially differential pressure transmitters, are used to measure the flow of liquid or gas through pipelines. Measuring the pressure drop across the orifice plate installed in a pipe is the most commonly used flow measurement method. An orifice plate is just a plate with a hole of a known size in the center. When liquid or gas passes through the orifice, a pressure drop will occur from upstream to downstream on the orifice plate. This pressure drop is proportional to the flow rate (flow rate proportional to the square root of Delta P), allowing the transmitter to calculate the flow rate in the processing pipeline in real-time.  

2. Pressure Sensor for Liquid Level Measurement

Pressure sensors can also be used to calculate the fluid level or height of fluid in the process tank. This technique is often used to measure the liquid level in storage tanks, such as water towers or sumps. For most practical applications, the liquid level is directly proportional to pressure. The pressure level sensor is an external or submersible pressure sensor, which is suitable for measuring the level of any fluid in a storage or process tank/reservoir.

The level is indirectly measured by measuring the pressure at the bottom of the fluid in the tank.​​ In order to achieve the excellent performance of the pressure transmitter, it is important to use chemically compatible materials.                                 Also, it must be calibrated accurately for each application because each liquid has its own density/specific gravity.

 In addition, changes in process temperature can cause density/specific gravity to change, which should be taken into account when the pressure is converted to a level. These sensors can be designed to keep the diaphragm free from contamination or accumulation, thus ensuring correct operation and accurate hydrostatic pressure level measurement.

3. Water Pipeline Leakage Detection

To detect any leaks in the pipeline, there are many methods available, but we can also detect leaks in the pipeline through measuring the pressure. Pressure Reduction could point to pipe leakages. Fixed Pressure Transmitters mounted directly on the Pipeline at various intervals can pin-point the specific leakage point along any Pipe carrying any fluid/water.

In such situations, such leakage points could result in waste-water entry into potable water lines resulting in water contamination & health hazards.

Types of Pressure Transmitter

1. Fixed Transmitter

The fixed pressure transmitter (FPT )is a compact instrument mounted directly on the pipeline. The FPT is powered by 24 V DC & gives a 2-wire 4 to 20mA current output which can be connected to a Panel Mounted Digital Indicator for indication & alarming. RLT FPT also has an optional built-in display.

The fixed pressure transmitter allows measuring the pressure of gases and liquids, including corrosive types (with the proper material selection of the wetted/exposed parts. It is also used in the wastewater and water treatment industry, pharmaceutical production, chemistry, food industry, oil and gas industry, laboratory research.

2. Smart Pressure Transmitter

The smart pressure transmitter (SPT) has a digital display with key for configuration of range setting & other parameters. It’s generally a variable pressure transmitter (unlike a FPT).

For example, a 0 to10 bar SPT can be set for 0 to 5 bar (4mA at 0 bar & 20mA at 5 bar).This flexibility is generally desirable for process plant applications.

The Smartness also comes from the HART Module (optional), especially for process applications where operations demand remote range setting /configuration & various other smart sensor information.

3. Differential Pressure Transmitter

The differential pressure transmitter has become one of the rapidly developing and preferred pressure transmitters in the market. It is an instrument that uses two components to measure the pressure difference in a closed pipe. Differential pressure transmitter is also called Delta-P or DP, where Delta means “change in” and “P” means pressure. The DP transmitter consists of a primary component, a secondary component, and electronic housing. Low & High-Pressure Diaphragms to which the low & high pressure are subjected & the basic sensor (capacitance/inductance/strain gauge)which due to mechanical deflection provides proportional milli-volt change is converted by Smart Electronics to 4 to 20mA signal proportional to the Flow Rate.

Conclusion

Hence, these are all about the application of a pressure transmitter and its types. RLT Instrumentation, with its 25 years of technical expertise in the field of instrumentation, manufactures highly accurate different types of pressure transmitters in an advanced manufacturing facility and supplies & provides services all over India.  

Hope you find this blog useful and informative. Let me know what you think in the comment section below

“Get in touch with us today to learn more about our products and services”. Let’s help you prevent pollution & add value to global sustainability!.                   

FAQS

1. What is the role of pressure transmitters in the water industry?

This ensures that the system is reliable, stable, and high-performance. Pressure sensors in wastewater and water treatment processes help establish quality control and system protection. 

2. What is a pressure sensor?

The pressure sensor is a measuring instrument that converts pressure into a standard (4 to 20Ma) signal output. Psi/Kgs per Sq cm /Bar are the most commonly used measurement standard for pressure in a gas and fluid processing Industry.

3. What are the most commonly used measurement standard for pressure in an Industry.?

Psi/Kgs per Sq cm /Bar is the most commonly used measurement standard for pressure in a gas and fluid processing Industry.

4. What are the application areas of pressure transmitters?

The application areas of pressure sensors are urban water supply, drinking water treatment, industrial sites, dam water level monitoring, and sewage treatment. 

5. What is a Fixed Pressure Transmitter?

The fixed pressure transmitter (FPT )is a compact instrument mounted directly on the pipeline. The FPT is powered by 24 V DC & gives a 2-wire 4 to 20mA current output which can be connected to a Panel Mounted Digital Indicator for indication & alarming. RLT FPT also has an optional built-in display.

6. What are the other applications of Pressure Transmitter?

• Flow Measurement
• Level Measurement
• Detection of pipe leaks

7. What are the types of pressure transmitters?

• Fixed Pressure Transmitter 
• Smart Pressure Transmitter
• Differential Pressure Transmitter

8. What are the application of fixed pressure transmitters?

 Fixed Pressure Transmitter allows measuring the pressure of gases and liquids, including corrosive types (with the proper material selection of the wetted/exposed parts. It is also used in the wastewater and water treatment industry, pharmaceutical production, chemistry, food industry, oil and gas industry, laboratory research.

9. What is called a smart pressure transmitter?

The smart pressure transmitter (SPT) has a digital display with a key for the configuration of range settings & other parameters. It’s generally a variable pressure transmitter (unlike an FPT).

10. What is a differential pressure transmitter?

The differential pressure transmitter has become one of the rapidly developing and preferred pressure transmitters in the market. It is an instrument that uses two components to measure the pressure difference in a closed pipe. Differential pressure transmitter is also called Delta-P or DP, where Delta means “change in” and “P” means pressure.