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Mechanical flow meters have stood the test of time since their inception in the 18th century. Their reliability and efficiency in measuring fluid flow continue to be valued across various industries. Over the years, advancements in fluid flow measurement techniques, such as Daniel's use of differential pressure and Venturi's examination of the Venturi tube, have contributed to their sustained popularity.

Types of Mechanical Flow Meters

Mechanical flow meters utilize moving parts like gears or turbines to measure fluid flow, encompassing various types [2] tailored for specific applications:

Turbine Flow Meters:

These employ rotating turbines to measure flow rates in water, chemicals, and fuels as shown in the image. However, they might face accuracy challenges at low flow rates and high-velocity operation.

turbine flow meter
Source: Link

Positive Displacement Flow Meters

Known for accuracy and reliability, these excel in measuring viscous liquids like oils but might not be ideal for water measurement.

Rotameter or Variable Area Flow Meters

Equipped with tapered tubes and a float mechanism, they offer versatile readings for gases and liquids but might come with drawbacks like high cost and limited accuracy with incompatible fluids.

Rotameter - a type of mechanical flow meter
Source: Link

Recommended Read: Types Of Flow Meters

Factors in Selecting a Mechanical Flow Meter

Selecting the right flow meter involves considering several factors:

Fluid Characteristics

Viscosity, temperature, and cleanliness of the fluid are crucial factors influencing meter selection.

Flow Rate Information

Sizing the flow meter to handle 20-80% of the maximum flow rate ensures optimal performance and durability.


Depending on the application, specific levels of accuracy may be necessary to avoid financial losses or quality issues.

Location & Installation

Proper location, piping characteristics, and installation ensure accurate readings and stable meter performance.

Output Needs

Whether flow measurement data is required for local or remote use determines the type of flow meter and its data transformation capabilities.

Cost Considerations

Considering overall costs, including maintenance, setup, and troubleshooting expenses, is essential when selecting a flow meter.

Advantages of Mechanical Flow Meters

  • Reliability: With proper maintenance, these meters can operate seamlessly for over a decade, making them dependable instruments for long-term needs.
  • Cost-Effectiveness: They offer a cost-effective solution in terms of both initial investment and ongoing maintenance compared to electronic counterparts.
  • Simple Installation: Known for their straightforward installation process, they save on labour costs and are popular for scenarios requiring rapid deployment.

Limitations of Mechanical Flow Meters

  • Limited Accuracy: Mechanical flow meters may exhibit a considerable margin of error, impacting precision in crucial measurements.
  • Maintenance Requirements: They demand frequent and rigorous maintenance efforts, leading to increased downtime and additional costs.
  • Limited Features: Lacking advanced features available in electronic models, these meters might struggle with adaptability in modern industrial application

Overcoming Limitations with Dhaara Smart Flow Meter

Dhaara Smart Flow Meter revolutionizes flow measurement with cutting-edge technology, addressing the limitations of traditional mechanical flow meters.

Dhaara Smart
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Dhaara Ultrasonic Industrial Flow Meter
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The Dhaara is a new-age water meter that combines the power of IoT with the latest sensor technologies. The integrated telemetry and battery-powered capabilities make it easy to manage your water consumption from anywhere and anytime (even when the power is down).
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Enhanced Security

Dhaara Smart addresses security concerns with advanced tamper detection technology, providing a level of security mechanical meters lack.

AI-Driven Analysis

Incorporating AI-driven technology ensures accurate and insightful data, enabling informed decision-making in real-time.

In-House Calibration

Its in-house calibration setup ensures consistent and accurate performance, reducing downtime and operational costs.

Plug-and-Play Design

Simplified installation, without complex setups, reduces deployment time and associated expenses.

In addition to the other benefits listed, the table outlines the comparison between Dhaara smart and mechanical flow meters.

Dhaara Smart


Dhaara Smart meter

Mechanical flow meter







External power supply

Not required


In-built telemetry



Tamper proof





Very high

Online logbook



Smart features




While traditional mechanical flow meters have served industries reliably, their inherent limitations are evident. Dhaara Smart Flow Meter emerges as a modern solution, surpassing the expectations set by traditional meters. Its innovative features and user-friendly design offer a reliable and advanced alternative, meeting the evolving demands of precision and data handling in various industries.

  1. CGWA NOC: Why Companies Drawing Ground Water Apply For It
  2. The Ultimate Guide To Flow Meter Installation For Best Accuracy
  3. Why Does A Flow Meter Require Full Flow In The Pipe? What Happens When There Is Partial Flow?
  4. Why Does A Flow Meter Show Higher Reading & How To Fix It
  5. Different Methods To Validate The Accuracy Of Flow Meter On The Field?
  6. Flowmeters With Telemetry
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