Ultrasonic Flow Meters

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When Do You Need a Portable Ultrasonic Flow Meter? 6 Common Flow Measurement Challenges and How to Solve Them

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When Do You Need a Portable Ultrasonic Flow Meter?
6 Common Flow Measurement Challenges and How to Solve Them

No flume to build. No pipe to cut. One submerged sensor at the flow itself.

1. Introduction

Accurate flow measurement is essential for efficient operation, equipment maintenance, and process control. However, not every application requires a permanently installed flow meter.

In many industrial facilities, engineers and maintenance teams face practical challenges: existing flow meters need to be checked, pipelines are difficult to access, production cannot be interrupted, or flow rates need to be measured at multiple locations.

Installing a conventional inline flow meter for every measurement point can be expensive, time‑consuming, and sometimes impractical.

A portable ultrasonic flow meter offers a flexible alternative. Using clamp‑on ultrasonic sensors, it measures liquid flow from outside the pipe without cutting the pipeline or interrupting normal operations.

The Lanry TF1100‑EP Portable Transit‑Time Ultrasonic Flow Meter is designed for these situations, providing a convenient solution for temporary flow measurement, flow meter verification, equipment inspection, and maintenance activities.

2. Need to Measure Flow Without Stopping Production?

The problem

In many industrial processes, shutting down a pipeline simply to install a flow meter is not an option.

Water supply systems must operate continuously.

Industrial production lines cannot afford unnecessary downtime.

Existing pipelines may carry hot liquids or pressurized fluids.

Cutting or modifying a pipeline may require additional labor, permits, and maintenance costs.

The solution: Non‑invasive clamp‑on flow measurement

A portable clamp-on ultrasonic flow meter measures flow without direct contact with the liquid.

The ultrasonic transducers are mounted on the outside surface of the pipe. They transmit and receive ultrasonic signals through the pipe wall to calculate the flow velocity.

With the TF1100‑EP, there is no need to cut the pipe, drill holes, or interrupt the process for meter installation.

Why it matters:
No pipeline modification.
No process shutdown for sensor installation.
No additional pressure loss caused by an inserted measuring element.
Sensors can be removed and reused at other measurement points.

This makes the TF1100‑EP particularly useful for maintenance inspections, temporary measurements, and retrofit applications.

3. Not Sure Whether Your Existing Flow Meter Is Measuring Correctly?

The problem

An installed flow meter may display readings that differ from expected values.

Sensor aging or damage
Incorrect installation
Changes in operating conditions
Calibration or measurement drift
Unstable process flow

Replacing the meter immediately can be costly, especially when the actual problem has not yet been identified.

The solution: Verify flow readings with a portable ultrasonic flow meter

A portable ultrasonic flow meter provides an independent way to check the flow rate at the same pipeline.

The TF1100‑EP can be temporarily installed alongside an existing flow meter, allowing engineers to compare the readings under similar operating conditions.

This helps maintenance teams:

Check whether an installed flow meter is operating normally.

Identify possible measurement deviations.

Evaluate flow meter performance.

Make better-informed maintenance or replacement decisions.

Practical tip

For a meaningful comparison, measure under stable operating conditions and consider the installation requirements of both meters. Differences in measurement position, flow profile, pipe condition, and measurement principle can affect the results.

4. Need to Measure Flow at Multiple Locations?

The problem

A single permanently installed flow meter only measures flow at one specific point.

Flow distribution across different branches.

Differences between inlet and outlet flow rates.

Pump performance.

Water consumption in different production areas.

Flow conditions at different sections of a pipeline.

Installing a permanent meter at every point can significantly increase project costs.

The solution: One portable meter for multiple measurement points

The TF1100‑EP is designed for mobile measurement.

Its compact portable transmitter and external clamp-on sensors allow technicians to move between different measurement locations without installing separate permanent instruments.

With a suitable transducer configuration, the TF1100‑EP covers pipe sizes from DN20 to DN5000.

Typical application scenarios:
Water distribution networks
Industrial process pipelines
Pumping stations
Cooling water systems
Building water systems
Plant maintenance and energy audits

Instead of purchasing multiple flow meters for occasional inspections, one portable instrument can serve multiple measurement tasks.

5. Why Choose the Lanry TF1100-EP Portable Ultrasonic Flow Meter?

The TF1100‑EP combines non‑invasive measurement with portable operation, making it a useful tool for engineers, service technicians, and maintenance teams.

Non-invasive measurement
Clamp-on sensors measure flow without cutting or drilling the pipeline.
Wide pipe size coverage
DN20–DN5000, depending on transducer selection.
Bidirectional measurement
Flow velocity range of 0.01–12 m/s.
Measurement accuracy
±1.0% of reading at flow velocities above 0.3 m/s, under specified conditions.
Long battery operation
Up to 50 hours on a full charge.
Data logging
Record measurement data for further analysis.
Optional heat measurement
Compatible with paired PT1000 temperature sensors.
Multiple outputs
4–20 mA, OCT, RS232, RS485 Modbus, and other optional configurations.
Portable design
Approximately 3 kg, convenient for on-site measurement.

6. Is the TF1100-EP Suitable for Your Application?

The TF1100‑EP uses transit-time ultrasonic technology. It is primarily designed for measuring liquids in full pipes.

For reliable measurement, several application conditions should be checked before selecting the instrument.

Application factor What to check
Liquid type Clean liquids and somewhat dirty liquids with suitable acoustic transmission
Pipe condition The pipe should be completely filled with liquid
Pipe material Suitable for ultrasonic signal transmission
Pipe size DN20–DN5000, depending on transducer selection
Liquid temperature -35°C to 200°C, depending on sensor configuration
Flow velocity 0.01–12 m/s
Installation location Sufficient straight pipe length and a suitable sensor mounting position
Important

Transit-time ultrasonic flow meters are not suitable for every liquid or pipeline. Heavy suspended solids, excessive gas bubbles, severe pipe corrosion, internal lining conditions, and poor acoustic signal transmission may affect measurement performance.

Before ordering, it is recommended to confirm the pipe material, outside diameter, wall thickness, liquid type, temperature, and operating flow conditions.

Frequently Asked Questions

Can a portable ultrasonic flow meter measure flow without stopping the process?

Yes. A clamp-on ultrasonic flow meter installs its sensors on the outside of the pipeline. No pipe cutting or process interruption is normally required for sensor installation.

Can the TF1100-EP measure hot water?

Yes. With the appropriate transducer configuration, it supports liquid temperatures from -35°C to 200°C. The selected sensor must be suitable for the actual operating temperature.

Can the TF1100-EP measure dirty water?

It can measure clean and somewhat dirty liquids under suitable conditions. The specified turbidity capability is below 10,000 ppm. However, high concentrations of suspended solids or entrained air can weaken ultrasonic signals and affect measurement reliability.

Can it measure flow in both directions?

Yes. The TF1100-EP supports bidirectional flow measurement, with a velocity range of 0.01–12 m/s.

How long can the TF1100-EP operate on battery power?

The built-in rechargeable battery supports up to 50 hours of operation when fully charged.

Can it be used to check an existing electromagnetic flow meter?

Yes. It can be used as an independent reference for on-site flow comparison. However, the measurement conditions, installation location, and accuracy of both instruments should be considered when evaluating differences.

READY TO SPEC?

Tell us your flow measurement application — we'll size the meter

Share your pipe size, liquid type, temperature, flow range and measurement requirements. The Lanry team will recommend the suitable configuration of the portable ultrasonic flow meter.

View TF1100-EP Portable Ultrasonic Flow Meter →

Jessica Niu, Sales Engineer at Lanry Instruments

TALK TO OUR ENGINEER
Jessica Niu · Sales Engineer

With 6+ years of experience in industrial instrumentation, I provide practical solutions for flow measurement, installation, commissioning, and troubleshooting based on real-world project experience. Feel free to contact my WhatsApp.

Post time: Nov-04-2026

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