Cutting a pipeline to install a flow meter can increase installation costs, interrupt production, and require additional maintenance work.
For many suitable applications, a clamp-on ultrasonic flow meter provides another option. The Lanry TF1100-CH handheld ultrasonic flow meter uses external transducers to measure liquid flow without inserting a sensor into the pipeline.
? How Does Non-Invasive Flow Measurement Work?
The TF1100-CH uses ultrasonic transit-time technology. Two transducers transmit and receive ultrasonic signals through the liquid.
The difference between upstream and downstream transit times is used to calculate the liquid velocity and flow rate.
Because the transducers are mounted on the outside of the pipe, they do not obstruct the flow or create pressure loss from an inserted measuring element.
What Are the Benefits of Measuring Flow Without Pipe Cutting?
Reduced installation work
There is generally no need to cut the pipe or install new inline connections.
Less process interruption
Measurement can often be performed while the pipeline remains in operation.
Flexible testing
Engineers can move the instrument between suitable measurement locations.
Convenient maintenance
The meter can help check existing flow measurements without permanently modifying the pipeline.
These benefits make clamp-on ultrasonic flow meters useful for water systems, cooling water circuits, and industrial pipeline inspections.
Which Pipe Conditions Should You Check?
Non-invasive measurement does not mean every pipe is suitable. Before using the TF1100-CH, check the following:
- • Pipe material and outside diameter.
- • Wall thickness and internal lining.
- • Liquid composition and temperature.
- • Whether the pipe is completely full.
- • Availability of a suitable straight pipe section.
- • Whether ultrasonic signals can pass reliably through the pipe wall and liquid.
Plastic, metal, and lined pipes can have different acoustic characteristics. The appropriate transducer and installation method should be selected according to the actual pipe conditions.
Can You Install the Sensors While the Pipe Is Operating?
In many cases, yes. The sensors are mounted externally, so the liquid does not need to be drained simply to attach them.
However, the measurement location must provide suitable acoustic transmission and stable flow conditions. A partially filled pipe, excessive air bubbles, heavy deposits, or severe flow disturbances may affect the result.
Frequently Asked Questions
Post time: Oct-19-2026