Percussion meters: built for low, stable densities

A percussion meter clamps on and reads the change in vibration from an impact on the outside of the pipe. It suits low, stable densities and some water slurries.

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How a percussion meter reads density

An impact on the outside of the pipe changes the vibration, and the meter reads that change. It clamps on, so there is no probe in the flow.

It suits low, stable densities and some water slurries, at a low upfront cost.

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Where it falls short on slurry

Here is where percussion typically trades off on slurry, as stated in the technology overview.

It stops working where density changes are significant.
It stops working where plant vibration is high.
Small diameter pipes.
Environmental conditions affect it heavily, and it only works with certain types of piping.
Low accuracy across a narrow range of media.

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What a Red Meter does differently

A percussion meter reads a vibration change from an impact on the pipe wall. The Red Meter reads the full bore. You get density, temperature, pressure and vibration from one device at the same moment, with vibration as its own reading.

The Red Meter installs inline between flanges, with no bypass and no probe in the flow. It uses a Class 1 laser, so there is no radioactive source to license. Readings are continuous and go to a third-party system if you want them there. Remote support is built in.

Comparison table

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Percussion against a Red Meter

Left panel: nuclear, microwave, ultrasonic and acoustic sensors on a pipe. Caption: Infers density from a narrow cross section. Right panel: a Red Meter. Caption: Reads all the material moving through the line.


	The Red Meter	Percussion
Principle	Class 1 laser reads deflection of the full bore. Vibration is a separate reading.	Change in vibration from an impact on the outside of the pipe
What is measured	Full bore	The vibration change at the impact
Contact with media	Inline between flanges. No probe in the flow.	Clamp-on. Impact on the outside of the pipe.
Radiation source	No radioactive source	No
Slurry limits	2 in to 40 in pipe, rated for 0 psi and above.	Low, stable densities on small pipes with low plant vibration.
Typical applications	Mining, dredging, oil and gas, and power.	Some water slurries

Link list

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See the proof and the specs

The Red MeterPipe sizes from 2 in to 40 in.
Case studiesResults from working lines.
Explore the TechnologyFull-bore density, with vibration as its own reading.

Call to action

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Tell us if your density moves

Percussion suits stable, low densities. If your line swings, tell us.

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