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DFM 5.1 Doppler Flow Meter: Pulsar Portable Slurry Pipe Inspection Kits
Quick Answer
The DFM 5.1 Doppler Flow Meter is a portable clamp-on meter for slurry, sludge, and dirty water. It mounts on the outside of a full pipe and gives a flow reading without cutting the line. Silver Automation Instruments supplies this Pulsar portable inspection kit to mining, dredging, wastewater, and construction teams across Southeast Asia, Australia, Latin America, Africa, and the Middle East.
Use this meter for fast spot-checks on liquids with solids or gas bubbles. Do not use it on clean water.
What the Kit Solves
Most flow meters struggle when solids are present. The DFM 5.1 uses Doppler signal processing to read moving particles or gas bubbles. A slurry line inspector can mount the sensor, check the signal, and read velocity and flow rate within minutes. There is no shutdown and no contact with the process fluid.
This matters on tailings lines, dredge discharge pipes, thickener underflow lines, and sludge return lines. Fixed meters cost more and take longer to install. A portable kit gives a quick answer during a shutdown window or a site audit.
Kit Components and Installation
A standard Pulsar Portable Slurry Pipe Inspection Kit includes the DFM 5.1 electronics, a clamp-on Doppler sensor, mounting straps, acoustic couplant gel, a carrying case, and a power lead or battery pack. Common sensor cables are 5 m and 10 m. Longer cable can be supplied for deep culverts or pump stations.
The meter works on carbon steel, stainless steel, HDPE, PVC, and rubber-lined pipe. The pipe must be full at the measuring point. The sensor fits on the outside surface. Because the sensor does not touch the slurry, it does not wear from abrasive solids.
Field Applications
A dredging contractor in Vietnam checked tailings flow on a DN300 HDPE pipe during the wet season. A wastewater crew in Queensland spot-checked return activated sludge on a DN150 carbon steel line. In Chile, a copper mine inspector measured tailings slurry on a rubber-lined pipe before a pump station.
Other uses include sand slurry in quarries, bentonite mud in piling work, dredge discharge, thickener underflow, and paper sludge. The meter is not designed for clean water. Clean water needs a transit time clamp-on meter or an electromagnetic flow meter.
Technical Performance You Should Expect
Standard sensors usually cover pipe sizes from DN25 to DN1000. The DFM 5.1 is built for flow velocities from about 0.05 m/s to 12 m/s on liquids with solids or gas bubbles. Most users see a stable reading within a few seconds after the signal locks.
Accuracy depends on solids distribution and pipe surface condition. In field checks, repeatability matters more than laboratory accuracy. The meter stores logged data for review. Some versions include 4-20 mA outpu
Here is the thing. A portable Doppler meter is not a replacement for a permanent magnetic flow meter. The DFM 5.1 is fast and non-invasive. For permanent high-accuracy duty, Silver Instruments can quote an electromagnetic flow meter or a Coriolis mass flow meter.
Why Field Teams Use This Kit
The hardware is compact. One technician can carry the case to a pump station. The display is readable in direct sunlight. Setup does not require wall thickness, lining thickness, or fluid viscosity. You enter the pipe outer diameter, select the unit, and start. In practice, most engineers skip the advanced menu because the default DSP filter works well on typical slurries.
Battery life is enough for a full inspection shift. Protect the sensor cable from sharp edges. We have seen damaged cables many times when an operator pulls the sensor across steel grating. A simple cable guard prevents this.
Ordering and Recommendation
For most slurry inspection jobs, order the DFM 5.1 Portable Slurry Pipe Inspection Kit with a standard Doppler sensor and a 10 m cable. If your pipes are below DN50 or above DN1000, send us your pipe size first. Silver Automation Instruments can confirm the best sensor and mounting kit.
Send us your pipe DN, pipe material, slurry type, solids content, and flow range. We will return a price in USD, a delivery estimate, and freight options. We ship to Australia, Indonesia, Vietnam, Thailand, Saudi Arabia, UAE, Chile, Peru, Mexico, South Africa, and other industrial markets.
FAQ
Does the DFM 5.1 work on clean water?
No. The Doppler sensor needs particles or gas bubbles to reflect the ultrasonic signal. For clean water use a clamp-on transit time flow meter or an electromagnetic flow meter.
Can we install the sensor on a vertical pipe?
Yes, but the pipe must be full and flow should be upward. Avoid downward flow and trapped air at the measuring point.
What cable lengths are available?
Standard kits include 5 m or 10 m sensor cable. Longer custom lengths can be supplied. Tell us your site layout before ordering.
Does the DFM 5.1 require pipe shutdown?
No. The sensor mounts on the outside of the pipe. The process keeps running during installation.
Can the meter be used in ATEX zones?
The portable kit is typically for general areas. If you need ATEX Zone 1 or Zone 2, share the classification before ordering. We will check the latest Pulsar certification and propose the correct version.
Contact Silver Automation Instruments
Tel: +86-25-68650347
WhatsApp: +86-25-52155837
WeChat: +86 15365082610
Web: flow-meter.com.au
Send us your pipe DN, slurry type, solids content, and flow range. We will quote the DFM 5.1 portable Doppler kit for your site.