Doppler
AM-DFM Doppler Flow Meter
Doppler ultrasonic flow meter for sludge, slurry and raw wastewater where the liquid carries enough solids or bubbles to reflect the signal.
- Model
- AM-DFM
- Category
- Doppler
- Outputs
- 4–20 mA, Pulse, Modbus RTU
- Lead time
- 7 working days
- MOQ
- 1 unit
- OEM available
- Yes
Technical specifications
| Pipe size | DN25–DN2000 |
|---|---|
| Accuracy | ±2.0% of reading, ±0.5% at full scale repeatability |
| Velocity range | 0.03–6 m/s |
| Solids or bubbles needed | At least 100 ppm, typically above 20 µm |
| Protection | IP68 transducer, IP65 transmitter |
| Outputs | 4-20 mA, pulse, two relays, RS485 Modbus |
What it is not the answer for
Read this before asking for a price: one of these conditions is what turns a good meter into a bad installation.
- Clean water or clear liquids without suspended solids or bubbles
- Pipes with a sound-attenuating wall or a loose lining
- Applications needing custody-transfer accuracy
Maintenance and service life
Clean the transducer window monthly on sludge lines; coating is the usual cause of a falling signal. Check the solids threshold against a grab sample once a quarter. The sensor has no moving parts to replace.
Applications
Where this model is used
Each application names a measuring point and the conditions that decide the selection.
WW-FL
Municipal Wastewater Inlet Flow Measurement
Inlet and outlet flow in raw sewage, where solids, gas entrainment and short straight runs defeat clean-liquid meters.
WW-SL
Sludge Transfer and Blanket Level
Sludge transfer flow and blanket level in settling tanks, where coating and low velocity defeat clean-liquid instruments.
Elsewhere in the range
Other models in Flow Measurement
The same category holds the models that solve the neighbouring problem, and the price difference is usually smaller than the cost of the wrong principle.
AM-LTF
AM-LTF Liquid Turbine Flow Meter
Liquid turbine flow meter for clean, low-viscosity liquids, with a wide turndown and a pulse output for batch control.
AM-MFM
AM-MFM Electromagnetic Flow Meter
Obstructionless electromagnetic flow meter for conductive liquids and two-phase slurries, DN6–DN2600, with five liners and seven electrode materials.
AM-OCFM
AM-OCFM Open Channel Flow Meter
Open channel flow meter for flumes, weirs and non-standard channels, with the site's own head-flow table entered directly.
Content plan — certificates and case references
- The declarations that apply to this model: CE, RoHS and any hazardous-area approval, each with its certificate number and the body that issued it.
- One or two installations: plant type, medium, model supplied and what the reading is used for. Customer name only where written permission exists.
Measuring point does not match the table above?
Send the medium, the pipe size and the output your control system expects. We answer with the principle that fits, or with the reason none of ours does.