Gaining flow measurement inside a pipe can sometimes be tricky. The DFM 6.1 Doppler Flow Meter works as a non-contacting, clamp-on flow meter to offer effective clamp-on pipe flow measurement from outside the pipe. Its Doppler technology makes it perfect for use as a water flow meter, specifically for difficult liquids, or liquids with suspended solids such as wastewater, slurries, sludge, chemicals, viscous liquids, and abrasives. The non-invasive Doppler ultrasonic flow meter fits a pipe 12.5 mm (0.5 in) inside diameter or larger, and clamps to the outside of the pipe, gaining flow measurement readings without interrupting the process.
External Sensor - No Contact, No Maintenance
The DFM 6.1 Doppler Flow Meter is ideal for full pipes and any liquid containing gas bubbles or suspended solids. To measure velocity an acoustic signal is reflected to the sensor from moving particles or gas bubbles suspended in the fluid. Flow is calculated based on the configured pipe inside diameter.
Installation is easy – without shutting down the flow system. No contact is made with the moving fluid, and no pipe cutting or drilling is required. There is no fouling or scale build-up on the sensor.
The easy–to–use 5-key configuration system on the DFM 6.1 Doppler Flow Meter makes setup and installation quick, simple, and easy. The unit features a large digital flow rate display with a totalizer, isolated 4-20 mA output, 26-million-point data logger, and two programmable control relays.
Reverse Flow Measurement
The DFM 6.1 Doppler Flow Meter measures flow in either direction and will display positive or negative values. You can control the totalizer to subtract reverse flow or to totalize forward flow only.
Use Doppler pipe flow measurement devices to control flow within a process, protect pumps from no-flow or dry pumping, or for flow proportionate use. You can even use it to test existing equipment to ensure it's still providing accurate pipe flow measurement.
To find out more about the ideal applications for the DFM 6.1 Doppler Flow Meter, head to the Downloads tab below to read the case studies.
- Enhanced performance
- Easy to install and configure
- Non-Contacting, clamp-on, ultrasonic sensor
- Works on a large variety of pipe materials and sizes
- Large, back-lit flow rate display and totalizer
- Isolated 4-20mA output
- 2 Programmable control relays
- Optional Modbus RTU or HART output
- 128 MB data logger (26 million points)
| General Specifications | |
|---|---|
| Spec name: | Description: |
| Flow Rate Range | ±0.03 m/s to 12.2 m/s (±0.1 ft/s to 40 ft/s) in most applications |
| Pipe Size | Any pipe ID from 12.7 mm to 4.5 m (0.5 in to 180 in) |
| Accuracy | ±2% of reading or 0.03 m/s (0.1 ft/s) whichever is greater. Requires solids or bubbles minimum size of 100 microns, minimum concentration 75 ppm. Repeatability: ±0.1%, Linearity ±0.5% |
| Display | White, backlit matrix - displays flow rate, relay states, 16-digit totalizer, operating mode, and calibration menu |
| Configuration | Built-in 5-button keypad with English, French, or Spanish language selection |
| Power Input | 100-240 V AC 50/60 Hz, 10 VA maximum Optional: 9-32 V DC, 10 W maximum |
| Output | Isolated 4-20mA (1000 ohm load max.) or 0-5 V DC (field selectable) |
| Control Relays | Qty 2, rated 5 amp SPDT, programmable flow alarm, and/or proportional pulse |
| Data Logger | Built-in 26 million point logger with a USB output and Windows software |
| Enclosure Heater | NEMA4X (IP 66) polyester with a clear polycarbonate face |
| Operating Temperature (Electronics) | -23 °C to 60 °C (-10 °F to 140 °F) |
| Shipping Weight | 6.3 kg (14 lbs) |
| Sensor Specifications | |
|---|---|
| Spec name: | Description: |
| Model SE4 | Single-head ultrasonic with 7.6 m (25 ft) shielded cable and stainless steel mounting kit for pipes 12.7 mm (0.5 in) ID or larger. Designed to withstand accidental submersion to 10 psi. Certified non-incendive for Class I Division 2, Groups A, B, C, D hazardous locations |
| Operating Temperature | -40 °C to 150 °C (-40 °F to 300 °F) |
| Exposed Materials | 316SS |
| Hazardous Locations | Certified Non-incendive for Class I, Div 2, Groups A, B, C, D Optional: Certified Intrinsically safe for Class I, Div 1, Groups C, D; Class II, Groups E, F, G; Class III; Encl. Type 4 Optional: Certified Intrinsically safe for sensor mounting in ATEX.IECEx Zone 0, Ex ia IIB T4 Ga, hazardous location |
| Options | |
|---|---|
| Options: | Description: |
| Sensors | Intrinsic safety barriers for installation in Class I, Div 1, Groups C, D; Class II, Groups E, F, G; Class III; Encl. Type 4 hazardous locations. |
| Industrial Automation Protocols | Modbus RTU via RS-485 or HART (field selectable) |
| Sensor Cable | 15 m (50 ft) or 30 m (100 ft) continuous shielded coaxial pair, or splice up to 500 ft (152 m) with junction box. Self tunes to extended cable. |
| Enclosure Heater | For outdoor installation, thermostatically controlled to -40 °C (-40 °F) |
| Control Relays | 4 additional (6 total) rated 5 A SPDT |
| Product Brochure | Download |
| Datasheet | Download |
| Order Form | Download |
| Installation & Instruction Manual | Download |
| Engineering Specifications | Download |
| Pulsar Logger v3.0.0 Software (Formerly Greyline Logger) | Download |
| Software Brochure | Download |
| North America Electrical Safety Certificate | Download |
| North America Haz Loc Certificate | Download |
| ATEX Certification | Download |
| IECEx Certificate | Download |
| North America Haz Loc Certificate | Download |
| CE Declaration of Conformity | Download |
| Doppler and Transit Time for non-invasive measurement of flow in full pipes. | Download |
| The limestone slurry is abrasive so in-line flowmeters are not practical. Non-contacting Doppler flowmeters can be used both on the fly ash slurry supply lines and on "used" or recirculated slurry. | Download |
| Why use DFM 6.1 to measure RAS Flow? | Download |
| Greyline Enclosure Panel Mount Datasheet | Download |
| JB2X Sensor Cable Junction Box Datasheet | Download |
| SCR Enclosure Sun Screen Datasheet | Download |
| SP2 Surge Protection Datasheet | Download |
| Datasheet | Explosion Proof Enclosure | Download |
| Case Study | Flow Confirmation for Eel Pass Monitoring. | Download |
| Case Study | Influent and Effluent monitoring at Cat Lo Fishing Port | Download |
| Case Study | Slurry flow from outside the pipe with DFM 6.1 | Download |
| Case Study | Non-contacting sand slurry flow monitoring from outside the pipe. | Download |
| Case Study | Doppler flow meter provides successful results for a wastewater treatment plant. | Download |
| Case Study | DFM proves accurate and reliable for the dredging industry. | Download |
| Case Study | DFM 6.1 measures cement slurry in jet grouting process. | Download |
| Case Study | TTFM & DFM provide accurate flow solutions at a wastewater treatment plant. | Download |
| Case Study | Providing Graniterock with non-contacting flow measurement for clean water and flow from their thickener plant. | Download |
| Case Study | Non-contacting solution for plugged off flow meters in the oil patch. | Download |
| Pulsar Measurement Product Warranty | Download |
Electronics
- CE
- CSA/EN/UL 61010-1
Transducers
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Certified Non-incendive for Class I, Div 2, Groups A, B, C, D
Optional: Certified Intrinsically safe for Class I, Div 1, Groups C, D; Class II, Groups E, F, G; Class III; Encl. Type 4
Optional: Certified Intrinsically safe for sensor mounting in ATEX.IECEx Zone 0, Ex ia IIB T4 Ga, hazardous location
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