DFM 6.1 Doppler Flow Meter
The DFM 6.1 Doppler Flow Meter from Pulsar Measurement accurately measures the flow rate of ‘complex’ fluids with suspended solids or entrained air. This clamp-on, ultrasonic non-contacting, flow meter measures flow from outside a pipe with no contact with process fluid.
Contact Van WaltAdvantages
- Doppler technology sends a signal through the pipe wall and is reflected off the particles within the liquid, the change in frequency is reflected on the controller in the form of pipe flow measurement
- Ideal to monitor flow for ‘difficult’ liquids, or liquids with suspended solids such as wastewater, slurries, sludge, chemicals, viscous liquids, and abrasives
- Clamps on the outside of any pipe 12.5 mm inside diameter or larger
- Obtains flow measurement readings without interrupting the process
- Easy-to-follow, 5-button menu keypad to make setting up quick and easy
- Works on the majority of pipe materials
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DFM 6.1 Doppler Flow Meter Equipment Options:
Specifications
General Specifications
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%
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
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
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
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
Options
Options
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
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