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DFM 5.1 Doppler Flow Meter
Brand: Pulsar Measurement
This model has been replaced by the new DFM 6.1 Transit Time Flowmeter.
Parts, service and tech support for the DFM 5.1 are still available.
Measure flow from outside a pipe.
The DFM 5.1 is designed for "difficult liquids" that would damage regular flow meters - wastewater, slurries, sludge, chemicals, viscous liquids and abrasives.
There is no obstruction to flow and no pressure drop.
The non-intrusive, clamp-on ultrasonic sensor fits any pipe 1/2" (12.5 mm) Inside Diameter or larger.
The electronics/display enclosure can be mounted nearby.
Use the isolated 4-20 mA to transmit flow to remote displays, recorders or controllers.
The programmable relays can be used for flow control, pump protection or flow proportionate pulse.
Calibration is easy with the built-in 5-key calibrator.
Display and totalize flow in your choice of engineering units (gallons, liters etc.)
Sensor cable can be extended up to 500 ft. (152 m) with no loss of signal.
The standard sensor is rated non-incendive for Class I, Division 2 hazardous locations and the DFM 5.1 can be equipped with optional Intrinsic Safety Barriers for sensor installation in Class I, Division I hazardous locations.
Other options include extra control relays and a built-in 2 million point Data Logger with USB output to Flash Drives.
The DFM 5.1 includes a new digital signal processor to filter background noise and interference, and to measure flow rates accurately in liquids containing gas bubbles or solids particles.
Features- Non-Contacting Ultrasonic Sensor
- Accurate and Verifiable
- Built-in 2-million point Data Logger and Windows Software
- USB Outputs to Flash Memory Sticks
- Isolated 4-20 mA/0-5 V Output
- 2 Programmable Control Relays
- Simple 5-key Calibration with Language Selection
Specifications
Brand
Flow Rate Range
- ± 0.1 ± 0.03 to 40 ft/sec (to 12.2 m/sec)
Pipe Size
- 1/2” to 180” (12.7 mm to 4.5 m)
Accuracy
- ± 2% of Reading or 0.1 ft/sec (0.03 m/sec)
Repeatability
- ± 0.1%
Linearity
- ± 0.5%
Display
- White, Backlit Matrix - Displays Flow Rate, Relay States, 16-Digit Totalizer, Operating Mode and Calibration Menu
Calibration
- Built-In 5-Key Calibrator with English, French or Spanish Language Selection
Power Input
- 100-240 50/60 Hz, 5 Watts Max. (with Standard Features)
Output
- Isolated 4-20 mA (1,000 ohm Load Max.)
Control Relays
- Qty 2, Rated 5 A , Programmable Flow Alarm and/or Proportional Pulse
Enclosure
- Watertight, Dust Tight 4X (66) with a Clear Face
Operating Temperature
- -10° to 140° F (-23° to 60° C)
Electrical Surge Protection
- Sensor, 4-20 mA Output and Power Input
