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AVFM 6.1

Greyline AVFM 6.1 Area-Velocity Flow Meter

The area-velocity flow measurement method is the most common method of all flow measurements. The Greyline Area-Velocity Flow Meter uses a submerged ultrasonic sensor measuring both level and velocity of flowing liquid to calculate flow measurement in an open channel or pipe. The sensors are mounted either inside a pipe or at the bottom of a channel. Just enter the pipe diameter or channel dimensions into the accompanying control unit, and the Area-Velocity Flow Meter automatically computes and displays flow measurement. 

The AVFM 6.1 is suitable for open channel flow applications such as influent flow monitoring, effluent flow monitoring, wastewater, stormwater, industrial wastewater applications, and irrigation water flow measurement. Its easy-to-use, menu-driven setup means that the AVFM 6.1 Area-Velocity Flow Meter is just minutes away from giving you that all-important flow measurement result.

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  • No flume or weir required – submersible ultrasonic sensor measures velocity and level simultaneously to calculate flow. No moving parts to wear, foul, or clog.
  • The built-in 5-button keypad, intuitive menu, and large backlit LCD display make the Greyline AVFM 6.1 the most operator-friendly area-velocity flow meter on the market.
  • Fast, simple, installation and set-up.
  • Improved performance in a wider range of operating conditions.
  • At a glance, view flow rate, velocity, level, totalizer, relay status, and important diagnostic information on the LCD display.
  • Three isolated 4-20 mA outputs for flow rate, velocity, and level, and two relay outputs for pulse output or alarm.
  • 6.5 million point data logger for greater flexibility of data monitoring, control, and reporting.
  • Min, Max, and Total Flow data from the last 365 days is available on the LCD display, or download directly to a USB for easy reporting.
  • Monitors flow rate, volume total, run hours, and diagnostic information through only two wires with the optional Modbus RTU serial communication output.
General Specifications
Spec name:Description:
Channel TypesRound pipe, rectangular, trapezoid, egg, or custom shapes
Electronics EnclosureNEMA4X (IP 66) polycarbonate with clear, shatterproof cover
AccuracyLevel: ±0.25% of reading or ±0.08 in, whichever is greater. Repeatability & Linearity 0.1%.
Velocity: ±2% of reading or ±0.012 m/s (0.04 ft/s), whichever is greater. Requires solids or bubbles minimum size of 100 microns, minimum concentration 75 ppm. Repeatability & Linearity 0.5%
DisplayWhite, back-lit matrix - displays flow rate, totalizer, relay states, operating mode, and calibration menu
ProgrammingBuilt-in 5-key calibrator with English, French, or Spanish language selection
Power Input100-240 V AC 50/60 Hz, 10 VA maximum.
Optional: 9-32 V DC, 10 W maximum
Outputs3 Isolated 4-20 mA, 1000 ohm, (Flow, Level, and Velocity) or 0-5 V DC by menu selection
Control Relays2 Relays, form 'C' dry contacts rated 5 amp SPDT; programmable for flow proportional pulse (sampler/totalizer), flow, and/or level alarm
Data LoggingProgrammable 26 million point data capacity, time and date stamped plus formatted flow reports including Total, Average, Minimum, Maximum, and times of occurrence. Includes USB output to Flash Drives and Windows software
Operating Temperature (Electronics):-20 °C to 60 °C (-5 °F to 140 °F)
Approximate Shipping Weight4.5 kg (10 lbs)

QZ02L Sensor Specifications
Spec name:Description:
Velocity Measurement Range0.031 m/s to 6.2 m/s (0.1 ft/s to 20 ft/s) and reverse flow to -1.5 m/s (-5 ft/s) in fluids containing bubbles or solids with a minimum size of 100 microns and a minimum concentration of 75 ppm to act as acoustic reflectors
Level Measurement RangeMinimum Head: 25.4 mm (1 in). Maximum Head: 4.57 m (15 ft)
Operating Temperature-15 °C to 80 °C (5 °F to 175 °F)
Exposed Materials316 stainless steel, epoxy resin, polyurethane
Sensor Cable7.6 m (25 ft) submersible polyurethane jacket, shielded, 3-coaxial
Sensor MountingIncludes MB-QZ stainless steel mounting bracket
Temperature CompensationAutomatic, continuous
Options
Options:Description:
Industrial Automation ProtocolsModbus RTU via RS-485
Sensor Cable15 m (50 ft) or 30 m (100 ft) submersible, continuous from Sensor - or splice up to a total of 150 m (500 ft) length
Sensor Cable Junction BoxNEMA4 polycarbonate with connection terminal strip
Enclosure HeaterThermostatically controlled to -40 °C (-40 °F); recommended for temperatures below 0 °C (32 °F)
Intrinsic Safety BarriersFor Sensor mounting in Class I,II,III, Div. I,II, Groups C,D,E,F,G hazardous locations
SensorsSeparate non-contacting ultrasonic level sensor and submerged velocity sensor
Sensor Mounting BandsStainless steel sensor mounting bands for pipes 150 mm to 1800 mm (6 in to 72 in) diameter
AVFM 6.1
Product Brochure
Greyline Logger
Software Brochure
AVFM 6.1
Datasheet
AVFM 6.1
Order Form
AVFM 6.1
Installation & Instruction Manual
AVFM 6.1
Engineering Specifications
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Greyline Logger Software
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Warranty
Pulsar Product Warranty
SP4 Surge Protection
Datasheet
VSJ Half-Pipe Mounting Bands
Datasheet
VSJ Pipe Mounting Band
Datasheet
Explosion Proof Enclosure
Datasheet
Greyline Enclosure Panel Mount
Datasheet
SCR Enclosure Sun Screen
Datasheet
  • CE
  • CSA
  • UL
  • EN 61010-1

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