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.
Features
- 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.
Technical Specifications
| General Specifications | |
|---|---|
| Spec name: | Description: |
| Channel Types | Round pipe, rectangular, trapezoid, egg, or custom shapes |
| Electronics Enclosure | NEMA4X (IP 66) polycarbonate with clear, shatterproof cover |
| Accuracy | Level: ±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% |
| Display | White, back-lit matrix - displays flow rate, totalizer, relay states, operating mode, and calibration menu |
| Programming | Built-in 5-key calibrator 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 |
| Outputs | 3 Isolated 4-20 mA, 1000 ohm, (Flow, Level, and Velocity) or 0-5 V DC by menu selection |
| Control Relays | 2 Relays, form 'C' dry contacts rated 5 amp SPDT; programmable for flow proportional pulse (sampler/totalizer), flow, and/or level alarm |
| Data Logging | Programmable 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 Weight | 4.5 kg (10 lbs) |
| QZ02L Sensor Specifications | |
|---|---|
| Spec name: | Description: |
| Velocity Measurement Range | 0.031 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 Range | Minimum 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 Materials | 316 stainless steel, epoxy resin, polyurethane |
| Sensor Cable | 7.6 m (25 ft) submersible polyurethane jacket, shielded, 3-coaxial |
| Sensor Mounting | Includes MB-QZ stainless steel mounting bracket |
| Temperature Compensation | Automatic, continuous |
US 6979 
BR 2795 
CA 1619 
AU 1596 
TH 1501 
JP 1370 
SG 1140 
VN 749 
