Greyline AVFM 6.1 Area-Velocity Flow Meter
Measures Velocity and Level to Monitor Flow with a single Ultrasonic Sensor
Measure flow through partially filled pipes, channels, canals, and turnouts without a flume or weir. The AVFM 6.1 uses a submerged ultrasonic sensor to continuously measure both Velocity and Level in the channel. The sensor resists fouling, corrosion and abrasion. The flow meter can be configured with the standard submerged velocity-level sensor or with submerged velocity plus a separate non-contacting ultrasonic level sensor, for highly aerated fluids or those with high concentration of suspended solids.
View flow rate and total flow on the large backlit LCD display and connect to external devices with three 4-20mA outputs and two control relays. Flow rate, volume, run hours, and diagnostic information available through the optional Modbus RTU serial communications.
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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 0.01 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 | 0.03 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 8520 
GB 8342 
CA 7572 
AU 7310 
IE 5242 
NZ 3428 
BR 1912 
CN 1136 
