Specifications
| Ultrasonic Open Channel flowmeter | |
| Model | GNST-MQ-LLJ |
| Flow Range | 0.1 L/s ~ 10 m³/s |
| Total Flow Range | 12-digit decimal, auto-reset when full |
| Flow Accuracy | ±1~3% (determined by the matching weir trough specification) |
| Max Ultrasonic Ranging | 3 m |
| Probe Blind Zone | ≤0.4 m |
| Ranging Error | ±0.3% (within 3 m range) |
| Resolution | 1 mm |
| Degree of Protection | IP65 |
| Data Query | Total flow can be queried by year, month, day, or hour |
| Output Signal | 4-20 mA (transmits instantaneous flow) and RS485 (transmits instantaneous & total flow) |
| Relay Output | 1~4 channels (please specify when ordering if required) |
| Operating Temp. | -20°C ~ 55°C |
| AC/DC Power Supply | AC: 220V 50Hz; DC: 12-36V / 3W |
Product features
1. 4 weir types compatible (triangular/rectangular/uniform-width/Parshall flume) for varied flows
2. Non-contact: No water interference, easy to use
3. Durable: ABS, IP66 (waterproof/moisture-proof), long lifespan
4. Precise & stable: ±1~3% accuracy, -20℃~55℃ adaptability
5. Versatile: 0.1L/s~10m³/s range, multi-data query, multi-signal output, customizable weirs

Installation instructions
Parshall Flume Installation Requirements
1.Install horizontally in the channel; fill surroundings with concrete
2.Outlet must be lower than flume bottom (no water retention); same for rectangular/triangular weirs
3.Mount meter/probe away from frequency converter/power interference
Ensure steady channel flow (no foam)




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