Residential Ultrasonic Water Meters Brass body DN20 3/4″ R400
Maximized billing efficiency with our R400 Ultrasonic Water Meter (DN20 3/4″). Using static measurement technology with no moving parts, it offers zero wear and long-term stability. The premium brass body and high-ratio R400 ensure even the smallest leaks are detected, providing a maintenance-free, future-proof solution for residential smart metering.
- Dimensions
| Nominal Size | L (mm) | B (mm) | H (mm) | D (Thread) | d (Thread) |
|---|---|---|---|---|---|
| DN15 | 165 | 106 | 118 | R 1/2 | G 3/4 B |
| DN20 | 195 | 106 | 118 | R 3/4 | G 1 B |
| DN25 | 225 | 106 | 118 | R 1 | G 1 1/4 B |
Notes:The overall dimensions and weight are for reference only. The specific measurements shall be subject to the actual product.
- Metrological Performance
| Parameter | Unit | DN15 | DN20 | DN25 |
|---|---|---|---|---|
| Nominal Diameter (DN) | mm / inch | 15 / 1/2″ | 20 / 3/4″ | 25 / 1″ |
| Measurement Range (R) | Q3 / Q1 | 400 / 250 | 400 / 250 | 400 / 250 |
| Flow Ratio | Q2 / Q1 | 1.6 | 1.6 | 1.6 |
| Overload Flow Rate (Q4) | m³/h | 3.125 | 5.0 | 7.875 |
| Permanent Flow Rate (Q3) | m³/h | 2.5 | 4.0 | 6.3 |
| Transitional Flow Rate (Q2) | L/h | 10.0 / 16.0 | 16.0 / 25.6 | 25.2 / 40.3 |
| Minimum Flow Rate (Q1) | L/h | 6.3 / 10.0 | 10.0 / 16.0 | 16.0 / 25.2 |
| Maximum Reading | m³ | 999,999.9999 | ||
| Minimum Reading | m³ | 0.0001 | ||
| Pressure Loss | Δp | Δp63 | ||
| Maximum Operating Pressure (MAP) | — | MAP16 (16 bar) | ||
| Accuracy Class | — | Class 2 | ||
| Climatic & EMC Class | — | O, E2 | ||
| Flow Profile Sensitivity Class | — | U0 / D0 | ||
| Ingress Protection | — | IP68 | ||
| Maximum Water Temperature | °C | T30, T50, T70 (Default: T30) | ||
| Power Supply | — | DC 3.6 V Lithium Battery (single battery, service life ≥ 10 years) | ||
Note: For different Q₃ and R values, please contact the DEAZESU Team.
- Accuracy Curve
From Q1 inclusive up to but excluding Q2 is ± 5% for T30 ; From Q2 inclusive up to and including Q4 is ± 2% (From Q2 inclusive up to but excluding Q4 is ± 3% for T50).
- Pressure Loss Curve
- Dial Face Design
- Single-screen display: All information can be viewed without switching display interfaces.
- Multiple water volume display modes are available. Regardless of the selected display mode, the water meter continuously measures forward and reverse water volumes.
- The accuracy of reverse measurement meets the flow performance requirements of Class 2 water meters.
- Remote Transmission
