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MEGA-W7 Residential Ultrasonic Water Meter is designed for the residential area with household metering and billing system, reached the demand for precise measurement and settlement on End-User for water utilities.
- Approved according to GB/T 778-2007 and MID certification;
- The low starting flow, minimum flow rate is lower than the 1/3 of the traditional water meter;
- Bi-directional flow measurement;
- Have water temperature detection and temperature alarm;
- No moving parts, no wear, can be long-term and stable operation;
- More than 10 years battery operated life span;
- Be installed at any angle, the measurement accuracy is not affected;
- Ultrasonic signal quality detection;
- Magnetic induction button;
- The overall IP68 design, long-term immersion in the work;
- Support optical, wired & wireless M-Bus, RS485, 4-20mA, LoRa, NB-loT and pulse interfaces;
- Complies to MODBUS RTU and EN 13757 communication protocol;
- Comply to drinkable water standard requirement;
- LCD screen can be changed by touching the magnetic switch.
SPECIFICATIONS
| Precision Class | class 2 |
| Standards | MID (OIML R49, EN 14154, ISO4064) |
| Volume Display Options |
1. Net (Forward less reverse) 2. Forward only 3. Forward & reverse alternating |
| Temperature grade | T50（T30 optional） |
| Pressure loss grade | Δp40 |
| Power Source | 3.6V Li-battery: 10* years Or additional power supply 24VDC |
| Environmental Protection | IP68 (Additional 24VDC power supply, IP65) |
| Ambient operation temp | Class C (class B, class I optional) |
| Maximum working pressure | 1.6MPa |
| Range ratio （qp：qi） | 250:1 |
| Data Logger |
Volumes: 480 Daily data; 36 Monthly data; 16 Yearly data Alarms data: 32 |
| Maximum flow reading (m3) | Forward: 99999.99999; Reverse:-9999.99999 |
| Electromagnetic environment level | Class E1(class E2 optional) |
| * remark | The battery must be in normal ambient temperature conditions, also depends on the data transmission frequency and correct meter battery installation (positive electrode on the top) |
| Standard interface | Infra-red, M-Bus, RS485 |
| Analog output | 4~20mA: The Analog Output shows the currently measured flow rate |
| Wireless interface |
Wireless M-Bus: T1 868MHz LoRa:470MHz NB-IoT |
| Digital (pulse) Output | OC: Volume |
Flow Range
| Nominal diameter DN(mm) | 15 | 20 | 25 | 32 | 40 |
| Maximum flow Q4( m3/h) | 3.125 | 5 | 7.875 | 12.5 | 20 |
| Common flow Q3( m3/h) | 2.5 | 4.0 | 6.3 | 10.0 | 16.0 |
| Boundary flux Q2( m3/h) | 0.016 | 0.026 | 0.04 | 0.064 | 0.102 |
| Minimum flow Q1( m3/h) | 0.01 | 0.016 | 0.025 | 0.04 | 0.064 |
| Pressure loss grade Δp | 40 | 40 | 40 | 40 | 40 |
Dimension
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