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Residential ultrasonic water
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Residential ultrasonic water meter (MEGA-W7)
Residential ultrasonic water meter (MEGA-W7) Residential ultrasonic water meter (MEGA-W7)

Residential ultrasonic water meter (MEGA-W7)

Item No.: 26.2
Designed for residential area with household metering and billing system, reached the demand of precise measurement and settlement on End-User for water utilities.
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Description Specifications Flow Range Dimension

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.
 

 
 
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

 
 
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




 





 
 
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