Electronic Water Flow Meter
WMD15 to WMD50 is a complete electronic water meters without registers, measures cold (hot) potable water for residential application in sizes 15mm to 50mm.
Features:
Adopting the advanced technology of data coding and verification, with high communication reliability
Meeting EMC/ESD/EMI, the design requirements of electromagnetic compatibility for the electronic products, reaching the industrial leading level.
Supper low power consumption design, no need of maintenance for the circuit.
Water proof grade as IP 68, suitable for different complicated environment.
Anti-drop and anti reverse flow.
High sensitive and high endurance structure, with long lifetime.
Anti-magnetic.
Designed as the function of flow meter.
Standard Compliance
Technical data conforms to ISO 4064 Class B, Class C, R80, R100, R125 or R160 standard for horizontal installation.
Optional Features
*Several lengths and connections available on request
*Non return Valve
*Pulse output option: reed switch; hall or non-magnetic metal plate.
*Meter body: Brass, plastic, iron and stainless steel for selecting.
Working Conditions
Water temperature: ≤50ºC for cold water meter
Water temperature: ≤90ºC for hot water meter
Water pressure: ≤1MPa or 1.6MPa optional (10bar or 16bar optional) Installation requirements
*The meter should be installed in horizontal position with the direction of the flow as indicated by the arrow cast in the meter body with the register face upwards.
*Pipeline must be flushed before installation. *The meter should be constantly full of water during operation.
Maximum Permissible Error
In the lower zone from Qmin(Q1) inclusive up to but excluding Qt (Q2) is ±5%. In the upper zone from Qt(Q2) inclusive up to and including Qmax(Q4) is ±2%(cold water meter).
In the upper zone from Qt(Q2) inclusive up to and including Qmax (Q4) is ±3% (hot water meter). 
Accessories
Each water meter has one set couplings optional: 2pcs tube, 2pcs nut and 2pcs gasket
MAIN TECHNICAL DATA According to ISO4064 :2003 (Old Standard)
| Size | Inch | Class | Qmax | Qn | Qt | Qmin | Min reading | Max reading |
| Maximum flow | Nominal flow | Transitional flow | Min flow | |||||
| DN(mm) | m³/h | L/h | m³ | |||||
| 15 | 1/2" | B | 3 | 1.5 | 120 | 30 | 0.00005 | 99999 |
| C | 22.5 | 15 | ||||||
| 20 | 3/4" | B | 5 | 2.5 | 200 | 50 | 0.00005 | 99999 |
| C | 37.5 | 25 | ||||||
| 25 | 1" | B | 7 | 3.5 | 280 | 70 | 0.00005 | 99999 |
| C | 52.5 | 35 | ||||||
| 32 | 11/4" | B | 12 | 6 | 480 | 120 | 0.00005 | 99999 |
| C | 90 | 60 | ||||||
| 40 | 11/2" | B | 20 | 10 | 800 | 200 | 0.00005 | 99999 |
| C | 150 | 100 | ||||||
| 50 | 2" | B | 30 | 15 | 3000 | 450 | 0.00005 | 99999 |
| C | 225 | 90 | ||||||
MAIN TECHNICAL DATA According to ISO4064:2005 (New Standard)
| DN | Mm | 15 | 20 | 25 | 32 | 40 | 50 |
| SIZE | Inch | 1/2" | 3/4" | 1" | 11/4" | 11/2" | 2" |
| Q4(m³/h) | 3.125 | 5 | 7.875 | 12.5 | 20 | 31.25 | |
| Q3(m³/h) | 2.5 | 4 | 6.3 | 10 | 16 | 25 | |
| R80 | Q2(L/h) | 50 | 80 | 126 | 200 | 320 | 500 |
| Q1(L/h) | 31.25 | 50 | 78.75 | 125 | 200 | 312.5 | |
| R100 | Q2(L/h) | 40 | 64 | 100.8 | 160 | 256 | 400 |
| Q1(L/h) | 25 | 40 | 63 | 100 | 160 | 250 | |
| R125 | Q2(L/h) | 32 | 51.2 | 80.64 | 128 | 204.8 | 320 |
| Q1(L/h) | 20 | 32 | 50.4 | 80 | 128 | 200 | |
| R160 | Q2(L/h) | 25 | 40 | 63 | 100 | 160 | 250 |
| Q1(L/h) | 15.62 | 25 | 39.37 | 62.5 | 100 | 156.2 | |
| Min reading(m³) | 0.00005 | 0.00005 | 0.00005 | 0.00005 | 0.00005 | 0.00005 | |
| Max reading(m³) | 99999 | 99999 | 99999 | 99999 | 99999 | 99999 | |
| Max pressure(MAP) | 16 | 16 | 16 | 16 | 16 | 16 | |
| Max loss(ΔP) | 63 | 63 | 63 | 63 | 63 | 63 | |
| Max temperature | T50 | T50 | T50 | T50 | T50 | T50 | |
| Pulse output option | reed switch | Vmax=24V, Imax=100mA, Pmax=2W | |||||
| hall | / | ||||||
| non-magnetic metal plate | / | ||||||
Dimensions and Weight
| Meter Size | Length (L) | Width (B) | Height (H) | Connecting Thread |
| mm | mm | D | ||
| 15 | 165/190 | 98 | 104 | G 3/4B |
| 20 | 190/195 | 98 | 106 | G 1B |
| 25 | 260/225 | 103 | 115 | G1 1/4B |
| 32 | 260/230 | 103 | 115 | G1 1/2B |
| 40 | 300/245 | 124 | 153 | G 2'B |
| 50 | 300 | 124 | 153 | G2 1/2 B |
| 280 | 165 | 175 | Flange connecting GB 4216.4 | |
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