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:
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Adopting the advanced technology of data coding and verification, with high communication reliability
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Meeting EMC/ESD/EMI, the design requirements of electromagnetic compatibility for the electronic products, reaching the industrial leading level.
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Supper low power consumption design, no need of maintenance for the circuit.
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Water proof grade as IP 68, suitable for different complicated environment.
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Anti-drop and anti reverse flow.
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High sensitive and high endurance structure, with long lifetime.
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Anti-magnetic.
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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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