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LXSZ-K7 Prepayment Water Meter with Smart Card

As a horizontal dry dial multi-jet water meter, our LXSZ-K7 prepayment water meter with smart card is applicable for measuring flows of cold potable water. It features advantageous reliable measurement performance for revenue billing in domestic applications. An internal valve is provided for realizing the prepaid management function. This prepayment water meter is produced according to the ISO 4064:2005 and BS 5728, while its IC card is designed in line with the ISO 7816.

LXSZ Performance Characteristics
Meter size/Nominal flow rate Qn m3/h 1.5 2.5 2.5
Q3 m3/h 2.5 4 4
Nominal size DN mm 15 20 25
DN inches 1/2 3/4 1
Maximum flow rate Qmax/Q4 ±2% m3/h 3/3.125 5/5 5/5
Transitional flow rate Qt/Q2 ±2% l/h 50/501) 80/801) 80/801)
Minimum flow rate Qmin/Q1 ±5% l/h 30/31 50/50 50/50
Measuring range Q3/Q1 H R80 R80 R80
Continuous load approx. 1.6╳Qn l/h 2500 4000 4000
Q3 l/h 2500 4000 4000
Maximum registration 99999.9999 99999.9999 99999.9999
Maximum LCD display 999999.9 999999.9 999999.9
Pressure classes MAP PN MPa 1.0 1.0 1.0
PN bar 10 10 10
Pressure loss classes Δp63(not exceed 0.063MPa, at any flow rate within the range Q1 to Q3)
Temperature classes MAT MAT(Cold) T30 T30 T30
MAT (Hot) T30/90 T30/90 T30/90
Maximum water temperature (maximum of 2 hours) Tmax(Cold) 50 50 50
Tmax(Hot) 95 95 95
Climate conditions RH 93% 93% 93%
Waterproof protection IP55 IP55 IP55
ISO 4064 Class B
Meter size/Nominal flow rate Qn M3/h 1.5 2.5 2.5
Nominal size DN mm 15 20 25
DN inches 1/2 3/4 1
Transitional flow rate Qt ±2% l/h 120 200 200
LXSZ Electronic Performance
Power source Lithium thionyl chloride battery
Battery lifetime Typically over 6 years
Battery voltage 3.6 V
Max. current at static working status 15μA
Pulse input 0.1m3/p
LCD working temperature -20℃ to 60℃
Valve lifetime Exceeding 10,000 times
Nominal size DN mm 15 20 25
DN inches 1/2 3/4 1
Meter connection thread ISO 228/1 inches G3/4B G1B
Connection pipe thread ISO 7/1 inches R1/2 R3/4 R1
L Meter length mm 165 195 225
L1 Distance Card end to meter body mm 78 54 50
W Width mm 88 88 88
H1 High mm 120 120 120
H2 High(lid opened) mm 203 203 203

1. Alarm: Low battery alarm, low amount alarm
2. Hoard limitation: To avoid large amount water purchase on purpose
3. Credit (optional): Customer can continue to use some quantity of water after the prepaid water finished, and these consumed quantities will be deducted from next purchase
4. Data collection: Read history consumption data of last 12 months
5. Abnormal inspection: Our prepayment water meter will detect and record automatically when there is strong magnetic put close to meter as well as other abnormal conditions happened. 
6. Valve maintenance: The valve will be actuated regularly to avoid dirt accumulation in the valve. 
7. One card solution: Support one card to match the Wasion water, electricity and gas meters

Robust Construction
The LXSZ prepayment water meter is manufactured from the highest quality materials for maximum resistance to wear and corrosion. It is satisfactory to resist the flow disturbances.

Prepaid Management Function
The valve will be closed when the prepaid water finished. Use the Wasion prepaid management system, the user purchase and recharge to continue to use water.

Wasion has taken the lead in manufacture and marketing of energy meter instruments. We produce and sell 10 million sets of various metering devices. OEM and ODM requests are acceptable. 

WILLFAR as a well qualified prepaid smart water meter manufacturer, mainly manufacture water meter, electricity meter, gas meter and data management instrument, like data logger, data concentrator, data collector. To serve daily life much better, WILLFAR company also provides smart meter system and custom energy efficiency management solutions in client demands.

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