IC card water meter

·Metering Performance

·Nominal caliber

·DN15、DN20、DN25

Nominal flow rate (Q₃)

·DN15：2.5m³/h；DN20：4m³/h；DN25：6.3m³/h

Boundary flow rate (Q₂)

·DN15：0.04m³/h；DN20：0.064m³/h；DN25：0.1008m³/h

Minimum flow rate (Q₁)

·DN15：0.025m³/h；DN20：0.04m³/h；DN25：0.063m³/h

·Accuracy class

·Level 2 (compliant with national standard GB/T 778-2018)

·IC Card Related Parameters

·Card type

·Contactless IC Card

·Card Reading Distance
 (Contactless)

·0-5cm

·Data Storage Lifespan

·≥10 年

·Number of Card Reads

·≥10 万次

·Electrical Performance

·Operating Voltage

·Built-in lithium battery: 3.0V

·Battery Life

·≥6 years (meets water meter service life requirements)

·Operating Current

·≤100mA during card reading/valve closing, ≤10μA in sleep mode

·Environmental
Parameters

·Operating Temperature

·Cold water meter: 0.1℃～30℃; Hot water meter: 30℃～90℃

·Operating Humidity

·≤95%(non-condensing)

·Protection Rating

·IP68 (can withstand short-term immersion, meets underground installation requirements)

·Valve Performance

·Valve Type

·Ball valve (stainless steel)

·Valve Closing Pressure

·≤1.0MPa

·Valve Lifespan

·≥5000 Secondary switch