RF Card Prepaid Water Meter

Application

Radio frequency card prepaid water meter is the new measuring instrument employing the microprocessor to realize water collection, processing, display, and reserving. It is the best choice for realizing intelligent control by most of tap water administrative bureaus, ideal for enhancing public awareness of saving water. This meter has many patents. Compared with traditional way ,it can control user’s overspend by prepaying for an RF card.

Working conditions:

Water temperature

≤30℃ for cold water meter

≤90℃ for hot water meter

Working pressure: ≤10bar

Relative humidity: ≤90%

Feature:

• RF card water meter use prepaid way to achieve the new management mode of “purchase first, then use ”.
• Show the different level price of the water, one card can be used for several meters.
• Double reading display: mechanical and electronic reading
• Unique battery protection
• Stable performance, wide application, Class B accuracy.
• Low power consumption, long service time
• Electronic part is vacuum sealed.
• Anti-jamming and resist exterior magnet interference.

Maximum Permissible Error:

• In the lower zone from Q1 inclusive up to but excluding Q2 is ±5%
• If the temperature≤30℃, in the upper zone from Q2 inclusive up to and including Q4 is ±2%
• If the temperature>30℃, in the upper zone from Q2 inclusive up to and including Q4 is ±3%

Note: Technical data conform to ISO4064 standard.

Electrical Technical Data for RF Card Prepaid Water Meter

Working current	Low voltage protectio	Quiescent current	Battery voltage	Nominal Pressure	Water volume per 1 pulse signal
<20mA	2.8V	<15uA	3.6V	3.0V~3.6V	100L

Flow Technical Data:

Model No	R Flow turndow	Q4 Max Flow	Q3 Nominal Flow	Q2 Transitional Flow	Q1 Min Flow	Min Reading	Max Reading
	Q3/Q1	m³/h		m³/h		m³
LXSZ-15G/RF	80	3	2.5	0.05	0.031	0.0005	99999
LXSZ-20G/RF	80	5	4	0.08	0.005	0.0005	99999
LXSZ-25G/RF	80	7.9	6.3	0.126	0.079	0.0005	99999

Dimension

Size	Length L	Length L1	Width B	Height H	Connecting Thread
	mm
15	165	259	86	117	G3/4B	R1/2
20	195	299	86	117	G1B	R3/4
25	225	345	86	117	G1 1/4B	R1