[Product introduction]

NB IOT electronic intelligent remote valve controlled water meter adopts advanced narrowband Internet of things cellular communication technology. It does not need centralized mining equipment. It is directly connected to the public network through wireless access of mobile operators. Users can easily realize all kinds of data interaction by deploying cloud platform meter reading system, which is simple and efficient. The electronic water meter adopts dual module and dual battery power supply design. The metering module is powered by 3V lithium manganese battery and is responsible for metering, display and NFC communication; NB IOT communication module is powered by high-capacity 3.6V lithium argon battery, which is responsible for valve switching and wireless communication.

NB IOT electronic intelligent remote valve controlled water meter has the functions of regular reporting and forced wake-up reporting, supports two charging modes of prepayment and post payment, supports active and passive valve control, and has valve maintenance function. Users use handheld or mobile phone with NFC function to set and read relevant parameters through NFC communication function.

[Functional features]
● NB IOT communication: the water meter interacts with the cloud platform meter reading system through the operator;
● NFC communication: handset or mobile phone sets and reads water meter system parameters through NFC function;
● High precision metering, with a minimum accuracy of liters;
● Valve opening and closing: the cloud platform meter reading system commands to open and close the valve;
● Valve maintenance: perform valve maintenance through magnet wake-up or cloud platform meter reading system command;
● Regular data reporting: the water meter automatically starts data reporting at the set time;
● Forced wake-up data reporting: if necessary, the user can forcibly start data reporting at the water meter;
● Battery undervoltage prompt: LCD displays the battery voltage in real time;
● Magnetic interference prompt: when the water meter is subject to external magnetic interference, the LCD displays "interference";

● Replaceable battery: independent battery compartment, flexible and convenient battery replacement

[Technical parameters]

No.	Performance	Parameter
1	working voltage	Metering power supply: lithium manganese battery 3V NB IOT module: lithium argon battery 3.6V
2	Range ratio	R200\R160\R125\R100\R80
3	Measurement accuracy	0.01L
4	Maximum dosage range	99999.99999m³
5	Standby current	a)Metering module：≤10uA； b)NB-IoTmodule: ≤15uA
6	LCD display mode	Regular display
7	Operator	Telecom / Mobile
8	SIM card Tariff	7 years
9	Maximum transmission power	≤17dBm
10	Receiving sensitivity	≥-107dBm
11	Protocol	CJ/T188，Coap
12	Operation temperature	-5℃～+55℃
13	Storage environment	temperature：-25℃～+55℃；humidity：0～93%±3%RH
14	Battery life	≥7years
15	Accuracy grade	2
16	Degree of protection	IP68
17	Electromagnetic environment grate	E2
18	Product standard	GB/T 778-2018
19	Pressure loss	0.063MPa

[Flow parameters]

Water Meter Model	Nominal Diameter DN	Q3/Q1	Overload flow Q4	Common Flow Q3	Boundary flow Q2	Minimum flow Q1	Minimum reading Min	Maximum reading Max
	mm		m³/h		L/h		m³
LXSY-15	15	80	3.125	2.5	50	31.25	0.00005	99999
		100			40	25
		125			32	20
		160			25	15.625
LXSY-20	20	80	5	4.0	80	50
		100			64	40
		125			51.2	32
		160			40	25
LXSY-25	25	80	5	6.3	80	50
		100			64	40
		125			51.2	32
		160			40	25
		160			160	100

【Overall dimension】

Model	Nominal diameter	Length	Width	Height	Connecting thread		weight（kg）
	（mm）				d	D
LXSXY-15	15	165	105	151	R1/2	G3/4	1.4
LXSXY-20	20	195	105	151	R3/4	G1	1.5
LXSXY-25	25	225	105	151	R3/4	G1	1.8
Note: the overall dimensions and weight are for reference only, and the real object shall prevail.