Introduction:

NB IoT Narrowband IoT Smart Meter is a new generation IoT technology smart meter launched by Yima, which adopts the world's most advanced narrowband cellular communication technology. The smart water meter mainly consists of five parts: power management circuit, valve switch automatic control circuit, data acquisition circuit, battery level detection circuit, and NB IoT module driving circuit. When there is insufficient balance or battery circuit power, the valve will automatically close and a warning frame will be uploaded to the user, prompting the user to recharge or replace the battery. After the user pays, the water meter will automatically open the valve.

Technical parameters of narrowband IoT smart water meter:

(1) Nominal caliber: DN15, DN20, DN25;

(2) Relative error:

(a) The maximum allowable error from the low flow zone including the minimum flow to the boundary flow (excluding) is ± 5%;

(b) The maximum allowable error is ± 2% when the water temperature is ≤ 30 ° C, from the high flow zone including the boundary flow to the overload flow (inclusive); When the water temperature is greater than 30 ° C, the maximum allowable error is ± 3%;

(3) Working temperature: Cold water meter: (0.1-30) ℃;

(4) Work pressure: ≤ 1.0MPa；

(5) Pressure loss: ≤ 0.063MPa；

(6) Installation environment: Class B - installed indoors;

(7) Electromagnetic environment: E1- Residential, commercial, and light industrial;

(8) Working current: Static:< 10uA；

(9) Sensitivity level of flow profile: U10、D5；

(10) Storage environment temperature: (5-50) ℃.

Advantages of Narrowband IoT Smart Water Meter Function:

1. Basic functions include power on/off, operator network selection, information display, etc.

2. Support for short message service: NB IoT terminals that support mobile short message service should be able to send and receive short messages normally.

3. Support for mobile data services: NB IoT terminals that support mobile data services should be able to provide data transmission operations.

4. Operator network selection function: For NB IoT terminals, the selection and registration of the operator network should be completed through automatic network selection.

5. Battery and charging information display: For NB IoT terminals with rechargeable batteries and screen displays, they should support battery capacity and charging information display functions, and should have alarm prompts when the battery capacity is insufficient. The battery capacity indicator should change in the same trend as the amount of electricity inside the battery. Both on and off states should be able to charge the battery, and during the charging process, the terminal should have an indication that the battery is being charged.

Narrowband IoT smart water meter price reference standard:

1. Iron shell DN15 caliber: 200 to 300 yuan per piece; Copper shell DN15 caliber: 150 to 200 yuan per piece;

2. Iron shell DN20 caliber: 300 to 400 yuan per piece; Copper shell DN15 caliber: 250 to 300 yuan per piece;

3. Iron shell DN25 caliber: 450 to 500 yuan per piece; Copper shell DN15 caliber: 300 to 350 yuan per piece.

The deep integration of the Internet of Things and the water industry has become an inevitable trend, opening up infinite possibilities for practical applications. With the development of transmission technology, all kinds of IoT sensing instruments have been upgraded and their functions have been improved, especially after the Internet communication protocol IPV4 has been upgraded to IPV6, which has laid the foundation for the interconnection between people, people and things, and things and things. We are about to enter the era of interconnection of everything and will integrate into our life in the near future.