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[China]
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Address: No.270, Huangjinkou 3rd Village, Hanyang District, Wuhan City, Hubei Province, China
Contact name:Ada Yang
WUHAN RADARKING ELECTRONICS CORP. |
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DN15mm 20mm 25mm Wireless Intelligent LoRaWan Smart Water Meter for House
Newest LoRaWAN Solution V1.2.pdf
Introduction
The wireless intelligent water meter consists of remote basic water meter, wireless communication modules and other components. This product can complete the data collection of point-to-point through the gateway with low power consumption, long life and two-way data transmission. It provides reliable protection for the accurate collection of real-time data; Wireless water meter uploads data to the gateway everyday automatically, then the gateway uploads data to the network platform automatically; This product is simple in structure, easy to maintain and replace, and connect with no cables. So, it is easy to install.
Specification
1. Operating environment:
Water temperature: 0.1℃～30℃
Protection grade: IP68
2. Operation water pressure: 0.03MPa~1.0MPa
3. Pressure loss: ≤0.1MPa
4. Main Parameters:
| Power Consumption | Static current consumption (wireless module doesn’t include counting sensor) | ≤10µA |
| Wireless current receiving power consumption | ≤18mA | |
| Wireless current emission power consumption | About 120mA | |
Wireless Performance Parameter
| RF center frequency | 433MHz |
| Modulation | LORA | |
| Frequency bandwidth | 125KHz,250KHz can be optional | |
| RF power | 20dbm(100mW) (Typical) | |
| Transmission rate | 0.25-50kbps (LoRaWAN) | |
| Receiver sensitivity | -143dBm @SF12/BW 125KHz | |
| Power supply | 3.6V lithium battery | More than 10 years |
| Sampling Method | Hall sensor, double pulse | Pointer sampling at 0.01, addend when positive rotation, subtrahend when inverse rotation. |
5. Range ratio and flow range
(DN) mm | Q3 /Q1 | Overload Flow Q4 | Common Flow Q3 | Demarcation Flow Q2 | Min Flow Q1 | Display | |
| Min m3 | Max m3 | ||||||
| m3/h | m3 | ||||||
| 15 | 80 | 3.125 | 2.5 | 0.05 | 0.031 | 0.0001 | 9999.9999 |
| 100 | 0.04 | 0.025 | |||||
| 20 | 80 | 5 | 4 | 0.08 | 0.05 | ||
| 100 | 0.064 | 0.04 | |||||
| 25 | 80 | 7.875 | 6.3 | 0.126 | 0.079 | ||
| 100 | 0.10 | 0.063 | |||||
6. Electromechanical Conversion Error ≤±0.5m3
7. Allowable Maximum Error:
From the minimum flow to the low zone that does not include the demarcation flow: ±5%;
From the demarcation flow to the high zone including the overload flow: ±2%.
8. Communication Distance:
City transmission distance: About 2km
The number of floors crossed: About 15 floors
9. Power Supply: The gateway needs an external 220V power supply;
10. All prepaid costs are stored in the meter reading system. Based on the collected data of water consumption, it is determined whether the user owes fees.
Communication Introduction
LoRaWAN is a set of communication protocols and system architectures designed for LoRa long-distance communication networks.
When the module is powered on, it automatically sends a join packet. If no reply from the gateway to the network, the join packet will be sent in intervals. After the module receives the network access permission message by the gateway, it pushes a packet of heartbeat data; Since then, it starts timing. Actively push a pack of heartbeat data at intervals of 6 hours.
The data upload mechanism can be timed or quantitative or both, and can also be customized on demand.
1. Frame Format(DL/T645-2007)
| Specification | Code |
| Frame initiator | 68H |
Address domain
| A0 |
| A1 | |
| A2 | |
| A3 | |
| A4 | |
| A5 | |
| Frame initiator | 68H |
| Control code | C |
| Data field length | L |
| Data field | DATA |
| Check code | CS |
| Terminal code | 16H |
* Address field A0 to A5: Communication address of the meter.
2. Device uploads packets
| Name | Data | Instruction |
| Leading | FEFEFEFE | |
| Frame initiator | 68H | |
| Address | A5 A4 A3 A2 A1 A0 | Low byte first when sending |
| Frame initiator | 68H | |
| Control code | 91H | |
| Length | 0CH | |
| Data identification | 00004200 | Low byte first when sending |
| Data (Note 1) | XXXXXXXX | Low byte first when sending |
| Status word (Note 2) | XXXX | Low byte first when sending |
| Battery voltage | XX | 15.37×xxH=xxxxxmV |
| Reserved bytes | XX | |
| Checksum | CS | |
| Terminal code | 16H |
Note1: The data format is defined as follows:
| Data Format | Code System | Unit | Remarks | |
| Accumulated Water Meter Reading | XXXXXXXX | BCD | Tons | Cumulative water consumption The decimal place defaults to 2 bits of data. The format is: XXXXXX.XX |
Note2: Status word is defined as follows:
| ST0 | D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 | |
| Definition | Mandatory state | Strong magnetic interference | Overdraft status | Alarm status | Voltage | Valve status | |||
| Instruction | Reserved | 0:no mandatory 1: Forced | 0: normal 1: Overdraft | 0: normal 1: Overdraft | 0: normal 1: alarm | 0: normal 1:Under voltage
| 00: open 01: Off 11: Abnormal | ||
| ST1 | D7 | D6 | D5 | D4 | D3 | D2 | D1 | ||
| Definition | |||||||||
| Instruction | Reserved | Reserved | Reserved | Reserved | |||||
DN (mm) | Length (mm) | Height (mm) | Thread D | Length of connection thread (mm) | |
| A.min | B.min | ||||
| 15 | 165 | 86 | G3/4B | 10 | 12 |
| 20 | 195 | 86 | G1B | 12 | 14 |
| 25 | 225 | 86 | G11/4B | 12 | 16 |
Why Choose Us:
1. As a leading meters manufacturer, our products including: Energy Meter, Smart Electronics Meter, Smart Water Meter, Gas Meter and AMR system.
2. We own the factory and a R&D group of more than 30 persons.
3. We have 260 sets of production and testing equipments.
4. we have a high efficiency, innovative, serious management team and guarantee after-sales service.
