Smart Water Meter with AMR/Ami Application (LoRa, LoRaWan, NB-IoT...)

• Install: Horizontal
• Medium Temperature: Cold Water
• Level Measurement: C
• Counter Instructions: Analogue
• Nominal Diameter: 15-50mm
• Application: Civil
• Model NO.: AMR/AMI water meter
• Principle: Speed of Water Meter
• Medium Pressure: General Water Meter
• Work Environment: Dry Water Meter
• Stucture: Wireless Communicating
• Transport Package: Pallet
• Specification: CE approval
• Trademark: NWM or OEM
• Origin: Ningbo, China
• HS Code: 90282010
• Production Capacity: 500, 000/Year

Product Description

1- Application

NWM AMR/AMI water meter with Non-magnetic transmission technology that used for residential drinking water measurement application. The device use mechanical multi jet dry type water meter as the base meter, get the electronic pulse reading signal through mechanical and electrical conversion from the Non-magnetic counting, then transfer the data via NB-IOT /LoRa / LoRaWAN network to the smart metering system

Network topology structure



Non-magnetic water meters use eddy current effect.
According to Faraday's electromagnetic induction principle, when block-like metal conductor is in a changing magnetic field or is cutting magnetic field lines, the conductor will produce a spiral-like induction current.
Shown as figure 3: Inductance coil marked as number 1 and 2,metal plate marked as number 3 and 4
When No.3 and No.4 rotary, the distance between the metal plate to the eddy current sensor become change, which change the inductance coil Q value accordingly, finally lead to change of the oscillation voltage amplitude. This full series of changing from the different detective distance transform into the value voltage changes after the oscillation voltage detection, filtering, linear compensation, amplification normalization process, , and then generate pulse counting signal number 5 and 6 by the single chip process.  As shown in figure, there are 4 positions: 00.01.11.10 turn to 00.01.11.10 and reverse to 10.11.01.00 which enable the water meter to identify the flow direction during using.
 

3- Features

Performance	Parameter
Working voltage	3.6V
Working power supply	Battery+super cap
Data storage	Data is stored for 10 years without loss, 24 hours daily data of cumulative positive flow and counter flow, maximum daily instantaneous flow: 5minutes/cycle
Data collecting way	Non-magnetic Transmission
Communication mode	NB-IOT
Standby current	<    40uA
Electromagnetic environment	E1
Medium temperature	Cold water meter: 0.1~30ºC;
Water pressure	≤ 1 M Pa;
Protection level	IP68
Storage environment	Environment temperature:0.1~30ºC; Relative humidity ≤90%
Installation environment	B class, prohibit the strong magnetic environment
Temperature class	0.1~30ºC
Pressure loss	≤0.063MPa