NB IoT Smart Water Meter
LXSY-15W to LXSY-40W (15mm to 40mm) is a wireless remote reading NB water meter of low power consumption based on the wireless communication technology of narrowband cellular, with split design (the electronic parts are sealed separately and the water proof grade can be IP 68), with the multi jet wet type meter as the base meter.
Features:
The mechanical part of NB meter is multi jet wet type or dry type, with the high accuracy, low starting flow rate, easy reading, long lifetime, etc.
The meter body can be brass/iron/plastic.
Meeting EMC/ESD/EMI, the design requirements of electromagnetic compatibility for the electronic products, reaching the industrial leading level.
The wireless module is separated with the mechanical part, for easy maintainance.
The electronic parts are separately sealed, and the water proof grade can be IP 68.
Adopting the advanced technology of data coding and verification, with high communication reliability
NB water meter is communicating directly with NB-IOT base station, without collector and concentrator as the reading system.
Combined by the host computer, building a remote reading management system, to ensure an automatic reading and monitoring.
Water meter data cycle reporting: it can be set up accordingly to report the data hourly, daily, monthly, including the accumulated water volume, battery capacity, meter status as well as the reporting period.
Convenient mechanical reading: the reading would not be affected after assembling the NB wireless module.
Stable signal: with the NB-IOT base station, NB meters set up a network by the core network to make sure a stability of the signal.
No wiring, and easy installation.
Advantage of the Narrowband Cellular Technology of NB-IOT.
Low power consumption
Deep coverage of 20 dB and gain (more penetration of a wall than 2G).
Low cost, multilink (meter reports data directly to base station, without the help of the intermediate equipment.
Security (adopting cloud management platform to ensure the safety of the clients)
Reliability of internet (adopting the specific internet to ensure constant and stable operation.
Reusing the current cellular internet (fast and cheap).
Global standard cost and roaming.
Parameters of Electronics
| Item | Parameters |
| Frequency | 800MHz,900MHz |
| Communication Mode | Duplex, sending and receiving |
| Output Power | <23dBm |
| Receive Sensitivity | -136dBm |
| Emission Current | <250mA |
| Receive Current | <80mA |
| Sleep Current | ≤4uA |
| Visible Distance | >20Km |
| Communication Protocol | CoAP |
| Working Temperature of Module | -20ºC~+70ºC |
| Battery Mode and Capacity | ER26500;8500mAh |
| Battery Lifetime | Reporting Once Daily :about 6 years |
Automatic Network Topology of NB Water Meters.
Standard Compliance
Technical data conforms to ISO 4064 Class B, Class C, R80, R100, R125 or R160 standard for horizontal installation.
Working Condition:
Water temperature:≤50ºC for cold water meter; ≤90ºC for hot water meter
Humility: 0~95%RH
Working Pressure: ≤1.0 Mpa.
Pressure Loss: ≤0.063Mpa.
Environment Class: B (installed inside).
Electromagnetic class: E1 (residential, commercial and ligh indurical).
Water Proof Grade: IP 68.
Installation requirements
*The meter should be installed in horizontal position with the direction of the flow as indicated by the arrow cast in the meter body with the register face upwards.
*Pipeline must be flushed before installation.
*The meter should be constantly full of water during operation.
Maximum Permissible Error
In the lower zone from Qmin(Q1) inclusive up to but excluding Qt (Q2) is ±5%. In the upper zone from Qt(Q2) inclusive up to and including Qmax(Q4) is ±2%(cold water meter). In the upper zone from Qt(Q2) inclusive up to and including Qmax (Q4) is ±3% (hot water meter). 
Accessories
Each water meter has one set couplings optional: 2pcs tube, 2pcs nut and 2pcs gasket
MAIN TECHNICAL DATA According to ISO4064 :2003 (Old Standard)
| Size | Inch | Class | Qs | Qp | Qt | Qmin | Min reading | Max reading |
| Overload flow | Nominal flow | Transitional flow | Min flow | |||||
| DN(mm) | m³/h | L/h | m³ | |||||
| 15 | 1/2" | A | 3 | 1.5 | 150 | 60 | 0.00005 | 99999 |
| B | 120 | 30 | ||||||
| C | 22.5 | 15 | ||||||
| 20 | 3/4" | A | 5 | 2.5 | 250 | 100 | 0.00005 | 99999 |
| B | 200 | 50 | ||||||
| C | 37.5 | 25 | ||||||
| 25 | 1" | A | 7 | 3.5 | 350 | 140 | 0.00005 | 99999 |
| B | 280 | 70 | ||||||
| C | 52.5 | 35 | ||||||
| 32 | 11/4" | A | 12 | 6 | 600 | 240 | 0.00005 | 99999 |
| B | 480 | 120 | ||||||
| C | 90 | 60 | ||||||
| 40 | 11/2" | A | 20 | 10 | 1000 | 400 | 0.00005 | 99999 |
| B | 800 | 200 | ||||||
MAIN TECHNICAL DATA According to ISO4064:2014 (New Standard)
| DN | Mm | 15 | 20 | 25 | 32 | 40 |
| SIZE | Inch | 1/2" | 3/4" | 1" | 11/4" | 11/2" |
| Q4(m³/h) | 3.125 | 5 | 7.875 | 12.5 | 20 | |
| Q3(m³/h) | 2.5 | 4 | 6.3 | 10 | 16 | |
| R80 | Q2(L/h) | 50 | 80 | 126 | 200 | 320 |
| Q1(L/h) | 31.25 | 50 | 78.75 | 125 | 200 | |
| R100 | Q2(L/h) | 40 | 64 | 100.8 | 160 | 256 |
| Q1(L/h) | 25 | 40 | 63 | 100 | 160 | |
| R125 | Q2(L/h) | 32 | 51.2 | 80.64 | 128 | 204.8 |
| Q1(L/h) | 20 | 32 | 50.4 | 80 | 128 | |
| R160 | Q2(L/h) | 25 | 40 | 63 | 100 | 160 |
| Q1(L/h) | 15.62 | 25 | 39.37 | 62.5 | 100 | |
| Min reading(m³) | 0.00005 | 0.00005 | 0.00005 | 0.00005 | 0.00005 | |
| Max reading(m³) | 99999 | 99999 | 99999 | 99999 | 99999 | |
| Max pressure(MAP) | 16 | 16 | 16 | 16 | 16 | |
| Max loss(ΔP) | 63 | 63 | 63 | 63 | 63 | |
| Max temperature | T50 | T50 | T50 | T50 | T50 | |
Dimensions and Weight
| Size(DN) | Horizontal | Connecting Thread | ||
| Length L | Width B | Height H | ||
| mm | mm | D | ||
| 15 | 165 | 90 | 150 | G¾B |
| 20 | 195 | 90 | 152 | G1B |
| 25 | 225 | 104 | 175 | G1¼B |
| 32 | 230 | 104 | 175 | G1½B |
| 40 | 245 | 125 | 210 | G2B |
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