The nb-iot non-magnetic sensor direct reading remote water meter is based on wlrrs type sensor. The electronic part of wlrrs type sensor based on the principle of radio frequency emission and the semicircle reflector allow non-metallic materials, which can realize the mechanical and electrical separation. It is an intelligent water meter with high mechanical and electrical conversion accuracy, which can be used for cold water and can not be used for measuring sewage and corrosive liquid. The water meter cooperates with the operator It combines the electromechanical conversion signal with nb-iot network data transmission technology to realize wireless signal data transmission, real-time collection of residential water meter usage, centralized storage and unified management of data, reduces manual labor, greatly improves work efficiency, provides basis for management, statistics and analysis of energy usage of water department, and makes management more scientific , more efficient.
Product use
Each user table can be opened / closed through the management platform. It is used to measure the total amount of domestic tap water, hot water and direct drinking water, and has intelligent charging and management functions; it is an intelligent instrument with photoelectric direct reading and sensing reading, and can transmit data and switch valves through nb-iot Internet of things, which is suitable for small industrial water and domestic water metering.
Product characteristics
A it is installed and used like ordinary water meter, small in size, low in power consumption and strong in penetration. It can realize automatic meter reading when installed on water pipe.
B. the non-magnetic sensor direct reading technology is used to complete the electromechanical conversion of the water meter in a non-contact way. The accuracy of the conversion metering signal can reach 1 liter. The independent positive and negative pulse signal line outputs a positive or negative pulse in a rotation cycle. The sensor can accurately judge the positive and reverse.
C. the water meter end can store historical readings, provide freezing data function, and easily realize step water price data. Abnormal reset does not affect the pulse data; power failure does not save the data.
D structure is simple, it can realize electromechanical separation and is not sensitive to strong magnetic interference (10000 Gauss strong magnetic field has no effect).
E. the meter reading cycle and frequency can be set through infrared or Bluetooth.
F. the meter reading communication is powered by battery, with a battery life of 6-10 years (related to the meter reading cycle and frequency), and low voltage alarm.
G. different operators can use nb-iot communication modules to support different nb-iot networks.
H RTC automatic timing function, automatic timing time can be set according to calendar time.
I has the function of forced activation of external magnetic system. At the same time, set the limit of activation times of external magnetic system to prevent malicious activation. The activation times can be set and reset remotely.
J data supplementary transmission function, including real-time supplementary transmission and delayed supplementary transmission. The time and times of delayed supplementary transmission can be set.
K has the functions of temperature detection, signal strength detection, battery voltage detection, etc
L the cumulative metering data and sensor status after power on can be queried through COM signal line; the module working status can be judged by the module self check status.
If the M module is abnormal, it can be reset; if it still works abnormally after reset, it can be reported as abnormal and replaced in time.
Design standard
GB / t778-2007 measurement of water flow in closed pipeline full pipe drinking cold water meter and hot water meter
CJ / t224-2012 electronic remote water meter
CJ / t383-2011 electronic direct reading water meter
Jjg162-2009 verification regulation of cold water meter
Rated working conditions
Flow range: q1-q3
Ambient temperature: 5 ° c-55 ° C
Ambient humidity: (0 ~ 100)% RH
Water temperature: cold water T30 ° C hot water T90 ° C
Water pressure: ≤ 1.0MPa
Water quality: tap water, direct drinking water, domestic hot water
Working power supply: 2.4v-4.2v (tye: 3.6V)
Working frequency: B1, B3, b5b8, B20, B28
(see attached table 1 for details of band)
Product technical parameters
Nominal diameter（mm） 15 20 25 32 40 50 Overload discharge Q4(m3/h) 3.1 5.0 7.8 12.5 20 31.25 Common discharge Q3(m3/h) 2.5 4.0 6.3 10 16 25 R=Q3/Q1 80，100，125，160 Range ratio Q2/Q1=1.6 Q4/Q3=1.25 Pressure loss level △p≦0.063MPa Pressure grade MAP10 temperature grade T30/T90 Flow-rate characteristics Accord with GB/T 778.1～3-2007Standard，Accuracy level：Level 2 maximum permissible error High area（Q2≦Q≦Q4）by±2%,Low area（Q1≦Q≦Q2）by±5% Water meter type Electronic remote cooling water meter with electronic device Design standard CJT224-2012Electronic remote water meter communication interface NB-IOT communication mode UDP/CoAP way Network coverage NB lot has a gain of 20dB and a coverage area of 100 times larger than the existing network Operating Frequency B1,B3,B5,B8,B20,B28(See Appendix table I for detailed description of band） Quiescent current <30uA Emission current 230mA Receiving current 60mA operating ambient 5℃～45℃(cold water)、0～95%RH Working water temperature 0.1℃～40℃(cold water)、0.1～90℃（hot water） Operating voltage 2.4V～4.2V(Tye：3.6V) Valve control function Open / close valve control management can be carried out for each user table through the management platform
Technical parameters of electronic module
Uplink communication mode NB-IOT telecom NB-IOP unicom NB-IOP mobile Operating voltage DC3.6V DC3.6V DC3.6V Quiescent current ＜2mA ＜2mA ＜2mA Communication module BC95-B5 BC95-B8 BC95-B8/M5310 Electromechanical conversion mode Nonmagnetic sensing Nonmagnetic sensing Nonmagnetic sensing Electromechanical conversion accuracy ±1 litres ±1 litres ±1 litres Battery Service life ≥6 years ≥6 years ≥6 years
Flow parameters
|
Nominal diameter DN（mm） |
Overload discharge Q4（m³/h） |
Common discharge Q3（m³/h） |
Boundary flow Q2（m³/h） |
Minimum flow rate Q1（m³/h） |
Range ratio R（Q3/Q1） |
accuracy class |
temperature grade（℃） |
|
DN15 |
3.125 |
2.5 |
0.040 |
0.025 |
100 |
2级 |
T30 |
|
DN20 |
5.000 |
4 |
0.064 |
0.04 |
|||
|
DN25 |
7.875 |
6.3 |
0.1008 |
0.063 |
note：Range ratio R=80/100/125/160，For detailed technical parameters, please call。
A.The maximum allowable error is ± 5% in the low zone from including the minimum flow (Q1) to excluding the boundary flow
B.The maximum allowable difference is ± 2% (when the water temperature is ≤ 30 ° C, ± 2%, when the water temperature is > 30 ° C, ± 3%) in the high zone including the boundary flow (Q2) and the overload flow (Q4)
Appearance and installation dimension
|
Model |
caliber |
Long L |
Board B |
Height H |
connection thread |
|
|
mm |
mm |
mm |
mm |
d |
D |
|
|
LXSNBW-15 |
15 |
165 |
95 |
145 |
R3/2 |
G3/4 |
|
LXSNBW-20 |
20 |
195 |
95 |
145 |
R3/4 |
G1 |
|
LXSNBW-25 |
25 |
225 |
97 |
155 |
R1 |
G11/2 |
