Lorawan Wireless Communication Water Flow Meter for Wireless Remote
Reading ( with/without valve )
LoRaWAN IoT water meter is composed of water meter base meter,
electric ball valve (valve control),
magnetoresistive sensor, MCU, wireless communication module,
control circuit and other components.
Mechanical and electrical separation structure design. High
capacity lithium sub battery pack is used
for power supply. It provides long-term stable energy guarantee for
data acquisition, valve control and
wireless data transmission. LoRaWAN wireless communication module
is adopted. Through the spread
spectrum communication technology, the user water data is actively
uploaded (once a day by default) to
the LoRa WAN gateway. The gateway will upload to the system data
service center through LTE 4G network
or Ethernet. The system has the advantages of long communication
distance, large capacity, fast and
convenient installation, long service life, etc.
This water meter is of dry structure. The dry water meter is
isolated from the measured water due to its
counting mechanism. Therefore, it is not affected by the suspended
impurities in the water to ensure the
normal operation of the counting mechanism and the clear reading.
At the same time, it will not, like the wet
water meter, affect the reading of the water meter due to the fog
or condensation under the glass caused
by the temperature difference between inside and outside the meter.
1. Split structure: The electronic unit is independent from the
base table.
2. Accurate measurement: non-contact full-electronic detection
logic is adopted. The metering accuracy is 10
liters.
3. It has the functions of touching the key to wake it up and long
press key to go online and transmit data
remotely.
4. It has infrared communication interface. Relevant parameters can
be read and set.
5. It has alarm functions: Abnormal state battery voltage and
valve, continuous small and large flow, metering
module failure,etc.
6. Timed collection and upload function:Collect data timed. Auto
upload data at the set time point (once a day by
default). Meanwhile, it can receive and execute instructions from
the platform.
7. Auto switching of reporting mode: When the on-site signal is
abnormal, it will auto switch to monthly mode.
While it's recovered, it will auto resume the daily mode.
8. LP design: 3.6V lithium sub-battery pack (ER26500+HPC1520) is
adopted. Sleep current is less than 10uA.
9. Clock calibration function: Auto time calibration and platform
remote time calibration after the water meter is
online.
- Specifications & technical parameters
| Flow characteristics | Comply with GB/T 778.1~3-2007 standard. Accuracy Class: Class 2 |
| Nominal caliber (mm) | 15 | 20 | 25 |
| Overload flow Q4(m3 /h) | 3.1 | 5.0 | 7.8 |
| Commonly used flow Q3(m3 /h) | 2.5 | 4.0 | 6.3 |
| Maximum allowable error | high area (Q2≤Q≤Q4) is ± 2%, the low area (Q1≤Q<Q2) is ± 5% |
| R=Q3/Q1 | 100 (Dry Type) | | Quiescent current | <10uA |
| Range ratio | Q2/Q1=1.6 Q4/Q3=1.25 | Communication current
| Data collection and generating currents <50mA, and peak current <100mA |
| Pressure loss level | △ p≤0.063MPa |
| Maximum allowable water pressure | ≤1.2MPa | Operating environment | 0~ +45℃ (cold water),0~95%RH 0~ +90℃ (hot water),0~95%RH |
| Temperature grade | Cold:T30 Hot:T90 |
| Communication mode | LoRaWAN | Oprating voltage | 2.7 ～ 3.6 V |
1. Water meters should be checked frequently to prevent water meter
leakage accidents;
2. In winter, it is necessary to prevent the water meter from
freezing and bursting. Installing insulation measures
to the water meter when necessary;
3. When the home is not occupied for a long time, should close the
valve in front of the table to prevent water
leakage accidents;
4. Water meter is a measuring product and shall not be destroyed.
Destroying water meter is an illegal action.
- Transportation And Storage
Water meters must be transported and stored under the original
packaging conditions. Products shall not be severely impacted
during transportation and unpacking, and are transported and stored
in accordance with GB / T15464-1995 General Technical Conditions
for Instrument Packaging. The products shall be stored in the
warehouse and placed on the platform frame. The stacking height
shall not exceed five layers. No corrosive gases shall be present
in the stored environment.
