1.Introduction
1.1 Measuring principle
The ultrasonic Doppler flowmeter is a host that collects the flow velocity, water level and temperature of the ultrasonic Doppler flowmeter through RS485, and inputs various channel parameters according to the actual situation on site. The water flow area S (㎡) is calculated using the channel parameters and the collected water level H (m), and the instantaneous flow rate (Q=V*S) is calculated by multiplying the water flow area and the flow velocity V (m/s), and the cumulative flow rate is calculated by multiplying the flow rate by the cumulative time.
From this we can know:Q=V*S
Instantaneous flow rate * time difference = cumulative flow rate
1.2 Composition
KDF1000 series flow meter is a product that measures the velocity and flow of water in natural waters, channels, or pipelines.
The flow meter is divided into two parts: the sensor and the host, which are connected by a cable.
It can measure the speed and flow of water in channels and rivers, and the water level is more than 20 cm higher than the top of the sensor.
It can measure the speed and flow of water in pipes and culverts. The water level must be more than 20 cm higher than the top of the sensor, and the inner diameter of the pipe must be ≥ 500 mm.
2.Technical Specifications
| Power supply | Power supply range: 10.8VDC～26.4VDC; RS485 12V power consumption: 88mA±1mA (about 1.06W) RS485 24V power consumption: 52mA±1mA (about 1.25W) RS485+4～20mA 12V power consumption: 110 mA±1mA (about 1.32W) RS485+4～20mA 24V power consumption: 24V power supply without mA output |
| Output characteristics | RS485/ModBus standard protocol; 4~20mA (factory default without) |
| Measurement performance | Flow range: 1L/s~99999.99m3/h; Water depth range: 0.02~3m, 0.02~10m (please confirm the maximum water depth before ordering); Display interface 1: water level, instantaneous flow, cumulative flow; Display interface 2: water level, flow rate, cross-sectional area, temperature; Flow resolution: 0.0001L/s. |
| Physical properties | Split shell material: ABS, sensor material: POM; Sensor protection level: IP68; Transmitter protection level: IP65; Cable between sensor: 4-core shielded cable with air duct, factory default length 10 meters, wire diameter 8mm (other wire lengths need to be customized). |
| Working environment | Working temperature: 0～60℃ (non-freezing state); Storage temperature: -20～80℃; |
3.Dimensions
3.1 Product picture
Physical picture of the sensor (including all accessories)
Ultrasonic Doppler flowmeter (host) physical picture
3.2 structure size
4.Installation Instructions
4.1 Assembly diagram
There are four fixing plates in the factory accessories. Please see the figure. After fixing, it can be installed on the instrument box or wooden board.
| Ultrasonic Doppler flowmeter factory accessories list |
| NO. | Name | Model/Specification | amount |
| 1 | Ultrasonic Doppler flowmeter host | | 1 |
| 2 | Ultrasonic Doppler flowmeter sensor | | 1 |
| 3 | (Including sensor factory accessories) | | 1 |
| 4 | Mounting base plate | M6*16 | 4 |
| 5 | Flat head machine screws | | 2 |
| 6 | Clamps | | 4 |
| 7 | Mounting gaskets | M4*12 | 4 |
| 8 | Cross round head self-tapping screws | M4*25 | 4 |
4.2 Wiring
Ultrasonic Doppler flowmeter and host connection diagram
5.Application
