Model abbreviation: HFT-DPL
Structure: split type;
Measurement types: velocity, flow, water depth, water temperature
product details
Selling Units: Single item
Single package size: ： 50*26.5*16.5cm
Single gross weight:3.00 KG
Ultrasonic Doppler Flowmeter
I. Introduction
Product Introduction
The product is a kind of sensor that measures flow velocity and flow rate in natural waters, channels or pipes.
The flowmeter is divided into two parts: sensor and host, connected by cable.
To be able to measure flow velocity and flow rate in channels and rivers, the water level has to be 20 cm higher than the sensor.
To be able to measure flow velocity and flow rate in pipeline and culvert, water level has to be more than 20 cm higher than the sensor, tubing inner diameter has to be ≥500 mm.
1.1 Operating Principle
The sensor is fitted with two energy converters, one for transmission, one for receiving. On the premise that the sensor is facing the water flow direction, i.e. countercurrent direction:
1.When water is static, the transmission and receiving frequencies are the same.
2.The faster the velocity is, the faster frequency the sensor receives signal, and it will be higher than transmission signal.
3.The slower the velocity is, the slower frequency the sensor receives signal, and it will be lower than transmission signal.
On the premise that the sensor is on the water flow direction, i.e. current direction:
1.When water is static, the transmission and receiving frequencies are the same.
2.The faster the velocity is, the faster frequency the sensor receives signal, but it will be lower than transmission signal.
3.The slower the velocity is, the slower frequency the sensor receives signal, but it will be lower than transmission signal.
Hardware and software can calculate water flow direction and velocity.
The sensor has to be installed facing the water flow direction
2 Technical Parameters
Initials for Field Irrigation Doppler flowmeter: HFT/FIDF
Model no. for river channel flowmeter: HFT/GRCF
Non-full pipe flowmeter model: HFT/DTF
Structure: split type;
Measurement categories: velocity, flow, water depth, water temperature
Level of protection: IP68
Purpose: on-line measurement
Velocity measuring range: the standard is 0.04 m/s ~ 5.00 m/s (the sensor is 20 cm above minimum depth) ;Other velocity range can be customized.
The velocity measurement resolution: 1 mm/s;
Velocity measurement precision: ±2～4% of measuring velocity;
Water depth measurements: 0.02 m ~ 10.00 m; Resolution: 2 mm accuracy: ±0.5%;
Temperature range: 0～60ºC; resolution: 0.1ºC;
Flow range: 10 L/s ~ 99999999 cubic meters/hour
Power supply: battery, 12 VDC;
Output signal (battery): RS485;
RS485 output signal content: flow velocity, instantaneous flow, cumulative flow, water level and temperature；
Output signal (external power supply) : 4-20 mA;
4-20 ma output signal content: instantaneous flow rate；
Cable length between sensor and transmitter: 10 m;
Types of channels subjected to measurement: pipeline, channels, natural stream and rivers;
PH value requirement: PH between 6 ~ 8, no corrosive effect on sensor.
Liquid temperature requirement: 0 ~ 50 ℃；
Liquid pressure requirement: natural environment condition, 1 standard atmospheric pressure；
Power supply for flowmeter is 11 ~ 14 VDC, power supply current is 250 mA.
Continuous working power consumption: 14V×200ma=14V×0.25A=3.50W。
Softwares:
Data acquisition system 1 set low power consumption GPRS wireless data acquisition and transmission software(optional)
Integral management system 1 set low power consumption GPRS wireless data acquisition server software(optional)
3、 Standard Measurement State
After powering up, flow velocity and flow rate will be provided after 30 s, then one set of data will be provided every 5~10s.
Under standard measuring status, signal 485 from sensor is directly connected with host. The host will output flow velocity and flow rate signals from 485 interface.
1.4 Displace interface (press up and down bottom to switch these two display interfaces)
Fig. 1: Water level, Instantaneous Flow Rate and Accumulative Amount
Fig. 2: Flow Rate, Flow Velocity, Cross-Sectional Area, Current and Water Temperature
Default start screen display: water level, instantaneous flow and accumulative amount
◆Integrated type
◆Split type
Fig. 3 Sensor Diagram
Product application:
Mainly used in sewage plant, water plant, mine, water conservancy, power plant, chemical plant, steel plant
The monitoring of waterlogging and water, sewage quality, urban pipeline and rainfall station in the construction of smart city project; applicable to the monitoring of rainfall point of existing water conservancy projects, river water and rain monitoring, reservoir water and rain monitoring, flow station, irrigation area, open channel monitoring, etc.; automatic monitoring of water plant, on-line water quality monitoring and secondary water supply monitoring of smart water project; suitable for intelligent water project It is used for the monitoring of collapse and landslide points, debris flow and surface water level of geological disaster projects
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