| Customization: | Available |
|---|---|
| Main Application: | Water |
| Type: | Ultrasonic Flow Meter |
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DN25 to DN2000 Wide Range Handheld Ultrasonic Flow Meter
Product profile
The ultrasonic flow meter has been upgraded based on the previous ultrasonic flowmeter which is still the main product line of the company. The new Version retains most of the excellent features and functions of the previous versions: the pulse measurement technology, the ultrasonic igniting and the small signal receiving circuits etc. The main improvements are made on the battery supply circuit and on the transmitting circuits. All other circuits are simply integrated into this new version without major modifications, due to the fact that we have already applied the most advanced measurement technologies and attained a more reliable model of ultrasonic flow meter.
Features
* Large-screen LCD * Non-contacting measuring
* Built-in data-logger * Built-in rechargeable battery
* High accuracy measuring * Wide measuring range
* Small and light * RS-232 serial interface
Principle of measurement
The Handheld Ultrasonic Flow Meter utilizes two transducers that function as both ultrasonic transmitters and receivers. The transducers are clamped on the outside of a closed pipe at a specific distance from each other. The transducers can be mounted in V-method where the sound transverses the pipe twice, or W-method where the sound transverses the pipe four times, or in Z-method where the transducers are mounted on opposite sides of the pipe and the sound crosses the pipe once.
This selection of the mounting method depends on pipe and liquid characteristics. The flow meter operates by alternately transmitting and receiving a frequency modulated burst of sound energy between the two transducers and measuring the transit time that it takes for sound to travel between the two transducers. The difference in the transit time measured is directly and exactly related to the velocity of the liquid in the pipe, show as follows:
Where
θ is the include angle to the flow direction
M is the travel times of the ultrasonic beam
D is the pipe diameter
Tup is the time for the beam from upstream transducer to the downstream one
Tdown is the time for the beam from downstream transducer to the upstream one
ΔT=Tup -Tdown
Specifications for DN25 to DN2000 Wide Range Handheld Ultrasonic Flow Meter
|
Linearity |
0.5% |
|
Repeatability |
0.2% |
|
Accuracy |
±1% of reading at rates>0.2 mps |
|
Response Time |
0-999 seconds, user-configurable |
|
Velocity |
±32 m/s |
|
Pipe Size |
15mm-6000mm |
|
Totalizer |
7-digit totals for net, positive and negative flow respectively |
|
Liquid Types |
Virtually all liquids |
|
Security |
Setup values Modification Lockout. Access code needs unlocking |
|
Display |
4x8 Chinese characters or 4x16 English letters |
|
Communication Interface |
RS-232, baud-rate: from 75 to 57600. Protocol made by the manufacturer and compatible with that of the FUJI ultrasonic flow meter. User protocols can be made on enquiry. |
|
Transducer Cord Length |
Standard 5m x 2, optional 10m x 2 |
|
Power Supply |
3 AAA built-in Ni-H batteries. When fully recharged it will last over 12 hours of operation. 100V-240VAC for the charger |
|
Data Logger |
Built-in data logger can store over 2000 lines of data |
|
Manual Totalizer |
7-digit press-key-to-go totalizer for calibration |
|
Housing Material |
ABS |
|
Case Size |
210x90x30mm |
|
Handset Weight |
500g with batteries |
Application:
Outstanding Features:
----the signal receiving circuits feature self-adapting performance so as to ensure that the user can easily operate the instrument without any adjustment.
----the built-in rechargeable Ni-H battery can work continuously for more than 12 hours without recharging.
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