RS485 4-20mA Liquid Water Flowmeter Wall-mounted Non-contact Ultrasonic Flowmeter

Handheld ultrasonic flowmeters measure liquid flow with an external clip-on sensor. The installation process is extremely simple, and the all-Chinese man-machine interface makes it easier to operate. Especially suitable for flow balance test and flow monitoring: drinking water, river water, sea water, cooling water, hot water, industrial sewage, lubricating oil, diesel oil, fuel oil, chemical liquids, etc.

Time difference measurement principle: After a probe transmits a signal through the tube wall, the medium, the other side of the tube wall, it is received by another probe, at the same time, the second probe also transmits a signal by the first probe, due to the influence of the medium flow rate, there is a time difference between the two Δt, according to the calculation can be obtained between the flow rate V and the time difference Δt conversion relationship V=(C2/2L)×Δt, Then the flow value Q can be obtained.

Measurement principle: time difference related principle Flow rate: 0.01~25 m/s Resolution: 0.025 cm/s Repeatability: 0.15% reading, depending on the application Accuracy :(flow field fully developed and radially symmetric) Volume flow rate: ± 1% reading, depending on the application ± 0.5% reading, calibrated flow rate: ± 0.5% reading, depending on application Measurable media: all sound conducting fluids with a volume content of bubbles or solid particles <10%.

Industrial flow measurement generally has the problem of large pipe diameter, large flow measurement difficulties, this is because generally with the increase of the diameter of the measurement pipe will bring difficulties in manufacturing and transportation, cost increase, energy loss increase these shortcomings, ultrasonic flowmeter can be avoided. Because all kinds of ultrasonic flow meters can be installed outside the pipe, non-contact flow measurement, the cost of the instrument is basically unrelated to the size of the measured pipe diameter, and other types of diameter increases, the cost increases significantly, so the larger the diameter than other types of flowmeters with the same function, the more superior the functional price ratio, is considered to be a better large pipe runoff measuring instrument.

FAQ:

1、Ultrasonic flowmeter has no signal

The cause of the problem: the middle connection between the ultrasonic transducer and the host is broken

Solution: Connect again

2、the signal strength is insufficient

(1) The cause of the problem: the existing host power supply is damaged

Solution: Clean power supply

(2) The cause of the problem: the ultrasonic transducer is moved

Solution: Adjust the ultrasonic transducer part again

3、the instantaneous total flow is stable, but larger than the specific value

The cause of the problem: There is a problem with the acoustic wedge of the ultrasonic transducer

Solution: Disassemble the ultrasonic transducer

4、instantaneous total flow fluctuation

(1) Problem analysis: The fluid is affected and the flow is unstable

Solution: Disassemble the ultrasonic transducer part

(2) Problem analysis: host damping ratio setting size

Solution: Increase the damping ratio

5、instantaneous and total total flow is inconsistent

Problem analysis: The host has a problem

Solution: Replace the host