EIT LiQlyzer Ultrasonic Flow Meter
Clamp-On (Transit) Ultrasonic Flow Meter
A tool known as an ultrasonic flow meter measures flow by observing how a fluid flow interacts with an ultrasonic beam (or ultrasonic pulse). It is a volumetric flow meter that requires the liquid stream to contain air bubbles or small particles. As a result, this kind of flow meter is perfect for uses that need low maintenance, low pressure drop, and chemical compatibility.
Working Principle
Through the fluid in the pipe, ultrasonic waves are transferred at an angle. Changes in the ultrasonic waves' transit times are used to determine flow. When moving against the flow of water, ultrasonic waves will move slowly; yet, when moving with the flow, they will move swiftly.
PROS
No pressure loss exists.
There is a type that can carry out detection from the piping's surface.
CONS
There needs to be a lengthy section of straight pipe.
Large amounts of solids in liquids will result inaccurate due to the refraction.
When there are several air bubbles, rough surface or liner, measurement is impossible.
EX: cement liner, FRP pipe ...etc
 Ultrasonic Flow Meter |
 Handheld Portable Ultrasonic Flow Meter |
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| Accuracy | 1% of reading at rates >0.2 mps | |
| Repeatability | 0.2% | |
| Velocity | 32m/s | |
| Pipe Size | DN15 - DN6000 | |
| Pipe Material | Carbon Steel ; Stainless Steel ; Cast Iron ; Copper ; PVC ; Aluminum ; etc. Liner is NOT allowed | |
| Straight Pipe Section | Upstram: 10D; Downsteam:5D; From the pump:30D (D means outer diameter) | |
| Liquid Types | Water ; Sea Water ; Industrial Sewage ; Acid & Alkali Liquid ; Alcohol ; Beer & all kinds of oils which can transmit ultrasonic single uniform liquid | |
| Liquid Temperature | Standard: -30°C - 90°C ; High-temperature: -30°C - 160°C | |
| Liquid Turbidity | Less than 10000ppm, with a little bubble | |
| Flow Direction | Bi-directional measuring, net flow/heat measuring | |
| Ambient Temperature | -30°C - 80°C | |
| Relative Humidity | 85% | |
| Cable | Twisted Pair Line, standard length of 5m, can be extended to 500m (not recommended); Contact the manufacturer for longer cable requirement. RS-485 interface, transmission distance up to 1000m | |
| Ultrasonic Flow Meter | Handheld Ultrasonic Flow Meter | |
| Display | LCD with backlight, display accumulated flow/heat, instantaneous flow/heat, velocity, time etc. | 4×16 English letters |
| Power Supply | AC220V ; DC24V | 3 AAA Ni-H built-in batteries. When fully recharged it will last over 10 hours of operation.100V-240VAC for the charger |
| Output Signal | 4-20mA ; pulse ; 1 Relay | - |
| Protection Grade | IP65 ; IP68(Optional) | - |
| Ambient Temperature | 5°C - 60°C | 5°C - 60°C |
| Others | Automatically record the positive,negative,net totalizer flow rate and heat. Automatically record the time of power-on/off and flow rate of the last 30 times.Replenish by hand or read the datas through Modbus communication protocol. | Built-in data logger can store over 2000 lines of data |