The measured fluid of external clamp type ultrasonic flowmeter can be water, seawater or uniform liquid such as oil and slurry, conductive or non-conductive, corrosive or non corrosive liquid. The fixed external clamp type ultrasonic flowmeter is equipped with backlight LCD, which can display the instantaneous flow, positive, negative, net cumulative flow, flow rate, time, analog input and other data.it is suitable for steel, stainless steel, cast iron, cement pipe, copper, PVC, aluminum, FRP and other dense pipes.

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Brief Description Of External Clamp Type Ultrasonic Flowmeter

● The accuracy is high precision. Through the new sound velocity measurement method, it is also applicable to the fluid with unknown sound velocity, which is almost unaffected by the fluid temperature and pressure

● The external clamp type ultrasonic flowmeter adopts large planning integrated circuit CPLD,and surface pasting process, with higher accuracy.

● Excellent operability and convenience, Simple setting of LCD and function keys is adopted, LCD with backlight and fault diagnosis function

● high reliability, high performance, good applicability, 16 bits, 2 lines, with backlight.

● 1m database function,can record the flow and total flow in a period of time.

● 5 channels of 4-20mA current signals can be connected (such as temperature, pressure, liquid level, etc.)

● The external clamp type ultrasonic flowmeter has the function of power on and off management, which can record the time and flow of the first 64 times of power on and off, and can be compensated manually or automatically to reduce the flow loss.

● It can effectively overcome the attenuation of ultrasonic signal by the pipe wall and the scattering of ultrasonic signal by the rough inner surface of the pipe, so as to reduce the energy consumption of ultrasonic signal.

● It overcomes the influence of a small amount of sediment, suspended particles and bubbles on the signal, improves the accuracy of flow measurement, and is especially suitable for pipeline flow measurement.

● The external clamp type sensor of ultrasonic flowmeter shall be installed under pressure without water supply interruption, which will not affect normal production, and online replacement and maintenance shall be completed at any time.

Performance Characteristics

Measuring liquid: single and stable fluid such as water, acid-base liquid, alcohol, seawater and various oils, with turbidity less than 20000ppm and particle size less than 2mm

Pipe material: steel, cast iron, PVC pipe and other full pipes that can be penetrated by ultrasonic wave, with dense texture and no serious corrosion dirt, and a thin layer of dense lining is allowed

Pipe lining materials: rubber, epoxy asphalt, FRP, mortar, etc., or unlined

Pipe diameter range: the applicable pipe diameter of external clamp sensor is DN13mm ~ 8250mm

Velocity range: 0 ~ ± 68m/s, bidirectional flow velocity

Accuracy: better than ± 1.0%

Linearity: 0.5%

Length of straight pipe section: upstream > 10D, downstream > 5D, distance from pump outlet > 30d (D: pipe diameter)

Display mode: 2 * 20 character LCD , with LED backlight

Signal output: 4-20mA or 0-20mA, RS485 (optional RS232)

Ambient temperature / humidity: Host - 30 ℃ ~ + 80 ℃; Sensor - 40 ℃ ~ + 200 ℃, the sensor can work in water, and the water depth is less than 5m.

Power supply: AC220V, DC8 ~ 36V or AC7 ~ 30V

Installation: stainless steel strip installation, special coaxial double shielded cable, which can be extended to 200m, and the cable characteristic impedance is 50 Ω.

Selection of external clamp type ultrasonic flowmeter sensor

Technical Parameter	Standard Small Probe	Standard Medium Probe	Standard Large Probe
Applicable Pipe Diameter	DN13～DN100	DN50～DN1000	DN300～DN6000
Texture of material	Plastic alloy
Working Frequency	1MHz
Installation Method	V (N、W）method	V、Z method	Z method
Calibration	Complete machine pairing calibration
Magnetism	Yes
Applicable Temperature	-40-200℃
Protection Level	IP68（It can work in water, and the water depth is ≤ 5m）
Overall Dimension	45×30×30	60×45×45	80×70×55
Mass (g / pair)	75	250	650
Medium	Water, seawater, sewage, alcohol, various oils and other single, uniform and stable liquids that can conduct ultrasonic waves.
Medium Turbidity	≤ 20000ppm and small bubble content
Applicable Pipe	Carbon steel, stainless steel, cast iron, copper, PVC, aluminum, FRP and other uniform and dense pipes ，allowed to be lined.
Pipe Lining Material	Epoxy asphalt, rubber, mortar, polypropylene, polystyrene, bakelite, PTFE, etc
Signal Cable	For special shielded cables, a single one can be extended to 300m. When wiring, the cable should be added with metal sleeve to increase anti-interference. Pay attention to that the cable should not be parallel to the high-voltage cable, and try to avoid interference sources such as frequency converter.