Which one is more suitable for you?

Ultrasonic water meter principle

A fully electronic water meter that adopts the principle of ultrasonic time difference. It is an electronic water meter that can further calculate the flow rate of water by detecting the time difference caused by the change of speed when the ultrasonic sound beam propagates in water upstream and downstream, and analyze and process the flow rate of water.

The structure of the ultrasonic water meter is mainly composed of transducers, measuring tubes, calculators and other parts.

Electromagnetic water meter principle

According to the principle of Faraday's electromagnetic induction, the electromotive force induced by the conductive fluid through an external magnetic field is an electronic water meter that measures the flow of the conductive fluid.　

The structure of the electromagnetic water meter is mainly composed of a magnetic circuit system, a measuring conduit, an electrode, a casing, a lining, and a converter.

01. Turndown ratio

Ultrasonic water meter: the range ratio can reach R800 or more, the accuracy can reach grade 1, the initial flow rate is low, the effective measurement range is large, and it can avoid dripping and leaking; the ability to track flow changes is weak.

Electromagnetic water meter: the range ratio can reach R800 or more, and the accuracy can reach grade 1; the response to flow changes is slow, and the measurement performance of medium and high flow rates is stable. The turndown ratio does not cover the small flow area.

02. Abrasiveness

Ultrasonic water meter: no mechanical moving parts, no wear and tear, accuracy has little to do with usage time.

Electromagnetic water meter: no mechanical moving parts, no wear and tear, accuracy has little to do with usage time.

03. Protection level

Ultrasonic water meter: meet the pressure loss level ΔP10.

Electromagnetic water meter: meet the pressure loss level ΔP10.

04. Protection level

Ultrasonic water meter: electronic product, the protection level is required to reach IP68.

Electromagnetic water meter: electronic product, the protection level is required to reach IP68.

05. Installation requirements

Ultrasonic water meter: better than U3D0: the upstream needs to be 3 times the length of the hole diameter of the pipe section, and the downstream can be directly connected to the elbow.

Electromagnetic water meter: U10D5 or U5D3: 10/5 times the aperture length of the pipe section in the upstream, and 5/3 times the aperture length of the pipe section in the downstream.

06. Installation method

Ultrasonic water meter: horizontal, vertical, inclined installation can be.

Electromagnetic water meter: horizontal or vertical, the electrodes must be on the same level.

07. Power supply battery life

Ultrasonic water meter: The battery life is 6-10 years under the current measurement cycle of at least 1S.

Electromagnetic water meter: The principle of electromagnetic induction determines that the power consumption is relatively large. Generally, it takes 15s to measure the flow once, and the battery life is 3-5 years.

08. Communication network

Ultrasonic water meter: comes with a communication interface, and the communication has zero error.

Electromagnetic water meter: comes with a communication interface, and the communication has zero error.

09. Environmental requirements

Ultrasonic water meter: The ultrasonic water meter calculates the flow rate by the time difference between the sending and receiving of the transducer. Once the transducer has air bubbles, it will affect the normal measurement.

Electromagnetic water meter: The amplitude of the electrode signal generated by the sensor in the electromagnetic water meter converter is weak, the signal is greatly affected by the change of the magnetic field, and the anti-electromagnetic interference performance is poor.