When it comes to water meters, we are certainly no strangers, because every family has. Water meters are mainly divided into two categories: mechanical water meters and electronic water meters. Mechanical water meters, commonly known as small meters, are mainly divided into three types: rotary-wing water meters, screw-wing water meters, and volumetric water meters, while electronic water meters, also known as large meters, are mainly divided into electromagnetic water meters, ultrasonic water meters, and jet water meters. With the continuous development of water meters, the flow sensing technology of electronic water meters is more excellent and advanced. Compared with the mechanical movement of the water meter, the electronic water meter has developed more rapidly in the current intelligent water meter. It has changed the problem of difficult to correct the error curve of mechanical water meters and solved the problem of wear and tear in long-term application. Today, we mainly talk about the electromagnetic water meter and ultrasonic water meter difference is what?

　　1, the water body regulations

　　Electromagnetic water meter: will not be subject to the material in the gravel weeds and other residues, compounds harm, but by the magnetic chemical substances;;

　　Ultrasonic water meter: no moving parts in the measuring tube, small pressure loss; wide measuring range, with a better ability to detect small flows; almost not affected by the material in the gravel weeds and other debris, compounds, with magnetic chemicals.

　　2、Range ratio

　　Electromagnetic water meter: low-flow rate measurement performance is poor, medium and high flow rate measurement performance is stable. The range ratio covers less than the small flow area.

　　Ultrasonic water meter: the range is generally better than 100:1, the starting flow rate is very low, can be less than 0.01m/s, the effective measurement range is large, can effectively prevent the phenomenon of running, bubbling, dripping, leaking.

　　3、Waterproof grade

　　Electromagnetic water meter: electronic products, the protection level of IP68 strictly higher requirements, must be qualified products can be achieved.

　　Ultrasonic water meter: electronic device products, waterproof grade strictly to IP68 higher requirements, must be qualified products can do.

　　4、Pressure loss

　　Ultrasonic water meter: to meet the pressure loss of Z small grade ΔP10

　　Electromagnetic water meter: ΔP10 to meet the Z-small level of pressure loss.

　　5、Wear and tear

　　Ultrasonic water meter: without any mechanical moving parts, never wear and tear, accuracy and use of time has little relationship, general measurement and verification cycle of more than 3 years.

　　Electromagnetic water meter: without any mechanical equipment theme moving parts, never damage, precision and use time has little to do with the general measurement and calibration cycle time more than 3 years.

　　6, installation method

　　Electromagnetic water meter: U10D5 or U5D3: upstream need 10/5 times the length of the pipe section aperture, downstream need 5/3 times the length of the pipe section aperture; Horizontal or vertical, the electrode must be in the same plane;

　　Ultrasonic water meter: industry-leading products can be better than U3D0: upstream need 3 times the length of the pipe section aperture, downstream can be directly connected to the bend, with the standard on the spot to choose the installation method of horizontal, vertical, skewed installation are available.

　　Electronic water meter comes with electrical signal output, overcoming the problem of metering data output conversion, in terms of intelligence relative to the mechanical water meter has an inherent advantage, can be more convenient to complete the data teleportation, prepayment and other functions. However, the electronic water meter has a high price, and also has the limitation of being easily disturbed by environmental conditions (vibration, electromagnetic environment, etc.).