A Comparison on application - Electromagnetic meters and Ultrasonic meters
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Update time : 2019-06-09 19:15:08
Electromagnetic flowmeters and ultrasonic flowmeters are popular for use in the water industry. Below is a comparison of these two meter types on applications to assist with decision-making.
Magmeter performance is not affected by temperature, pressure, or viscosity. These meters can handle rapid changes in flow. They can accurately measure clean fluids like drinking water or sewage. However, magmeters cannot measure non-conductive fluids like oils.
Transit-time ultrasonic meters can measure conductive and non-conductive fluids. These meters may have problems measuring fluids with suspended solids, debris, or air bubbles, which interrupt the path of the sound signal.
China-made Magnetic flow meter is the top item in the overseas market due to its perfect balance between quality and cost, the pipe-type ultrasonic flow meter is still an economical choice for water measurement. The main parameters for the pipe-type ultrasonic flow meter are listed below:
- Meter size: DN15 to DN1000
- Accuracy: 1.0%
- Temperature range: -30 to 160
- Body material: Carbon steel, Stainless 304, Stainless 316
- Signal output: 1 way 4-20mA output, 1 way OCT pulse output, 1-way Relay output
- Signal input: 3 way 4-20mA signal input
- Communication: RS485
- Power supply: 8-36VDC
- Protection: IP68
Regarding the accuracy, we have done related contrast test with High accuracy magnetic flow meter:
1), DN125, 20℃ working temperature, 0.4MPa working pressure, 0.2m/s flow velocity, please check the contrast result below:
2), DN125, 20℃ working temperature, 0.4MPa working pressure, 1.4m/s flow velocity, please check the contrast result below:
3), DN125, 20℃ working temperature, 0.4MPa working pressure, 3.6m/s flow velocity, please check the contrast result below:
The other special design for ultrasonic flow meter is that it can work underwater due to its whole IP68 protection.
Please check the conclusion below:
| Product Picture |  |
 |
| Accuracy | 0.5% | 1.0% |
| Meter size | DN6 to DN2000 | DN15 to DN1000 |
| Protection | IP65 | IP68 |
| Output | 1-way 4-20mA output 1-way pulse output |
1 way 4-20mA output 1 way OCT pulse output 1-way Relay output |
| Input | None | 3 way 4-20mA signal input |
| Communication | RS485, HART | RS485 |
| Measured parameters | Instantaneous flow Total flow |
Instantaneous flow Total flow Temperature Heat |
| Anti-corrosion | Have higher anti-corrosion because of the variety of choices of liner and electrode material |
Carbon steel, SS304, SS316 |
| Measured fluid | Conductive fluids | Conductive or Non-conductive fluids |
| Price | High | Low |
Please reach us at sales@mega-meter.com for any more information.