When the ultrasonic beam propagates in the liquid, the flow of the liquid will cause a small change in the propagation time, and the change in the propagation time is proportional to the flow rate of the liquid. At zero flow, the time required for the two sensors to transmit and receive sound waves is exactly the same (the technology that can actually measure zero flow). When the liquid flows, the transmission time of the sound waves in the upstream direction is longer than the transmission time of the sound waves in the downstream direction.
1. High-precision measurement, linearity is better than 0.5%, repeatability accuracy is better than 0.2%, and measurement accuracy is better than ±1%
2. The probe has low power consumption, simple installation and easy positioning. It is widely used in rivers, water supply, factories, urban sewage pipelines and other related fields.
3. The measurement range is large, and different types of sensors can be used to measure the flow of pipes with diameters of DN15-DN6000mm.
4. Support Chinese or English menu. Different versions of flow meters can support Chinese or English menus, which is convenient and quick.
5. Strong reliability, low voltage, multi-pulse transmitter circuit measurement accuracy, service life and reliability are greatly improved.
6. Strong anti-interference ability, adopting double-balanced signal differential transmission and receiving circuit, effectively resisting strong interference sources such as inverters, TV towers, and high-voltage lines.
7. Powerful memory ability, automatically memorize the accumulated flow of the previous 64 days, 64 months, and 5 years, automatically memorize the time and flow of the previous 64 calls and power failures, and automatically memorize whether the flowmeter's working status is normal in the previous 64 days.
8. The built-in remote communication module can make various communication protocols. (METER-BUS protocol, MODBUS protocol, Fuji expansion protocol, simple water meter protocol)
9. RS232/RS485 output, 4-20MA pulse output.
1. Basic parameters
| project | Performance parameter |
| Precision | ±1% |
| Flow rate range | 0-±10m/s, forward and reverse measurement |
| Pipe diameter | DN15-DN6000 |
| Type of fluid | Water, sea water, sewage, acid and alkali, alcohol, beer, various oils, etc., a single uniform liquid that can conduct ultrasonic waves |
| Pipe material | Steel, stainless steel, cast iron, copper, PVC, aluminum, FRP, and other dense pipelines |
| Signal output | 1 channel 4-20mA current output, impedance 0-1K, accuracy 0.1% |
| 1 channel OTC pulse output, pulse width 6-1000ms | |
| 1 relay output | |
| signal input | 3 channels of 4-20mA current input, can be used as data collector |
| Connect three-wire PT100 platinum resistance to realize heat measurement | |
| Communication Interface | Isolated RS-485 serial interface, support MODBUS protocol |
| Power supply | DC8-36V or AC85-264V |
2. Working environment
host | sensor | |
Protection level | - | - |
humidity | ≤80%RH | |
temperature | -20-60℃ | -40-160℃ |
3. Household ultrasonic heat meter
| Hot (cold) carrier | Water/homogeneous liquid |
| level of accuracy | Level 2/3 |
| Turndown ratio | Qp/Qi=50 |
| Pressure loss | Less than 0.015Mpa |
| Nominal pressure | 1.6Mpa |
| Temperature Sensor | PT1000 platinum resistance in-line |
| Temperature measurement range | 1~105℃ |
| Temperature range | 3k-75K (heat meter)/2k-75k (cold meter) |
| Temperature resolution | 0.01℃ |
| Button method | Button/magnetic induction/self-jump |
| Environmental rating | Class A |
| Protection level | IP65 |
| Power supply type | 3.6V lithium battery with a service life of more than 6 years |
| communication method | Infrared (default) |
| RS485/M-BUS (default M-bus) | |
| 4-20mA | |
| RF radio frequency | |
| GPRS communication | |
| Protocol | Modbus/T188/Custom (default T188) |
| Installation location | Water supply/return water (default water supply) |
| Installation method | Horizontal or vertical |
4. Household ultrasonic water meter
Nominal diameter | Maximum flow rate | Common traffic | Minimum flow rate |
DN（mm） | Qs(m³/h) | Qp(m³/h) | Qi(m³/h) |
15 | 3 | 1.5 | 0.03 |
20 | 5 | 2.5 | 0.05 |
25 | 7 | 3.5 | 0.07 |
32 | 12 | 6 | 0.12 |
40 | 20 | 10 | 0.2 |
50 | 40 | 15 | 0.6 |
65 | 60 | 25 | 1 |
80 | 80 | 40 | 1.6 |
100 | 130 | 63 | 2.52 |
| Measuring medium | Water/homogeneous liquid |
| level of accuracy | Level 2/3 |
| Turndown ratio | Qp/Qi=50 |
| Pressure loss | Less than 0.015Mpa |
| Nominal pressure | 1.6Mpa |
| Button method | Button/magnetic induction/self-jump |
| Environmental rating | Class A |
| Protection level | IP65 |
| Power supply type | 3.6V lithium battery with a service life of more than 6 years |
| communication method | Infrared (default) |
| RS485/M-BUS (default M-bus) | |
| 4-20mA | |
| RF radio frequency | |
| GPRS communication | |
| Protocol | Modbus/T188/Custom (default T188) |
| Installation method | Horizontal or vertical |
