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PHW-28-G
Piezohannas
PHW-28-G
30KHz Horizonally-polarized Ultrasonic Flowmeter Transducer for Ultrasonic Flowmeter Sensor
1.Technical parameters：
Items | Technical Parameters | Image | |
Name | 28KHz horizonally-polarized non-directional cylindrical underwater acoustic transducer |
| |
Model | PHW-28-G | ||
Frequency | 28KHz±5% | ||
Detection Distance | 500m | ||
Minimum Parallel lmpedance | 300Ω±20％ | ||
21000pF±20％ @1KHz | |||
Sensitivity
| |||
-40～+80℃ | |||
≤3Kilos or 0.3MPa | |||
horizonally-polarized non-directional | |||
Housing Material
| POM | ||
Usage | ultrasonic flowmeter，submarine range finder | ||
| See the product structure drawing | ||
Protection Level | IP68 | ||
Weight | 340g±5％（Length: 2m） | ||
Wiring Instructions | Red+，White-，Black- ,shielded wire； （without temperature sensor by default） | ||
Admittance Curve | Product Structure Diagram | ||
|
| ||
2.Temperature Sensor Schematic Diagram of Transducer , Test Circuit Schematic Diagram
Ultrasonic Flow Meter Application:
An ultrasonic flow meter construction can be done by using upstream and downstream transducers, sensor pipe and reflector. The working principle of ultrasonic flow meter is, it uses sound waves to resolve the velocity of a liquid within a pipe. There are two conditions in the pipe like no flow and flowing. In the first condition, the frequencies of ultrasonic waves are transmitted into a pipe & its indications from the fluid are similar. In the second condition, the reflected wave’s frequency is dissimilar because of the Doppler Effect.
Whenever the liquid flows in the pipe quickly, then the frequency shift can be increased linearly. The transmitter processes the signals from the wave & its reflections determine the flow rate. Transit time meters transmit & receive ultrasonic waves in both the directions within the pipe. At no-flow condition, the time taken to flow in between upstream & downstream in between the transducers is the same.Under these two flowing conditions, the wave at upstream will flow with less speed than the downstream wave. As the liquid flows faster, the distinction between the up & downstream times raises. The times of the upstream & downstream processed by the transmitter to decide the flow rate.
30KHz Horizonally-polarized Ultrasonic Flowmeter Transducer for Ultrasonic Flowmeter Sensor
1.Technical parameters：
Items | Technical Parameters | Image | |
Name | 28KHz horizonally-polarized non-directional cylindrical underwater acoustic transducer |
| |
Model | PHW-28-G | ||
Frequency | 28KHz±5% | ||
Detection Distance | 500m | ||
Minimum Parallel lmpedance | 300Ω±20％ | ||
21000pF±20％ @1KHz | |||
Sensitivity
| |||
-40～+80℃ | |||
≤3Kilos or 0.3MPa | |||
horizonally-polarized non-directional | |||
Housing Material
| POM | ||
Usage | ultrasonic flowmeter，submarine range finder | ||
| See the product structure drawing | ||
Protection Level | IP68 | ||
Weight | 340g±5％（Length: 2m） | ||
Wiring Instructions | Red+，White-，Black- ,shielded wire； （without temperature sensor by default） | ||
Admittance Curve | Product Structure Diagram | ||
|
| ||
2.Temperature Sensor Schematic Diagram of Transducer , Test Circuit Schematic Diagram
Ultrasonic Flow Meter Application:
An ultrasonic flow meter construction can be done by using upstream and downstream transducers, sensor pipe and reflector. The working principle of ultrasonic flow meter is, it uses sound waves to resolve the velocity of a liquid within a pipe. There are two conditions in the pipe like no flow and flowing. In the first condition, the frequencies of ultrasonic waves are transmitted into a pipe & its indications from the fluid are similar. In the second condition, the reflected wave’s frequency is dissimilar because of the Doppler Effect.
Whenever the liquid flows in the pipe quickly, then the frequency shift can be increased linearly. The transmitter processes the signals from the wave & its reflections determine the flow rate. Transit time meters transmit & receive ultrasonic waves in both the directions within the pipe. At no-flow condition, the time taken to flow in between upstream & downstream in between the transducers is the same.Under these two flowing conditions, the wave at upstream will flow with less speed than the downstream wave. As the liquid flows faster, the distinction between the up & downstream times raises. The times of the upstream & downstream processed by the transmitter to decide the flow rate.
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