SKE Ultrasonic Level Switch Sensor for Vessels Ship
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Power supply |
24VDC |
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Standby current |
4—5mA |
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Output current |
16±1mA |
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Sensitivity |
5mm |
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Delay |
0.5 seconds |
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Mounting |
3/4 NPT |
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Sensor material |
Titanium Alloy |
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Temperature |
-20℃ to 80℃ |
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Protection grade |
IP67 |
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Weight |
200g |
Working
principle
The ultrasonic switch is a device that uses an inaudible high-frequency acoustic wave
(ultrasonic wave) to detect the presence of liquid at a specified point. The
device is composed of electronic control unit and a sensor. The ultrasonic level
switch uses the characteristics of sound wave transmission in steam and liquid
to detect the liquid level. When sound waves travel through the air, they lose
a lot of signal strength. When propagating in a liquid, sound waves retain
almost all the signal strength.
To detect the level, we must determine whether there is liquid or gas (air) in the gap. Because liquids are denser than gases, it is easier to transmit sound waves through them. One side of the sensor gap transmits sound waves and the other side detects sound waves. When liquid is present, a large number of sound waves are received on the detection side. When gas (air) is present, a small amount of sound waves are received. The electronics detect this difference and switch the relay accordingly.
The ultrasonic switch sensor consists of two piezoelectric crystals, one for transmitting sound waves and the other for receiving sound waves. Each crystal is mounted on one side of the metal sensor gap. The transmitting crystal generates high-frequency sound waves (1MHz to 3MHz) that travel through the gap to the receiver crystal. The receiver crystal converts the received sound energy into an electrical signal, which is processed by electronic equipment to determine whether there is liquid or air in the gap.
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Shaanxi Shengke
Electronic Technology Co.,Ltd |
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p: |
+86
-29-88858601 m:+86
15809274235 |
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a: |
Room 1911,
Junminronghe Building,No25 Fazhan Road, Gaoxin Zone, Xi’an City,
Shaanxi.China |
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w: |
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