Guide to ultrasonic level transmitter

A human can hear the sound of a maximum 20 kHz frequency. Ultrasonic is the sound that is above the human hearing range, with the frequencies of above 20 kHz. And the normal frequency range that is used for ultrasonic level measurements is 40-200 kHz. Few animals such as the bats and frogs use the ultrasonic sound to communicate with each other. Bat use the sound for navigation by emitting the high pitch sound of short wavelength to check the distance of the object on their way by listening to…

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