What is the blind spot of ultrasonic level gauge?
Ultrasonic level gauges cannot simultaneously detect reflected echoes when emitting ultrasonic pulses. Due to the time width of the emitted ultrasonic pulses and the residual vibration of the sensor after the ultrasonic waves are emitted, the reflected echoes cannot be detected during this period. Therefore, a small distance from the surface of the probe downwards cannot be detected normally, which is called a blind zone. If the highest object level being measured enters a blind zone, the instrument will not be able to detect it correctly, resulting in errors. If necessary, the level gauge can be installed higher.