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Ultrasonic level meter working principle and installation requirements
Ultrasonic level meter when working, high frequency pulse wave by a transducer ( probe ) issued, in the measured object surface ( surface ) is reflected back, echo is the same transducer ( probe ) receive, convert electrical signals. Pulse between transmitting and receiving time ( acoustic movement time ) and the transducer to the object surface is proportional to the distance, the acoustic transmission distance and velocity of S C and the transmission time of the relationship between T can use the formula: S=C x T/2
Ultrasonic level gauge installation must be considered in ultrasonic liquid level meter in the blind zone. When the liquid level in the blind area, ultrasonic transducer to measure liquid level, so in the determination of ultrasonic level meter range, must set aside 50 cm margin, when installed, transmitter probe must be higher than the highest level of about 50 cm. In order to ensure the accuracy of liquid level monitoring and ensure the safety of ultrasonic liquid level meter.
In practical use, because the installation of the ill-considered, liquid level meter was flooded, resulting in complete damage of liquid level meter.
SF-P type ultrasonic liquid level meter characteristic
Low price, small volume, light weight, and can be used in food, chemical industry, semiconductor and other industries on the liquid and solid bulk non-contact type material level measurement, and can be used for long-distance monitoring and control of pump
Mechanical installation should pay attention to: the installation should be perpendicular to the test surface, avoid for measuring foam properties of objects, avoid installation at a distance from the surface of the measured object distance is less than the zone distance ( blind spot: each product will have a standard, with the product that ), should be considered to avoid the negative block material beam with pouring port and the container wall meet, detection of bulk solids should adjust the probe position, reduces the measuring error.
