Cylindrical distance sensor Sonic Joker®

ultrasonic4-20 mAvoltage output

Sonic Joker 275 is a high resolution ultrasonic measurement device designed for precise distance measurement in quality control and continuous production. The Sonic Joker 275 is the follow-up model of the well established Sonic Joker 270. Almost any solid object or liquid level can be measured with high accuracy, despite of its color and surface structure. Due to the high intensity of the ultrasonic pulses, even highly sound absorbing materials like foams, textiles and insulation mats can be measured. A standard application is the thickness measurement of products made of foam, plastic, rubber, and stones in the production process. Fill levels of liquids, pastes and granulates can also be recorded. Process control is assisted by special I/O functions. A USB and serial interface and two analog and digital outputs are available for data transfer. Two sensor heads are connected to one controller unit for comprehensive survey and redundancy. Free hanging objects in continuous production are measured with an anti-parallel sensor alignment. The TFT display of the controller unit is continuously visualizing the measured distance or thickness values and relevant measurement parameters.

The ultrasonic distance measurement is carried out according to the pulse/echo method. The distance between the sensor head and the reflecting object is calculated from the traveling time of the sound pulses from the sensor to the object and their echoes. The knowledge of the sound propagation conditions, i.e. the velocity of sound, is essential for a high accuracy measurement. This is achieved by the smart sensor head FX 150 of Sonic Joker 275: A built-in reference bar gives continuous calibration signals and compensates for temperature changes and different air composition. The integrated ventilation fan homogenizes the air volume between the sensor head and the object, thus giving definite and unspoilt sound propagation conditions for high accuracy measurements. For operation in a dusty environment an air filter is available for the sensor heads. For mounting the sensors robust sensor holders are available.

The measurement data is transmitted continuously to a PC. The software SONIC TOOLS comprises subroutines for setting Sonic Joker 275 parameters and continuous production survey with limit control. Additionally, the measurement data can be saved and visualized graphically by the software.