ultrasonic level transmitter / for solids and liquids / for water / analog

The level transmitter consists of an ultrasound sensor which,
contact-free, determines the separations of media of different types
(fluids, transported goods, solids). The ultrasound sensor works on
the principle of end-to-end measurement. Emitted ultrasound
impulses are reflected at the surfaces, and return to the transducer
after a transit time. The transit time is proportional to the distance.
The sensors have a control input which makes it possible to
synchronise up to 12 sensors with one another, or also to switch off
the sensor. In normal operation, the control input (pin 2) is left
open.
To switch the sensor off, the control input is connected to 0 V. In
this case, the signal last existing at the analog output is frozen until
the sensor is released again.
In order to synchronise several sensors with one another, the
control inputs of all sensors are connected to one another. The
sensors' pulse packages are then emitted simultaneously. The
received ultrasound echo from each individual sensor is then
evaluated and presented at the analog output.