Found in old documentation, this circuit has only the most difficult component to obtain the PUT. The sensors are electrodes placed in the reservoir. The circuit directly controls an AC power load.
This circuit produces a signal in the range corresponding the the VHH channels between 2 and 6....
The circuit presented is from a 1969 Radiorama magazine (Italy), and can be designed with more...
The maximum power of the controlled load depends on the triac used. The circuit is from a Radio...