Automatic burettes are used for series of tests. It is connected with a bottle, which contains the titration solution. The air is pumped into the bottle by a small rubber air pump, created the pressure in the bottle which the rises the solution to the top of burette. When the burette is full, the valve is released; the pressure in the bottle falls and the burette automatically sets itself to zero. Work with automatic burettes is by far faster and the consumption of standard solution is smaller. Automatic titrators are known as differential titrators. These instruments add titrant at a constant rate and electronically take the derivative of the potential versus time curve that is produced.
Automatic Capacitor Banks includes blocking reactor, which is intended for power factor correction in systems where harmonic distortion is present. Each step of the bank consists of a capacitor unit with a blocking reactor. These banks are used for central power factor correction at main and group distribution boards. Automatic capacitor banks consist of stages controlled by a power factor controller, which ensures that the required capacitor power is always connected to the system.