Tuhorse Deluxe control box equipped a magnetic contactor. The coil in the contactor uses 24 volts supplied by the internal voltage transformer.
Some advantage of Deluxe control box is listed here:
1) The pressure switch, float switch or other pilot control switch will be connecting to low voltage of 24V as a control signal. 24 Volts is considered safety voltage.
2) Low amp control current going through the pressure switch. You no longer need to install a very thick gauge wire to the pressure switch. This reduces lot of chance having electric short in the conduit or the berried wires. Increase the liability and lifespan of the pressure switch.
3) The Deluxe control box uses a insolation transformer to separate the high voltage(230V) and the low voltage(24V) to increase safety.