Why does the Ecolet 25a and 65a have two tubes?

There are two indicator tubes on the front of the system

Liquid indicator

The right-hand side (RHS) indicator tube is connected to the collection drawer, serving a crucial role in monitoring the fluid levels within the drawer. This connection allows for real-time visibility of the contents, ensuring that operators can easily assess when the drawer needs to be emptied or serviced

Overflow indicator

The left-hand side (LHS) indicator tube functions as the overflow cue, positioned externally to the collection drawer. This design ensures that any excess fluid that surpasses the maximum capacity of the drawer is safely visible, indicating that the front panel should not be opened until this liquid has evaporated.