CSF33 series modular probe designed to satisfy the multiple level control requests typically used in DIESEL CASES, CLEAN WATER BOXES, GRAY WATER BOXES and BLACK WATER BOXES. The choice of this probe makes the manufacturer free to store a single product that in a short time can be customized based on the size and shape of the tanks used in the boat line through a simple programming software. Construction in AISI316, connection to the tank 6-hole flange 100 mm diameter.