- Level control for open tanks or without pressure.

The liquid, as it rises in the open tube at the bottom, increases the pressure of the trapped atmosphere. The pressure variation acts on a diaphragm that directly activates a contact. The level controller SNR 4, affords a dirt liquid as far as this one does not clog the measuring tube. Threshold is adjustable.

NOTE: The inner atmosphere can diffuse through the diaphragm; It is necessary to renew the atmosphere (fresh air) every three months.