The Levelstate Electronic Type Level Switch – NANO is an alternative to the Float Level Switch for steam / water applications, providing a significant improvement in reliability and safety, reduced installation and maintenance costs.

Applications include single point level detection for Steam / Water / Vacuum / no water, which is used in high security low-water cut-off for Boilers, the detection of water in turbine steam extraction lines, Deaerator, HP Heater, LP Heater, Steam extraction lines, Condenser hotwell, etc.

The discrimination between water and steam is based on the significant difference in resistivity between the two states over the saturation range. The sensing element is a probe with an insulated tip, inserted in a housing assembly (Fig. 1.1) or standpipe, which protrudes into the required sensing location. If a voltage is applied to the tip and it senses water, conduction occurs between the probe tip and the inside wall of the insert assembly. The level of conduction is electronically detected to initiate relay action.