EUROSWITCH

RESISTIVE LEVEL SENSORS

Resistive level sensors are designed to provide an electrical signal proportional to the liquid level inside a tank. Thanks to their high reliability, excellent signal linearity and the possibility of customizing the electrical output characteristics, they are widely used in industrial, automotive, agricultural, power generation and material handling applications. The reed switch technology also ensures a long service life and eliminates mechanical wear caused by sliding contacts, providing consistent performance over time even in the most demanding operating conditions.

The operating principle is based on a chain of reed switches and resistors integrated inside the sensor stem. A float equipped with a permanent magnet progressively actuates the reed switches along its travel, changing the output resistance value according to its position.

This configuration provides an almost continuous electrical signal proportional to the liquid level, which can be easily processed by analog gauges, electronic control units and monitoring systems.

The high modularity of this technology allows the measurement resolution, resistance curves and resistance values to be customized according to specific application requirements. Furthermore, the complete isolation of the electrical components from the fluid ensures compatibility with both conductive and non-conductive liquids, significantly extending the sensor's range of applications.