- Control of Min./Max. level of electrically conductive liquids
- Monitoring of a level point (overflow/dry run alarm) with double electrode.
- Fill or drain automated operation
- Level limit controller for water, waste water, acids, alkalis
- Level regulation (filling/draining) between 2 thresholds (3 rods)

The ES2001 resistive level controller principle use the electrical conductivity of the liquids properties; The liquid provides an electrical bridge between the immersed electrodes.

Operating limits
Resistive level controls are not suitable for liquids that contain oil or grease or when electrically insulating deposits can occur on the electrodes.

Detection limits
ES2001 controller can be used with liquids whose resistance between the electrodes is less than 150 kΩ (consider also the resistance from cable length).