GESTRA Level Switch – NRGS 15-1 (Level Electrode)

Function
The NRGS 15-1 level switch is a compact system consisting of a level electrode with four tips and an integrated level switch. The equipment only functions if used in water with a minimum electrical conductivity of > 0.25 ppm (0.5 µS/cm) at 77 °F (25 °C). In the level switch, a time-delayed switching channel, an output relay and a signal LED are assigned to each of the four electrode tips. The function of switching channels 1 and 4 is fixed, while switching channels 2 and 3 are defined via the code switch. The switchpoints of each switching channel depend on the level and are determined by shortening the relevant electrode tips.

The following functions are possible:

• Electrode rod 1 exposed / switching channel 1 energizes relay 1 = low water 1
• Electrode rod 2 exposed / switching channel 2 energizes relay 2 = low water 2
• Electrode rod 3 exposed or immersed / switching channel 3 energizes relay 3 (time-dependent) = timed pump control (fill/discharge control)
• Electrode rods 2 and 3 exposed or immersed / switching channel 3 energizes relay 3 = on/off pump control (fill/discharge control)
• Electrode rod 4 immersed / switching channel 4 energizes relay 4 = high water