Electrolyte level indicator Smart Blinky on battery

Electrolyte level indicator Smart Blinky on battery. The level indicator is programmed to confirm that the electrolyte level is truly below the probe tip before it changes color from Green to Red. The probe must be out of the electrolyte for 24 hours before the color changes from Green to Red. This eliminates false indication, maximizes watering intervals to prevent unnecessary watering and minimizes costly boilovers.