Liquid Level Integration

My buddy owns a water store. He has asked me to help him automate his processes.

Please provide your suggestions how to integrate these water level sensors into Hubitat.

While I have not used it, the MonaLisa board might be a good fit. 4 analog-to-digital inputs (0V to 3.3V), so the voltage outputs would probably only need a simple resistor divider. The form factor is meant to fit a common Arduino shield, but I understand that it can operate as a standalone Zigbee device also.