NOYITO Liquid Water Level Detection Sensor Module Suitable for Controller Switch Automation Detection Pump Tank Water Level

Can the signal be reversed, so that it turns on when the water level is high?

Does any power run though the "switch" terminals. I'm getting nothing. I was trying to trigger a solonoid. Is there any polarity to the terminals?

Will this work with reverse osmosis water which is less conductive that ordinary water from the tap?

Does it work with float switches?