The VWO-003, a medium pressure ORP Water Quality sensor from Verge Solutions is chosen for:
It has Modbus output and a voltage range of 9-24V, a current draw is 10mA and has a wake time of 3 seconds. Its measurement range is -2000 to +2000mV and it is used by water, aquaculture, horticulture, and some of the applications are monitoring the chemical activity of water.