DO probes:
4 x Hamilton VisiFerm RS485-ECS 225 H3
pH probes:
4 x Hamilton EasyFerm Plus PHI Arc 225
https://www.hamiltoncompany.com/sensors/ph-sensors/easyferm-plus/easyferm-plus-arc
RedOx probes:
4 x Easyferm Plus ORP Arc 225
DO probes:
4 x Hamilton VisiFerm RS485-ECS 225 H3
pH probes:
4 x Hamilton EasyFerm Plus PHI Arc 225
https://www.hamiltoncompany.com/sensors/ph-sensors/easyferm-plus/easyferm-plus-arc
RedOx probes:
4 x Easyferm Plus ORP Arc 225