Reply To: Problems with OBS3+

There’s not a direct replacement for that sensor, meaning one with the same operating specs and output.  There are some alternatives, but most are significantly more expensive, or require different interface hardware (like the Yosemitech sensors), or Turner Cyclops sensors (but require user calibration).  Unless you need a turbidity sensor immediately, I’d recommend waiting just a little bit longer and there will be some good sensor options unveiled soon.