The first expansion module, the PM1, with a pH or ORP, temperature, and 6 digital inputs.
4 in 1 goodness with this module!
The PM1 probe module is just what you need if you want to monitor pH or ORP in your tank. And, the...
The Advanced Leak Detection module easily connects to any Neptune Apex System (Apex, Lite, or Jr.) and gives you up to four locations of leak detection.
Two different types of leak detection probes are available (sold separate...
The PM2 probe module, includes support for conductivity (salinity), temperature, and 6 digital inputs. The PM2 features are:
Monitor/Control Conductivity and temperature.
6 digital inputs for float switches, water on floo...
The RKM-SL2 is the newest System Lab module from Digital Aquatics. It's a big leap forward with fully (and individually,) isolated ph and salinity ports. On top of that, the Digital Aquatics salinity probe is equipped with full di...
The SLXs five input ports provide a broad range of monitoring options for all the most common probes.
1 x pH port
The pH port is a standard BNC connection. While any standard probe should work, we suggest using Digital Aquati...