Probe Expansion Hardware (PX 1000)
The first expansion module, the PX 1000 (shown above) , with a pH, ORP, temperature (or 2 pH and 1 temperature), and 6 digital inputs is available now. To order click here. The PX 1000 features are:

• Monitor/Control pH, ORP, and tempprobe or 2 pH and temp probe.
  
•  6 digital inputs for float switches, water on floor sensors, pressure sensors, etc.
  
•  Full datalogging support in AquaController and AquaNotes. (1024 data points per measured parameter)
  
•  Up to 7 expansion modules can be used on the AC3 or AC3Pro.
  
•  Attaches to AquaController 3's I/O port with a 5' cable.
  
•  Additional Expansion modules daisy chain off the