The Neptune Apex PM2 module lets your Apex monitor conductivity and salinity, and it alerts you when readings trend outside your target range. It adds a second temperature port that is coupled with the conductivity value for a more accurate salinity reading.
Monitors and controls conductivity, salinity and temperature
Extra temperature port
Six I/O switch inputs for ATO, feed buttons or other uses
Works with a conductivity probe
Install the module in your Apex system and calibrate the probe as the manufacturer directs.