Neptune Systems AquaController Apex System w/ pH ProbeIntroducing the AquaController Apex. The professional equipment your reef deserves is now within reach.System Includes: 1 - Apex Base Unit1 - Apex Display 1 - EnergyBar 8 Power Strip 1 - Temperature Probe1 - Standard Grade pH ProbeCONNECTIVITY Ethernet Interface Embedded Web Server Only controller with web browser Monitoring, Control Configuration. Email Alarms EXPANDABILITY Most expandable Controller (Up to 240 modules, hundreds of probes, and thousands of controlled outlets). Simple menu driven Configuration: No program language knowledge required. ROBUST TIMERS Simulates sunrise/sunset Simulates moon cycle Wave Maker and Random timed cycles Built-in Variable speed pump control Still water feed mode (multiple modes)ULTIMATE CONTROL Monitor/Control Temperature, pH, and ORP Digital Calibration on all probes Seasonal temp lighting control Flexible Control OptionspH Probe Precision of +/- .01 10` coax cable Sealed Ag/AgCI reference. Standard BNC connector**Please Note: pH Calibration Fluid sold separately