AquaProbe Lite BlueLink Package includes the BlueLink Device, AP-LITE Probe, Sleeve End Cap, One pre-fitted mounting nut, Getting started card for quick reference and a Pot of Silicone Grease, a 3 meter cable and various accessories all supplied in a Rugged Carry Case. The AP-LITE probe features optical sensor socket and rugged AquaConn connector, but to complete your system, you will need an Optical Electrode. ...