The RDO^® Calibration Kit contains the following for performing a 2-point calibration on the RDO optical dissolved oxygen (DO) sensor:

• Battery-powered air pump
• Large bubbler cup with aquarium stone, tubing, check valve, and pinch valve for calibrating the oxygen saturation point
• 2 alkaline D-cell batteries
• Small calibration cup for calibrating 0% DO
• Sodium sulfite solution, 500 mL, for calibrating 0% DO