The Aqua TROLL 400 Storage and Calibration Cup is a rugged alternative to the standard calibration cup. Made of polycarbonate, this cup screws directly on the end of the Aqua TROLL 400 probe for fast, easy calibrations.

The calibration procedure for this cup is similar to the procedure for the standard calibration cup, with a slight variation in how you prepare the cup for calibration.

Includes:

• Polycarbonate calibration cup
• Sponge wafers for 100% DO calibration
• Instruction sheet