Waltron Zero Oxygen Water, 4 pack of 200ml Bottles

Waltron's Zero Oxygen Water provides a convenient, alternative method of calibrating nearly any dissolved oxygen sensor. By activating at the point of use, Zero Oxygen Water insures a fresh reagent for the calibration of oxygen sensors at the zero point. This one-time use solution is easy for transport to the point of testing and disposal afterward.  Convenient 4-pack allows calibration of multiple instruments.