Atlas Scientific Zero Dissolved Oxygen Calibration Solution is guaranteed not to have any oxygen in it.
This stuff is great for calibrating the low end of the Dissolved Oxygen scale or to confirm that your Dissolved Oxygen probe is working properly.
Specification: • 20ml each pouch
• 0 mg/mL Oxygen content
This product is used to confirm that Dissolved Oxygen Probe is working properly; it is used to calibrate the low end of the oxygen scale.