SKU: SEN0496 - Gravity: Electrochemical Oxygen / O2 Sensor (0-100%Vol, I2C) Calibration

Hello,
Sorry for the stupid question.
I bought the Gravity: Electrochemical Oxygen / O2 Sensor (0-100%Vol, I2C) and I am trying to calibrate it.
I understand that for the 20.9% calibration you can use the normal environment.
I don't know where to place the probe in a pure oxygen environment for the 99.9% calibration.
Can you please advise me what I can use?
Thank you in advanced.
2025-05-05 16:25:36
ahsrab.rifat
You can purchase or rent a medical oxygen cylinder (often ~99.5% to 99.9% purity).
You must regulate the flow using a low-flow regulator (e.g., 0.5–1 L/min) to avoid damaging the sensor or causing turbulence.
Place the sensor in a small chamber or fit tubing over the sensor inlet and gently flow the oxygen around the sensor.
