20.9% Oxygen (Zero Air) Calibration Gas
Precision trademarked PORTACAL® brand calibration gas. Same day shipping available. | From simple mixtures such as ultra high purity nitrogen to highly reactive gas mixtures as well as complex four gas mixtures, use PORTACAL® single calibration gas mixtures for calibration and certification of portable equipment as well as single and multi-point systems for industrial and health & safety applications. Any other purposes are in violation of state and federal laws. Not for personal use.
Free and easy way to return empty cylinders (17 and 34 liter steel cylinders not included) - Click Here for Shipping Label