Skip to Main Content

PORTACAL® Oxygen calibration gas also referred to as Zero Air calibration gas. Oxygen deficiency is the leading cause of confined space injuries and fatalities. As defined by OSHA, any area that contains less than 19.5% oxygen is O2 deficient. Normal atmospheres contain between 20.8 and 21% oxygen. Oxygen above the normal level of 21% increases the flammability range of combustible gases or material and causes them to burn violently.

Use PORTACAL® Oxygen calibration gas to be sure your gas detection instrumentation is functioning properly.

Gas Type: Non-Reactive

Cylinder Size Material
Pressure Contents Water Capacity Dimensions Weight Valve Inlet
17 Liter Steel 240 PSI .6 CU FT 1.0 Liters 10.75" x 2.9" 1 lb CGA 600 74 Series
34 Liter Steel 500 PSI 1.2 CU FT .9 Liters 10.75" x 2.9" 1 lb 8 oz CGA 600 74 Series
105 Liter Aluminum Alloy 1200 PSI 3.708 CU FT 1.29 Liters 12.8" x 3.2" 1 lb 6 oz 5/8"-18 UNF (C-10) 71 Series