Oxygen Calibration Gas — Industrial Grade

Calibrating an O₂ analyzer involves a two-point calibration: a zero calibration using a zero gas (typically nitrogen) and a span calibration using a certified oxygen calibration gas at a known concentration. The analyzer's output is adjusted to match the certified value of the span gas. Always follow the instrument manufacturer's procedure and use NIST traceable span gas for compliance.

You should use a NIST traceable oxygen calibration gas whose certified concentration falls within 10–90% of your analyzer's full-scale range — ideally near the expected measurement level. For most ambient air monitors, a blend close to 20.9% O₂ is common. SpecGas supplies gravimetrically blended O₂ span gases in disposable and refillable cylinders sized from 17 to 2000 liters.

SpecGas offers oxygen calibration gas in cylinders ranging from 17 to 2000 liters gas capacity. Options include disposable aluminum, disposable steel, refillable aluminum or steel, and nickel-plated cylinders. This range accommodates portable field instruments requiring small disposable cylinders as well as fixed analyzer systems with high-volume demands.

Yes. All oxygen calibration gas blends produced by SpecGas Inc. are NIST traceable, meaning concentrations are verified against national standards maintained by the National Institute of Standards and Technology. This ensures compliance with national and international measurement specifications required for regulated industries such as emissions monitoring, environmental testing, and laboratory accreditation.

Yes. SpecGas specializes in custom gas mixture blending to customer specifications. Whether you need a specific O₂ concentration, a multi-component blend, or an ultra-pure grade for semiconductor or laser applications, the in-house blending team can accommodate precise requirements. Rush service is available upon request for time-sensitive projects.

SpecGas applies a proprietary internal cylinder treatment process backed by the SpecGas Stability Guarantee, which extends shelf life and maintains mixture integrity over time. While stability varies by concentration and cylinder type, this treatment ensures that your oxygen calibration gas remains within certified tolerance for the duration of its intended service life.