This cylinder supplies clean, hydrocarbon-free zero-grade air used to establish the baseline reading of gas sensors and to purge instruments between exposures. Free from contaminants that could bias measurements, it sets an accurate zero reference for combustible, toxic and oxygen sensors, forming an essential first step in any precise calibration procedure.
The Zero Air Cylinder provides the clean reference atmosphere that underpins accurate gas detector calibration. Composed of purified, hydrocarbon-free air blended to approximately twenty per cent oxygen in nitrogen, it is free from the trace contaminants found in ambient air that could otherwise offset a sensor's baseline. Applying zero air allows technicians to set a true zero point for combustible, toxic and oxygen sensors before introducing span gas, ensuring that subsequent concentration readings are measured from a reliable and repeatable starting reference.
Beyond zeroing, the cylinder is widely used to purge instruments and sample systems between exposures, clearing residual gas so that successive measurements are not influenced by carryover. This is particularly valuable in laboratories, analyser shelters and calibration workshops across the GCC and India where measurement precision is critical. Each cylinder is supplied with certification confirming its zero-grade purity and is compatible with fixed-flow and demand-flow regulators for controlled delivery. Dependable, contaminant-free and consistent, zero air is a foundational consumable that improves the accuracy of every calibration it supports and helps maintain the integrity of continuous gas monitoring systems.
| Cylinder material | Aluminium |
|---|---|
| Composition | Hydrocarbon-free zero-grade air |
| Oxygen content | Approximately 20.9 per cent |
| Balance gas | Nitrogen |
| Valve type | Standard or demand-flow valve |
| Certification | Zero-grade purity certificate |
| Regulator compatibility | Fixed-flow and demand-flow |
Specifications are indicative. Contact us for full technical data, datasheets and available variants.
Single span-gas cylinder for calibrating one sensor to a known concentration.
Steel or aluminium cylinder for stable gas mixtures such as methane, CO2 and oxygen.
Four-gas mixture for fast bump testing of multi-gas detectors in one step.
Factory-preset constant-flow regulator delivering a fixed 0.5 LPM for diffusion gas detectors.
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