What to Look for in a Calibration Gas Generator (Buyer's Guide)
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If you're evaluating calibration gas generators for the first time — or replacing an aging cylinder-based setup — here's what actually matters in the decision.
Gas range and compatibility
Confirm the generator supports every gas your detector fleet requires. ACD's lineup covers ammonia, chlorine, chlorine dioxide, hydrogen, hydrogen cyanide, hydrogen sulfide, nitrogen dioxide, and ozone, and is compatible with detectors from major manufacturers including Crowcon, Teledyne, GDS, Honeywell, MSA, and RKI.
Flow control
Adjustable flow and concentration matter if you're calibrating a range of sensor types or sensitivities. Fixed-flow systems are simpler but less flexible; variable-flow systems (like the GENie O3 variable flow model) handle a wider range of calibration scenarios.
Portability
If your team calibrates in the field rather than at a bench, weight and case design matter. On-demand generators are built to be carried without the added weight and hazard classification of a pressurized cylinder.
Total cost of ownership
Look past the sticker price of the calibrator itself — the real cost driver over time is the price per hour of the gas source, since that's the recurring purchase. This is where on-demand generation shows its biggest advantage over cylinder-based systems.
Support and documentation
Make sure manuals, safety data sheets, and support videos are readily available — you'll want them on hand for training new technicians and for audits.