Carbon Monoxide (CO) remains one of the most widespread and treacherous toxic hazards in industrial safety. Known as the “silent killer,” this colourless, odourless, and tasteless gas can rapidly accumulate to lethal concentrations without immediate detection. Precise, regular calibration of your gas monitors is the single most critical line of defence against sensor drift, poisoning, and catastrophic failure. Our  carbon monoxide calibration cylinders provide reliable gas mixtures engineered to verify sensor response time, alarm setpoints, and measurement accuracy across your entire equipment fleet. Whether you are performing routine field maintenance or managing high-throughput safety hubs, our catalogue provides single-gas CO cylinders tailored to your operational workflow. Specialised single-gas CO mixtures are ideal for dedicated personal monitors like the GasBadge Pro, Tango TX1, and dual-sensor Tango TX2, as well as for verifying custom sensor configurations on multi-gas detectors. Ideal central workshops and automated DSX docking stations.