CalGaz standard 4-gas calibration gas mix is a trusted calibration and bump test gas for portable multi-gas detectors. It contains methane at 2.2% by volume, oxygen at 18%, carbon monoxide at 100 ppm and hydrogen sulphide at 25 ppm, making it an ideal reference gas for routine testing of instruments fitted with LEL, O2, CO and H2S sensors.

This quad gas mix is widely used across industrial safety applications and is especially suitable for detectors used in confined space entry, maintenance work and hazardous area monitoring. Regular calibration with a certified four-gas mix helps ensure accurate readings, dependable alarm response and compliance with manufacturer recommendations.

At Q Instrument Services, we supply high-quality calibration gas cylinders throughout Ireland with expert technical support and fast delivery. Whether you need a single cylinder or ongoing supply for your gas detection programme, we can help you choose the right solution for your equipment.

Key Features

• Methane 2.2% by volume (50% LEL).

• Oxygen 18%.

• Carbon monoxide 100 ppm.

• Hydrogen sulphide 25 ppm.

• Ideal for gas detector calibration and bump testing.

• Suitable for portable multi-gas monitors.

• Helps maintain accuracy and compliance.

• Available for delivery throughout Ireland.

• Backed by expert support from gas detection specialists.

Typical Applications

• Portable gas detector calibration.

• Bump testing.

• Confined space entry.

• Industrial maintenance.

• Utilities and energy sectors.

• Wastewater treatment.

• Chemical and pharmaceutical facilities.

• Oil and gas applications.

• General industrial safety programmes.

Why Choose Q Instrument Services?

Founded in Cork in 2000, Q Instrument Services is one of Ireland’s leading specialists in gas detection equipment, calibration gases and servicing. We supply trusted calibration gas solutions to pharmaceutical, manufacturing, utilities and industrial customers nationwide, backed by expert technical support and decades of experience.

Order your standard 4-gas calibration gas mix today to keep your gas detectors operating safely, accurately and in line with manufacturer recommendations.