AQMS GROUP installs and services fixed Carbon Monoxide (CO), Carbon Dioxide (CO₂), and refrigerant gas detection systems in enclosed car parks and plant rooms, ensuring safe air quality and compliance with AS 1668.2 2012 and Safe Work Australia standards. Codes of Practice | Safe Work Australia

Carbon Monoxide (CO), Carbon Dioxide (CO₂) & Refrigerant Gas Sensor Testing & Calibration

Safety & Compliance for Car Parks and Plant Rooms

Modern buildings rely on gas detection systems to protect occupants, maintenance personnel, and assets. Whether monitoring vehicle emissions in car parks or refrigerant gases in plant and PAC (Precision Air Conditioning) rooms, these systems must be routinely tested and calibrated to ensure accuracy and compliance.

AQMS Group provides comprehensive calibration and programmed maintenance of:

• Carbon Monoxide (CO) sensors
• Carbon Dioxide (CO₂) sensors
• Refrigerant gas detectors (including R143a and R410a)

Carbon Monoxide (CO) Monitoring
Enclosed Car Parks & Vehicle Areas

Carbon Monoxide (CO) is a colourless, odourless and highly toxic gas produced by petrol, diesel and gas-powered engines. In enclosed or underground car parks, CO can accumulate rapidly and create serious health risks if ventilation systems do not activate correctly.

CO sensors are critical for:

• Continuous air quality monitoring
• Triggering mechanical ventilation at preset thresholds
• Preventing exposure beyond safe limits
• Maintaining compliance with occupational health legislation

Under the Occupational Safety and Health Act, CO-controlled ventilation systems must be routinely tested, calibrated, documented and maintained.

Our servicing aligns with:

• AS 1851 – Routine service of fire protection systems and equipment
• AS 1668.2 – Mechanical ventilation for acceptable indoor air quality

Carbon Dioxide (CO₂) Monitoring

Indoor Air Quality & Mechanical Ventilation Control

Carbon Dioxide (CO₂) monitoring is commonly used in commercial buildings, plant rooms and HVAC systems to regulate fresh air intake and maintain acceptable indoor air quality.

Inaccurate CO₂ sensors can result in:

• Poor indoor air quality
• Non-compliance with ventilation standards
• Increased operational costs

AQMS Group provides precision calibration of CO₂ sensors to ensure:

• Accurate ppm readings
• Proper ventilation control response
• Ongoing compliance with building performance requirements

Refrigerant Gas Detection

Refrigerant gases used in air conditioning and cooling systems can pose safety and environmental risks if leaks occur. Gas detection systems installed in plant rooms and PAC rooms must be regularly tested to ensure early leak detection and alarm functionality.

We calibrate and service refrigerant gas detection systems monitoring:

• R143a
• R410a
• Other common HFC refrigerants used in commercial HVAC systems

These gases (often referred to as “Freon” type refrigerants) can:

• Displace oxygen in confined spaces
• Create asphyxiation risks in high concentrations
• Trigger compliance breaches under workplace safety regulations
• Lead to significant equipment and environmental damage if leaks go undetected

Routine calibration ensures:

• Accurate leak detection thresholds
• Proper alarm and shutdown functionality
• Compliance with safety and mechanical services requirements
• Protection of personnel working in plant environments

Our Comprehensive Gas Detection Maintenance Includes:

✔ Test and calibration of all CO, CO₂ and refrigerant gas sensors
✔ Bump testing and span calibration using certified test gases
✔ Control panel and wiring inspection
✔ Verification of alarm set points
✔ Operational testing of ventilation interlocks
✔ VSD verification (if installed)
✔ Mechanical fan operation testing
✔ FIP start/stop testing (where interfaced)
✔ Sensor condition and mounting assessment
✔ Test-date labelling of devices
✔ Detailed compliance service reporting

Sensor Lifespan & Servicing Frequency

• Typical sensor lifespan: 5–8 years
• High exposure environments may shorten lifespan
• Manufacturer testing intervals typically range from 6–12 months and bump tests 3 monthly.

AQMS Group recommends six-monthly programmed maintenance to ensure consistency, reliability and ongoing compliance across all gas detection systems.

Protect Your People, Assets & Compliance

From enclosed car parks to critical PAC rooms and HVAC plant spaces, gas detection systems are essential life-safety and asset-protection controls.

AQMS Group delivers reliable, documented, standards-aligned calibration services that keep your systems:

• Accurate
• Audit-ready
• Legally compliant
• Fully operational when it matters most

Whether you manage a commercial building, data centre, residential complex or industrial facility, our experienced technicians ensure your gas monitoring systems perform as designed.

Contact AQMS Group to schedule your next programmed gas detection service.

Service and Calibration