Why Airsafe for CO, CO2, NO and NO2 testing and monitoring?
Airsafe offers testing, monitoring and consultancy to control the risk of exposure to dangerous gases – and the reassurance of dealing with one of NSW’s most experienced and respected occupational hygiene consultancies.
We carry out indoor and outdoor air quality assessments covering all the potentially dangerous gases, using calibrated direct-reading instruments to measure the concentration of each gas in the air. If any gas exceeds the relevant exposure standard, we recommend specific, actionable steps to keep your workers safe.
Carbon monoxide, carbon dioxide, nitric oxide, nitrogen dioxide: what’s the difference?
Carbon monoxide (CO) often comes from vehicle exhaust, and can enter buildings through poorly located air intakes, from basement car parks, or via stairwells and lift shafts. Other major sources are cigarette smoke and combustion appliances such as gas stoves. Even at low levels, CO can cause dizziness, nausea and fatigue.
Carbon dioxide (CO2) is a product of human breathing, cigarette smoke and vehicle emissions. CO2 levels are a useful indicator of how “stale” the air is and whether a ventilation system is doing its job; CO2 only becomes a pollutant at very high concentrations.
Nitric oxide (NO) is an air pollutant produced by cigarette smoke, power plants and vehicle engines.
Nitrogen dioxide (NO2) is a reddish-brown toxic gas with a sharp, biting odour, and a prominent air pollutant. Both NO and NO2 are produced by high-temperature combustion.
See the Safe Work Australia website for current workplace exposure standards for airborne contaminants.
Exposure standards and your duties
Safe Work Australia sets exposure standards for each of these gases (becoming workplace exposure limits from December 2026). When we test, we compare the results against the relevant limit to tell you whether you need to act.
Under the NSW Work Health and Safety Regulation, a person conducting a business or undertaking (PCBU) must ensure that no one at the workplace is exposed to an airborne concentration above the exposure standard. That’s difficult to do without professional testing, monitoring and advice – which is where Airsafe’s occupational hygiene team comes in.
4.9 stars from over 600 Google reviews and counting, from builders, contractors and industrial clients across Australia.
“We recently appointed Airsafe to undertake air monitoring and reporting at a brownfield development site during the demolition stage. Their proactive, professional and cost and time-efficient approach and implementation were excellent.”– Carl O. Peterson, December 2021
“I use Airsafe on a regular basis for commercial construction. Liam Matthews and the Airsafe team always get the job done professionally, safely, and in a prompt manner as required. If only I could give more stars.”– Jordan Kissane, September 2021
“AIRSAFE has become our go-to company for all air monitoring needs. Working for a large paint company, we’ve found their service not only exceptional but also backed by valuable advice. They are consistently reliable, flexible, and a pleasure to work with. These qualities made it an easy decision to choose them as our preferred supplier.”– Nik Pappas, November 2025
Managing exposure to carbon monoxide and other gases
As a person controlling a business or undertaking (PCBU), you are required by Work Health and Safety regulations to ‘ensure that no person at the workplace is exposed to a substance or mixture in an airborne concentration that exceeds the exposure standard for the substance or mixture’.
Complying with this requirement is difficult without access to professional air quality testing, monitoring and advice. Airsafe have specialist knowledge in potentially dangerous gases and can provide efficient carbon dioxide testing solutions for your workplace.
FAQs
-
Most often from vehicle exhaust – it builds up in basement car parks, loading areas and partially enclosed spaces, and can get into buildings through poorly located air intakes, stairwells and lift shafts. Combustion appliances like gas stoves and heaters are another source, as is cigarette smoke. Because CO is colourless and odourless, the only way to know your levels is to measure them.
-
Yes – Safe Work Australia sets an exposure standard for carbon monoxide and the other gases (these become workplace exposure limits from December 2026). When we test, we compare your results against the relevant limit and tell you whether you need to take action. Call us on 1300 888 338 to arrange testing.
-
We carry out indoor and outdoor assessments using calibrated direct-reading instruments that measure the concentration of each gas in the air in real time. You get a clear report on what was found, how it compares against the relevant limit, and what to do about it.
Contact us for carbon monoxide testing today
Carbon monoxide and other dangerous gases are invisible – testing is the only way to know your workers are safe.
We work across Sydney, NSW and Australia, with travel built into our quotes for sites further afield.
Contact us for a fast quote on carbon monoxide and dangerous gas testing, or call Airsafe on 1300 888 338.
Last updated: May 2026
