Ambient Gas Measurement and Monitoring
Thomson Environmental Systems supplies world-standard ambient gas monitoring instrumentation to specification and legislative requirements — minimising the risk of fines, decreasing ownership costs and providing stable and accurate gas measurement and monitoring.
Our family of instruments offer high-precision gas measurements for diverse environments. Whether you’re measuring site-specific emissions or monitoring criteria pollutants, TES provides integrated systems to monitor gas reliably and economically.
Ambient gas measurement is crucial for protecting public health and the environment. The EPA has developed National Ambient Air Quality Standards (NAAQS) for six primary pollutants - known as criteria pollutants — due to their widespread presence and significant impact.
These pollutants are globally regulated because they can:
- Harm human health (especially the respiratory and cardiovascular systems)
- Damage ecosystems, buildings and crops
- Contribute to smog, acid rain and visibility issues
The Six Criteria Air Pollutants:
- Particulate Matter (PM) — including PM10 and PM2.5
- Carbon Monoxide (CO)
- Sulfur Dioxide (SO₂)
- Nitrogen Dioxide (NO₂)
- Ground-level Ozone (O₃)
At TES, we provide innovative air quality solutions to monitor gas concentrations in real time, generate actionable insight and comply with evolving regulatory needs.
EMISSIONS INSTRUMENTS TYPES
Precision instruments for measuring air quality in industrial, regulatory and research applications
TES offers an extensive portfolio of ambient gas monitoring solutions engineered for accuracy, durability and high-performance gas measurement. Our systems measure key pollutants such as NO₂, SO₂, CO and O₃, and are built for robust data delivery in even the harshest environments.
TAPI (Teledyne API) Gas Analysers
TES distributes Teledyne API gas analysers, which are reference-grade instruments used for continuous monitoring of pollutants like NO, NO₂, SO₂, CO and O₃. These are widely used by governments, industrial operators and research bodies for compliance with NEPM and Australian Standard Methods.
FEATURED EQUIPMENT
Comprehensive Gas Monitoring with TAPI and Speciality Instruments
TES offers a full line of TAPI Gas Analysers for continuous monitoring of criterion air pollutants to meet regulatory requirements. These analysers are widely utilised in industry and government networks for accurate, real-time monitoring of major air quality parameters like particulate matter, ozone and nitrogen oxides.
In addition to criteria pollutants, TES supports the measurement of non-criteria and speciality gases required under certain environmental licenses.
We also partner with global technology leaders, including Tekran, Airoptic, Chromatotech, Clarity and Syft Technologies, to deliver quality solutions for specific applications.

Monitored Pollutants and Instruments
Partners and References
Through trusted partnerships, we offer a complete and reliable solution tailored to your needs.
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AMBIENT GAS MONITORING EQUIPMENT
Frequently Asked Questions
Yes. All TES equipment sold in Australia and New Zealand is backed by full local support. Our factory-trained technicians and held spare parts assure prompt assistance — from system design and supply through to installation, calibration and ongoing maintenance. This covers support for special components like gas flow sensors, so your system can be relied upon to perform in all circumstances.
TES offers both standalone reporting systems and AQMS outputs configured for seamless integration with your existing infrastructure. We’ll help you find the right setup for your operation.
Absolutely. TES supplies monitoring solutions that meet US EPA, EU, MCERTS, and both Australian and New Zealand compliance standards.
It’s the long-term measurement of pollutants in outdoor air. Regulated substances — like ozone, particulates and nitrogen dioxide — are monitored continuously to assess public health risks and guide environmental policy.
Government agencies, industrial operators, consultants and research institutions are some of our most valued clients. Our systems are used in mining operations, refineries and tunnel ventilation. In these scenarios, TES delivers dependable, user-friendly gas measurement and monitoring systems for accurate environmental measurements.
LET'S FIND YOUR MONITORING SOLUTION
At Thomson Environmental Systems, we believe reliable equipment is the backbone of confident decision-making. We’re committed to providing high-quality solutions that work — so you can too. Talk to us today.

