Aeroqual's home, Mt Eden

The home of clean air, Auckland NZ.

aAeroqual is leading the move towards sensor-based air quality monitoring, a technology and market shift that promises to deliver better air quality for governments, industry, and citizens alike.

Established in 2001, Aeroqual has spent more than a decade perfecting sensor-based air quality measurements in a variety of applications and climates in more than 50 countries worldwide. The company’s products have been tried and tested by blue chip customers such as Dubai Municipality, Vale, EDF Energy, and Samsung. As the shift towards sensor-based air quality monitoring accelerates Aeroqual is setting the standard for others to follow.

Sensors have many advantages over traditional measurement techniques but so far few companies have been able to produce credible and defensible air quality measurements. This is especially true in outdoor ambient monitoring applications where low detection levels and environmental factors make sensor-based measurement extremely challenging.

Making defensible air quality measurements using relatively low cost sensors requires unique skills and experience. Aeroqual has deep and multi-disciplinary expertise covering:

  • Sensor design, fabrication and calibration
  • Signal processing and algorithms
  • Instrument design and development
  • Application and support of instruments in the field
  • Atmospheric science

As well as possessing world class technology Aeroqual has invested in bespoke production facilities in Auckland, New Zealand and operates a quality management system certified to ISO 9001:2008. Our people are experts in the field, determined to help customers realize the benefits from sensor-based air quality measurement.


Aeroqual early prototype, 2001

IIt began back in 2000 when two scientists, Dr Geoff Henshaw and Professor David Williams, started thinking about better, cheaper ways to measure air quality.

Henshaw and Williams wanted to gather air quality data for a study, and lots of it. Frustrated by the high cost and low mobility of analyzer technology, they wondered if low cost sensors could be used instead. They envisioned a network of sensors deployed across a city, measuring and transmitting air quality data wirelessly and in real-time. Using their expertise in heated metal oxide sensors they set about building a prototype, founded Aeroqual, and applied for one of the company’s first patents.

Then in 2001 the US Food and Drug Administration approved ozone as a sterilizing agent and that prompted a change in Aeroqual’s direction. One prototype sensor was particularly good at measuring ozone and this led to a small but promising business providing ozone monitors to the growing ozone industry in the US. Professor Williams continued his research at the University of Auckland while Henshaw stayed on as Chief Technology Officer. Aeroqual grew from two to a team of ten full time employees, selling products all over the world.

But the idea of using low cost sensors to measure air quality across wide open spaces never went away. So when a customer asked the team if they could make a multi-sensor instrument for measuring outdoor air quality, they jumped on it. That project led to the creation of the AQM 60 compact air quality station. Customers from developing countries with poor air quality and limited air monitoring infrastructure showed huge interest in the AQM 60, and Aeroqual had found another winner.

In 2012 the company had tripled in size and was selling more products in more places than ever before. But the business had become complex and needed help embedding systems and processes necessary for sustainable growth. Staff and shareholders wanted a clearer sense of purpose and decided on a change of management. Mark Templeton, already a director of the company, stepped in as CEO in June 2012, joined by Carl Beck in charge of sales and marketing. The continued presence of Dr Henshaw and most of the staff ensured little was lost in the transition.

Two years later and we have gone back to our original vision – providing people, companies and governments with cost effective and reliable air quality information using networks of sensor-based instruments.

MMaking defensible air quality measurements using low cost sensors requires unique skills and experience. Aeroqual has deep and multi-disciplinary expertise covering:

Sensor design, fabrication and calibration
Signal processing and algorithms
Instrument design and development
Application and support of instruments in the field
Atmospheric science

Our expertise in heated metal oxide sensor can be traced back to the Atomic Energy Research Centre at Harwell in the UK in the 1980s. Professor David Williams was part of a group working on advanced sensing technologies and went on to build a centre of excellence at University College of London. A New Zealander, Prof Williams invited a number of young Kiwi scientists to join him to carry out post doctoral research, including Aeroqual’s CTO Dr Geoff Henshaw.

That expertise in heated metal oxide sensors has evolved into what we call gas sensitive semiconductor (GSS) technology. GSS technology covers the sensor, circuit, controls, packaging, and calibration needed to get the very best out of a sensor in any given application. We use GSS technology to derive ppb level measurements of ozone, nitrogen dioxide, nitrogen oxides, and volatile organic compounds.

In recent years we have applied the technology to other kinds of sensors including electrochemical, near dispersive infrared (NDIR), and photo-ionisation detectors (PID), as well as optical sensors for measuring particulate. Using different kinds of sensor technologies means we can use the strengths of one type to complement the weakness of another – resulting in a better set of measurements over all.

At our bespoke production facilities in Auckland, New Zealand, we continue our rich tradition of science and innovation. In terms of technology our aim is simply to make the best possible air quality measurements using sensors.

Winner: Most Innovative Hardware Solution
Our AQM 65 compact air quality monitoring station took the top award for hardware at the 2016 NZ Hi Tech Awards. The product won the Most Innovative Hi-Tech Hardware Solution category.
ISO 9001-2008 Certified
Our certification under ISO-9001-2008 is a result of increased emphasis on quality systems at the company. Our customers and partners can expect to benefit from this certification too – through better products and services and our commitment to relentlessly improve.
MCERTS, a world first
Our Dust Sentry was the world’s first nephelometer to pass MCERTS, the pioneering indicative particle monitoring standard of the UK’s Environment Agency. To do so required a 40-day head to head comparison between two Dust Sentries, two beta attenuation monitors (BAMs), and a FRM partisol.
Recognized by the US EPA
In their 2014 Air Sensor Guidebook featuring low cost air sensors Aeroqual’s Series 500 was highlighted among a handful of manufacturers. We were featured for our ozone, nitrogen dioxide, and carbon monoxide sensors.


  • Carl Beck

    VP Commercial
      Carl is responsible for growing revenue and gross margin at Aeroqual (and has done a great job of growing both since joining us back in early 2012). In practice this means wearing many hats – sales, marketing, product management, customer support, business development and technical services – as well as setting and driving the business […]
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    • Simon Bennett

      VP Product Development
        Simon is Mr Product. Together with Carl and Geoff he shapes the products we make, then leads the considerable effort needed to bring them to fruition. These days that is as much about software as hardware, coupled with the deep sensor tech knowledge that is the bedrock of Aeroqual. Since joining us in the service […]
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      • Dr Geoff Henshaw

        Co-Founder & CTO
          As one of the original founding pair Dr Geoff really has been here since the beginning. The vision that Aeroqual pursues today is largely the vision Geoff and co-founder David Williams had since day one. (For more about our history please see the History tab above.) Geoff leads technology development and the advancement of intellectual […]
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        • Paul Pickering

          Global Key Account Manager
            Paul looks after our most important customers and is the global ambassador for our flaghip AQM 60 product, a product that over the last 9 years he has been instrumental in commercialising, gaining acceptance for, and developing into the category busting product it is today. His job requires a great deal of patience, an ability […]
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          • Mark Templeton

            Chief Executive Officer
              Mark has been keeping us in check since about mid 2012 when he took over as CEO after a year on the Board. He has lots of experience building technology intensive businesses into international powerhouses (impressive, considering the struggles he has with his email..). One of the biggest changes Mark has brought to Aeroqual is […]
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            • Jeremy Turner

              VP Production
                Jeremy’s job is to make sure that all our sensors and instruments are produced, calibrated, checked, and delivered on time. He manages a team of in house technicians as well as a vast network of specialist suppliers and somehow makes it all come together in the end. Prior to joining Aeroqual 7 years ago Jeremy […]
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              • Dr John Wagner

                Training & Support Manager
                  John is hard to pin down. Half of the time he’s travelling the world training our customers in far off places. The other half of the time he’s back here in the office poring over screeds of air quality data sent to him by customers wanting to know what’s up with their air. As Training […]
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