airpointer® compact air quality monitoring system


number 1 compact air quality monitoring system

airpointer® number 1 compact air quality monitoring system

The airpointer® is the world’s first integrated, certified and type approved according to European Norms and the regulations of the US Environmental Protection Agency, compact air quality monitoring system.

A turn-key product that can be quickly and easily installed with 50% lower total cost of ownership than conventional metering stations.

A modular system equipped with gas analysers from Thermo Fisher and/or Teledyne API, also allowing customised add-ons (e.g. vehicle counters, noise sensors, wind sensors).

There are over 500 airpointer® units installed globally.

Due to its small size and weight, the airpointer® can be installed in a wide variety of indoor and outdoor applications including among others public places, industrial sites, traffic sites, and meteorology, as well as in diverse environmental conditions.

nox monitoring

What is Nitrogen Oxide?

The nitric oxide (NO) molecule is quite reactive and unstable. In ambient air, it reacts with oxygen to form the toxic nitrogen dioxide (NO2).

Where does Nitrogen Oxide come from?

Nitrogen oxide is mainly an unwanted by-product of fuel combustion at high temperatures. Cars and power plants are the main sources of nitrogen oxide.

 What are the effects of Nitrogen Oxide?

Nitrogen oxide causes a multitude of symptoms, primarily in the lungs but also in other organs such as the spleen and liver. Additionally, nitrogen oxide is jointly responsible for acidification and over-fertilisation of soil and water. Gaseous nitrogen oxide may become particulate ammonium nitrate. This contributes to large-scale PM (PM2.5, PM10) pollution. During the summer, nitrogen oxide and hydrocarbons cause formation of ground-level ozone and destruction of the ozone layer.

Measurement Principle:
Chemiluminescence (EN14211)

Nitric oxide in sample gas reacts with ozone to form nitrogen dioxide. This reaction results in electrically excited molecules. These molecules release their excess energy by emitting photons, which are measured by a photomultiplier tube. The airpointer NOX module is equipped with a delay loop to measure NO and NO2 from the same sample.

Zero Air Supply Check and Span Point Check

Zero air supply is part of the standard equipment so that a zero point check may be carried out automatically (e.g. daily).
An internal NO2 source for a regular span point check is available as an option.

EU Directive / USEPA Procedure Chemiluminescence (EN14211)
Measurement principle Chemiluminescence
Range Dynamic, up to 20 ppm
Zero noise 0.2 ppb RMS
Lower detection limit 0.4 ppb
Zero drift (24 hours) < 0.4 ppb
Span drift (24 hours) +/- 1% of reading > 100 ppb
Response time < 60 seconds
Precision 1% of reading or 1 ppb (whichever is greater) @ < 500 ppb ±1% of reading >100 ppm
Linearity +/- 1% of reading >100ppm
Sample flow rate 1000 ml/min
Weight 12.0 kg/ 26.5 lbs