Outdoor Air Quality Sensor AAQ

Ambient Air Quality Sensor

Intended to measure the Air Quality Atmospheric

The AAQ probe is used to measure the local outdoor air quality. It is possible to install it easily on building facades, on bus shelters, on posts, pylon and lighting fixtures. Son design allows for discreet integration.  

The AAQ probe can be used in addition to the Indoor Air Quality probe EP5000to compare indoor air quality with outdoor air quality. 

In addition, today, Monitoring outdoor air quality, ambient noise and other environmental aspects are essential indicators to help protect the health and well-being of citizens. 

The QAA measures the exposure to outdoor pollutants and environments and allows to identify for example the pollution peaks.

Its modular design allows it to meet different types of needs with an affordable product made in France.

Modularity of the probe QAA

The probe is equipped with 4 sensors by default: 

Fine particles, temperature, humidity and air pressure.  

It is possible to add additional sensors among these six (see availability):

 Noise, Ozone, NOx, Ammonia, SO2, H2S. 

Smart Building

The main objective of the QAA sensor is to provide the building with relevant information to be compared with the indoor environment data in order to inform the occupants on the opportunity to open the windows. 

The measurement of the outside temperature allows to activate the "Free-Cooling" (over-ventilation at night during the summer period). 

The information provided by the probe allow to facilitate the predictive maintenance of the building: Change of the fine particle filter. 

Configuration recommended

Smart City

The QAA measures air pollution in real time, gathering valuable information about population exposure.

These measurements, combined with data from other sources (traffic, public transport, etc.), help local authorities to optimize their cited: public awareness, EPZ, district heating, traffic flow, vegetation, traffic restrictions.

Configuration recommended


The QAA probe can power a cloud or local monitoring application.

The historization, the graphical representations and the data analysis associated with the weather allow a good understanding of the pollution phenomena. 

Configuration recommended

Fine particles: An invisible danger

Fine particles are included in the list of priority pollutants with reinforced monitoring at the national level. According to an estimate by Santé Publique France in 2016, particulate matter is responsible for 67,000 deaths per year. 

More generally, these fine particles have negative consequences on respiratory and cardiovascular health. They can cause inflammation of the airways and lungs which impairs the immune response and reduces the ability of the blood to carry oxygen.

The filters placed in the buildings (when they are present) make it possible to retain the fine particles and to ensure a "new" air of quality inside. These particles will accumulate as time goes by, until the air filter can no longer fulfill its role and will generate an overconsumption of the ventilation system.

 The QAA probe allows to check the efficiency of the filters of the ventilation systems, by comparing the concentration of fine particles outside with inside. 

Fine particles are categorized by their micron size because the smaller they are, the more harmful they can be. 

The QAA probe measures PM10, PM2.5 and PM1 (10, 2.5 and 1 µm).

Types of fine particles PM

Values limits

PM10 (<10 µm)
Daily limit P50*50 µg/m3 (less than 35 times/year)50µg/m3150µg/m3
Annual Limit
30µg/m320µg/m3Cancelled in 2006
PM2.5 (<2.5 µm)
Daily limit P50*25 μg/m3
Daily limit P98*35 µg/m3
Annual Limit25 µg/m3 in 2010; 20 µg/m3 in 202010 µg/m315 µg/m3

*: The value should not exceed 50% (98%) of the time.
PM1s are not yet regulated

The QAA probes are dedicated to outdoor measurement, which is an extreme environment that can reduce the lifetime of the sensors. NanoSense has designed QAA probes capable of withstanding this outdoor environment: certified telecom case, tropicalized electronic boards...

Rainproof Telecom case

The probe is protected against rainwater up to 60° of the vertical. 

Its installation in altitude (>= 3 m) does not require protection against solids for a good circulation of pollutants.  


Power supply 12 to 32V DC or 12 to 24V AC.


 Can be associated with the EP5000 sensor (EnOcean protocol). 

Compatible with a wide range of schools.cosystems building.

Up to one measurement per minute for optimal granularity.

 Parameterizable by NFC (Addresses, type (RTU/ ASCII), Modbus speed, radio demissions rates ...)

Digital output RS485 Modbus (or EnOcean or LoRaWAN)

Modular sensors and communication protocols

 10 year life span.

Installation of the probe QAA

  Installation with two screws on the front

  Fixing by serflex on pole or pylon

 Easy to set up and use  

 Discreet design 

Consult the documentation for more information

The protocols of communication


LoRaWAN technology allows to send a small amount of information to a receiver located at a distance between 5km (urban area) and 20km (rural area). LoRa QAA probes can work with operated or private LoRaWAN networks. The downlink downlink LoRaWan downlink channel of the EP5000 probes allows to retrieve data from two QAA probes.


This is the basic version of the probe. A PLC interrogates the sensor from up to 254 addresses. The advantage of ModBus is that the bus length can be up to 1.2km. A PLC can send data from two QAA sensors to EP5000 sensors.

The EnOcean technology is based on wireless energy recovery technology for battery-free and wireless sensor solutions (mini solar cells). Several hundred companies are members of the EnOcean Alliance. The EnOcean protocol guarantees interoperability between the different products of these manufacturers.
Telegrams from two QAA sensors can be sent to an EnOcean IP gateway or directly to QAI EP5000 sensors.

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