A wearable air quality monitoring system that makes use of a complementary range of sensing technologies to provide a complete and reliable assessment of the air quality in the immediate vicinity of the wearer.

Electrochemical cells, a laser optical particle monitor, temperature and humidity sensors are included in the system, which also incorporates a highly-sensitive GPS receiver and 3 axis accelerometer. A microphone is fitted to monitor ambient noise. A basestation provides a docking unit to store the sensor unit at night and to allow access to a regulated 12V supply to power the battery charging circuit.The basestation is fitted with a GPRS modem, patch antenna and SIM card, which are used to transmit the data that are saved on the unit during the day to a central monitoring site.

Specification
accurate electrochemical cells (Alphasense A4) monitoring CO, NO, NO2, and O3. Other sensors available on request.
optical particle counter (Alphasense).
temperature and relative humidity sensor (Atmospheric Sensors).
MEMS 3-axis accelerometer to detect movement.
GPS module with integrated antenna
microphone to detect ambient noise level.
high-capability 32-bit ARM microcontroller.
bi-colour LED to indicate battery state-of-charge and correct operation of the unit.
battery and compatible charger circuit to give 24 hours running and some contingency (two 18650 lithium-Ion cells).
SD Card storage up to 32GB.
supplied with a shoulder strap and belt clip so can be worn in different ways.