Cirrus research MO903 Air Quality Monitor (154 x 154 x 130 mm)

Sensing

One Alphasense electrochemical sensor or NDIR for CO2 or PID for VOCs

Ultra low-noise circuitry maximises repeatability of electrochemical sensing.

Alphasense OPC-N3 particle counter, plus approximated readings up to 40 microns.

Sensirion temperature/relative humidity sensor, TDK digital barometer

Data correction refined through co-location with government reference equipment.

Variable sampling rates with a frequency up to every two seconds.

Communications

4G mobile comms for real-time data delivery to the cloud.

GPS / GLONASS receiver.

Wired: ethernet via waterproof RJ45 connector.

Platform: 

Runs Debian Linux operating system for robust operation and ease of integration with other sensor systems.

SAMA5D27 CPU.

Real-time clock with battery backup. Time synchronisation is via GPS receiver, network time protocol or real-time clock, as available.

Data infrastructure

Sense data messaging, control messaging and data storage using Amazon Web Services (AWS) or customer’s own infrastructure.

Local microSD data storage.

General

DC power input from 7 to 24 Volts, rechargeable backup battery (>1 hour operation).

Environmental range from -40 to +50 C.

Measures: 154 x 154 x 130 mm.

Weight: 2 kg.

Power consumption: ~2W.

Datasheet