Cirrus research MO904 Air Quality Monitor (250 x 200 x 147mm)

Sensing

Alphasense analogue front-end (AFE) supporting up to four A4 electrochemical sensors. Additional NDIR CO2 via a separate interface. Other combinations on request

Particulate monitoring uses Alphasense OPC-N3 particle counter

Sensirion temperature and relative humidity sensor

TDK barometric pressure sensor

Ultra low-noise circuitry maximises repeatability of electrochemical sensing

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

Communications

Wired: ethernet via RJ45 connector

Wireless: 4G cellular modem

GPS receiver

Platform

AM335x ARM Cortex-A8 through BeagleBone Black

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 12 V, rechargeable battery (approximately two hours operation)

Environmental range from -40 to +50 °C

Dimensions: 250 x 200 x 147mm

Weight: 4 Kg

Power consumption: ~4 W

Datasheet