AirPublic Sensorbox

Infosheet & Technical Specifications

Version: 4.0

09.01.2019

  1. Description:

The AirPublic sensorbox is a vehicle mounted or fixed location unit that is able to sense various air pollutants and use LoRa or Cellular network connectivity to transmit the recorded readings along with GPS location to a remote server. The unit has dual redundancy gas and PM sensors to improve the reliability of the reading. The unit can be powered in a number of ways, depending on power sources available in the context.

  1. Features:

The AirPublic sensorbox is able to sense:

Additionally, SO2 an/or CO can be incorporated on request

  1. Dimensions:

Main unit without bracket:

Bracket: Fixed 200mm x 230mm bracket with 6 M6 mounting holes

LoRa antenna: Allow 50mmx10mm

  1. Power usage: 

Power options are flexible depending on context:

  1. Connections:

  1. Data outputs

The data visualisations are flexible and can be created in dialogue with the client, depending on the decisions to be made or actions taken. Live data can be viewed through the dashboard.

  1. Electrical and sensor device specifications

  1. Electrical:

Value

Unit

Input voltage min

9

V

Input voltage max

24

V

Nominal current draw

300

mA

Peak current draw

1

A

Fuse rating

1.8

A

  1. Operation:

Value

Unit

Time resolution (readings)

30

s

Recommended installation height above ground

3

m

  1. Internal sensor devices:

Value

Unit

Noise Range

0-100

uncalibrated

NO2 Sensor Response Time

60

s

NO2 Sensor Range

0-20

ppm

NO2 Sensor Noise (+- 2σ)

15

ppb

NO Sensor Response Time

25

s

NO Sensor Range

20

ppm

NO Sensor Noise (+- 2σ)

80

ppb

O3 Sensor Response Time

20

s

O3 Sensor Range

0-500

ppm

O3 Sensor Noise (+- 2σ)

20

ppb

PM Sensor Response time

10

s

PM Sensor Sampling interval

200

ms

PM Sensor Flow Rate

0.1

L/m

  1. Comparison with reference monitor during field co-location. R2= 1 - (residual sum of squares)/(total sum of squares)

Pollutant species

R2

NO2

0.73±0.09

PM10

0.82±0.14

PM2.5

0.84±0.17

PM1

0.91±0.08

O3

On-going co-location

NO

On-going co-location