Personal Air Monitor (PAM)

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  • Uses air pollution sensors in a compact, portable package
  • Maps and graphs pollution levels in a Smartphone app, 2B Connect
  • WiFi upload to the 2B Tech Data Portal
  • With the cellular option, uploads data via cellular service to the 2B Tech Data Portal
  • Serial capability for computer access
  • Measures the air pollutants for which sensors are highly reliable
  • Includes sensors for particulate matter (PM1, PM2.5) and carbon dioxide (CO2) 
  • Customizable, so in addition the customer can choose to measure any two of the following: CO, NO2, SO2, and/or total VOCs


Applications

Mobile Mapping of Pollution Using Our CarTopper
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The PAM can catch a ride on any vehicle in our CarTopper.
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The PAM in this CarTopper is being used to measure air pollutants along the route of this school bus.
Stationary Monitoring Using our PAM Outdoor Enclosure
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The PAM Outdoor Enclosure
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The PAM was presented to the Government of Guatemala for their use in monitoring pollutants.
PictureGive your students a hands-on experience of measuring air pollution. Students can view data in real time on their smartphone, and analyze the data later in the classroom.
Education

Please see our Education webpage and the paper linked below for ideas about using the PAM for student learning!

​Global Ozone (GO3) Project and AQTreks: Use of Evolving Technologies by Students and Citizen Scientists to Monitor Air Pollutants, J.A. Ellenburg, C.J. Williford, S.L. Rodriguez, P.C. Andersen, A.A. Turnipseed, C.A. Ennis, K.A. Basman, J.M. Hatz, J.C. Prince, D.H. Meyers, D.J. Kopala, M.J. Samon, K.J. Jaspers, B.J. Lanham, B.J. Carpenter and J.W. Birks, Atmospheric Environment X 4, 100048 (2019). 

Features

  • Measures CO2, PM1, PM2.5, pressure, and instrument temperature/relative humidity
  • Customizable to add sensors for any two of the following:  CO, NO2, SO2, total VOCs.
  • Bluetooth data transmission to nearby mobile phones (IOS and Android)
  • Mobile phone app for real-time mapping and graphing of data
  • WiFi data upload to the 2B Technologies Data Portal
  • Serial capability for computer data access and control
  • Option for real-time cellular data transmission to the Cloud, with data access via the 2B Technologies Data Portal
  • Internal GPS
  • Micro-SD data storage
  • Rechargeable 3.7 V, 200 mAh battery with 6-hr to 8-hr life
  • Optional NEMA stationary PAM enclosure for fixed-base monitoring
  • Optional 2B Technologies CarTopper for mobile monitoring via any vehicle

PAM Specifications

 

Overall Specifications

 


Weight

0.96 lbs (0.44 kg)


Power Requirements

< 0.2 amp at 12V, 2.4 watt

Dimensions


6.3" L x 3.1" W x 2.2" H (16 cm x 8 cm x 5.7 cm)

 

Sensor Specifications (per manufacturer)

 

Carbon Dioxide (CO2)


Sensor: Telaire T6713 (NDIR)

Measurement Range: 0-5000 ppm

Accuracy: 400-5000 ppm: ± 30 ppm, ± 3% of reading

Response Time: < 3 min for 90% step change

Particulate Matter (PM1, PM2.5)


Sensor: Plantower PMS7003 (Laser Scattering)

Particle Size Range: 0.3-10 μm

Mass Concentration Range: 0-999 μg/m3

Count Accuracy: 50% @ 0.3 μm, 98% @ ≥ 0.5μm
Response Time: < 10 s

Carbon Monoxide (CO)


Sensor: Alphasense CO-A4 (Electrochemical)

Measurement Range: 0-500 ppm

Precision: contact 2B Tech for information

Response Time: < 30 s for a 10-ppm step change

Total VOCs


Sensor: ION Science Mini-PID2 HS (Photoionization)

Measurement Range: 0 to 3 ppm

Minimum Detection Limit: 0.5 ppb

Response Time: < 12 s

Sensitivity: > 600 mV per ppm

Nitrogen Dioxide (NO2)


Sensor: Alphasense NO2-A43F (Electrochemical)

Measurement Range: up to 20 ppm

Noise (±2 SD): ±15 ppb equivalent

Response Time: < 80 s from 0 to 2 ppm NO2

Sulfur Dioxide (SO2)


Sensor: Alphasense SO2-A4 (Electrochemical)

Range: up to 50 ppm

Noise (±2 SD): ±15 ppb equivalent

Response Time: < 20 s from 0 to 2 ppm SO2

Pressure


Sensor: Bosch BME680

Measurement Range: 300 to 1100 hPa

Accuracy: ±1.0 hPa

Resolution: 0.18 Pa

Long-Term Stability: ±1.0 hPa per year

PAM Instrument Temperature and Relative Humidity


Sensor: Honeywell HIH8120 (Platinum RTD / Capacitive)

Measurement Range: 0-65 °C / 0 to 100 %RH

Accuracy: ± 0.5 °C from 5 °C to 50 °C / ± 2 %RH

Response Time (RH): 8 s