Household Air Pollution (PATS+)

Track household air pollution and personal exposure with Berkeley Air’s own HAP sensor solution. The PATS+ sensors are small, portable data logging instruments that measure real-time particulate matter (PM2.5) concentrations. PATS+ operates within our Platform for Integrated Cookstove Assessment (PICA) which launches, downloads data, and displays collected information.

Specification Highlights

  • Lower particulate matter detection limit (PM2.5): 10–20 μg/m3
  • Upper particulate matter detection limit (PM2.5): 30,000–50,000 μg/m3
  • Data logging via SD card
  • Internal, rechargeable battery with a run-time of >80 hours
  • Optional external battery can extend run-time to weeks
  • Logs PM concentration, temperature, humidity, movement, and battery voltage
  • Optional sensor for carbon monoxide (CO) (0-500 ppm)
  • Logging interval: 2 seconds to 1 hour

Figure 1: Berkeley Air’s PATS+ in the field during a 2019 cookstove monitoring project in Ethiopia.

Instrument Specifications


  • Dimensions: 13×7.2×3.3cm
  • Weight (w/battery): 110g

Sampling Condition Limits

  • Operating temperature: 0–50°C (32–120°F)
  • Operating humidity: 0 to ~95% RH, non-condensing

Detection and Data Capabilities

  • Lower particulate matter detection limit: 10 μg/m3 under most conditions
  • Upper particulate matter detection limit: 30,000–50,0000μg/m3
  • Data logging via SD card
  • Logs PM concentration, temperature, humidity, movement, and battery voltage.
  • Optional sensor for carbon monoxide (0–500ppm)
  • Logging interval: two seconds to one hour

Power and Runtime

  • Internal, rechargeable battery: run-time: >80 hours
  • External battery can extend run-time to weeks

Parts and Accessories

The complete PATS+ kit will include all of these separately prices items:

  • PATS+
  • Micro-USB data cable
  • Zeroing box and pump: Each box is air-tight and features a built-in HEPA filter to flush the box with clean, particle-free air, as well as a fitted one-way valve to prevent back-flow during the zeroing period. Zero boxes have been designed and lab tested with field conditions in mind, and are essential for zero calibration of particle-monitoring instruments in the field
  • PICA (Platform for Integrated Cookstove Assessment) software
  • CO Sensor (Optional with additional charge)

Storage Recommendations

  • Storage temperature: 4–38°C (40–100°F)
  • When not in use, keep in a sealed Ziploc (airtight) bag in a box in a safe location

Management Software

The Platform for Integrated Cookstove Assessment (PICA) is a robust, inexpensive sensor and software platform for collecting in-field stove performance data, including household air pollution, personal exposure, emissions, and stove usage.

PICA makes field testing of stoves and other household energy devices more efficient, more accurate, more accessible, and therefore, more cost effective.

Software Features

  • Launches PATS+, SUMS, and iButtons.
  • Downloads PATS+ and SUMS data.
  • Can merge PATS+ with SUMS data and save in a single file
  • Accesses settings for log interval, adding reference notes, and choosing GPS location.
  • Particle concentration estimates based on internal lab-based calibration
  • Option to include field-based adjustments
  • Excel output file with PM estimate
  • Interactive graphical representation of real-time data
  • Map of GPS coordinates
  • Can image multiple files and metrics on a single plot
  • Statistical analysis of collected data
  • Excel output file with PM estimate and statistical calculations

System Requirements

  • Windows 64-bit Operating system (7 or later)
  • Latest .NET framework installed
  • Virtual COM port drivers installed (automatic for most Windows-based systems)