PurpleAir PA-I-Indoor
PurpleAir PA-I-Indoor
PurpleAir PA-I-Indoor
The PA-I-Indoor is PurpleAir's indoor air quality sensors measure particulate matter (PM).

PurpleAir PA-I-Indoor

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Indoor air quality sensor for your home or office with a built in LED that illuminates the current Air Quality Index color for instant awareness of changes in indoor air quality. A simple design that sits on a counter or table top to measure real time PM2.5 concentrations. WiFi capabilities to connect the sensor to the PurpleAir map and enable data access from any smart device.

Dimensions 3 in x 4 in x 2.75 in
(102 mm x 76 mm x 70 mm)
Color Translucent white with real-time AQI colored LED light
Intended Use Indoor use only
WiFi Yes
Internal Storage No
Warranty One (1) year limited warranty
Dimensions 3 in x 4 in x 2.75 in
(102 mm x 76 mm x 70 mm)
Sensor weight 6.4 oz (181 g)
Power supply length 3.2 ft (1 m)
Color Translucent white with real-time AQI colored LED light
Power Supply
A/C input 100-240V AC, 50/60Hz, 0.2A
A/C output 5V DC, 1.4A
Sensor input 5V DC, 0.18A
Weather resistance Indoor use only
Plug type 2 Pins, Type A
Wireless Networks 802.11b/g/n @ 2.4GHz
(WPA2 pre-shared key or open networks)
Certificates FCC/CE/ TELEC/SRRC
Tx Power 802.11 b: +20 dBm
802.11 g: +17 dBm
802.11 n: +14 dBm
Rx Sensitivity 802.11 b: -91 dbm (11 Mbps)
802.11 g: -75 dbm (54 Mbps)
802.11 n: -72 dbm (MCS7)
Antenna Type External, IPEX Connector, Ceramic Chip
Laser Particle Counters
Type (1) PMS1003
Range of measurement 0.3, 0.5, 1.0, 2.5, 5.0, & 10 μm
Counting efficiency 50% at 0.3μm & 98% at ≥0.5μm
Effective range
(PM2.5 standard)*
0 to 500 μg/m³
Maximum range (PM2.5 standard)* ≥1000 μg/m³
 Maximum consistency error (PM2.5 standard) ±10% at 100 to 500μg/m³ & ±10μg/m³ at 0 to 100μg/m³
 Standard Volume 0.1 Litre
 Single response time ≤1 second
 Total response time ≤10 seconds
Pressure, Temperature, & Humidity Sensor
Type BME280
Temperature range -40°F to 185°F (-40°C to 85°C)
Pressure range 300 to 1100 hPa
Humidity Response time (τ63%): 1 s
Accuracy tolerance: ±3% RH
Hysteresis: ≤2% RH