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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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With the PA-I-Indoor’s full-color LED, the resulting glow indicates air quality at a glance from across the room. Sporting a simple design that sits comfortably on a counter or tabletop, the PA-I-Indoor measures real-time PM2.5 concentrations. Built-in WiFi enables the sensor to transmit data to the PurpleAir map, where it is stored and made available to any smart device.

Dimensions 4.25 in x 3 in x 2.25 in
(108 mm x 67 mm x 57 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 4.25 in x 3 in x 2.25 in
(108 mm x 67 mm x 57 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, 1.5A
A/C output 5V DC, 3A
Sensor input 5V DC, 0.18A continuous, 600mA peak
Weather resistance Indoor use only
Plug type 2 Pins, Type A (USA)
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 2 dBi on-board PCB antenna
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