PurpleAir Touch Indoor Air Quality Monitor
PurpleAir Touch Indoor Air Quality Monitor
PurpleAir Touch Indoor Air Quality Monitor
PurpleAir Touch Indoor Air Quality Monitor
PurpleAir Touch Indoor Air Quality Monitor
PurpleAir Touch Indoor Air Quality Monitor
PurpleAir Touch Indoor Air Quality Monitor

PurpleAir Touch Indoor Air Quality Monitor

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The PurpleAir Touch indoor air quality monitor’s built-in WiFi integration will let you check your air quality through the real-time PurpleAir Map – from anywhere in the world. Double tap to adjust the brightness of the highly visible multi-colored LED ring, allowing quick air quality identification from across the room. Uncluttered and attractive, the PurpleAir indoor monitor comes with a white USB cable and provides you and your family with industry-leading performance in measuring PM2.5 pollutant levels in your home.

Please note, this sensor does not come with a power adaptor. You may use your own USB power source (any 5V, 1.2 to 2.4 amp adaptor will work) or find one here.

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  • New Generation PurpleAir indoor particulate sensor with multi-colored LED ring
  • Tap sensor for adjusting LED brightness, double tap the sensor to adjust LED brightness.
  • Single Laser Particle Counter (PMS-1003)
  • Pressure, Temperature, Humidity & Gas Sensor (BME688)
  • WiFi connectivity with data stored in the cloud
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 US EPA AQI multi-colored LED ring
Power requirements 5V USB Micro, 0.18A continuous, 600mA peak
Power cord length 3.2ft (1m) USB (Type A)
Intended Use Indoor use only
WiFi Yes
Expansion Port Yes
Internal Storage No
Warranty One (1) year limited warranty
Tap sensor for adjusting LED brightness, double tap the sensor to adjust LED brightness.
Manufacturer Kionix, Inc.
Model Number KX122-1037
Temperature range -40°F to 185°F (-40°C to 85°C)
Mechanical Shock (powered and unpowered) 5,000g for 0.5ms
10,000g for 0.2ms
Laser Particle Counters

Class 1 Laser. A Class 1 laser is safe under all conditions of normal use.

Manufacturer Plantower
Type PMS-1003
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 liter
Single response time ≤1 second
Total response time ≤10 seconds
Pressure, Temperature, Humidity, & Gas Sensor
Manufacturer BOSCH
Model Number BME688
Temperature range -40°F to 185°F (-40°C to 85°C)
Pressure range 300 to 1100 hPa
Humidity Response time (τ63%): 8s
Accuracy tolerance: ±3% RH
Hysteresis: ≤1.5% RH
Gas Response time (τ33-63%): <1s
Resolution: ±0.08%

Contains Transmitter Module FCC ID: 2AC7Z-ESPWROOM02D

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

FCC Compliance Statement (Part 15.19)

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:

  1. This device may not cause harmful interference, and
  2. This device must accept any interference received, including interference that may cause undesired operation.

Warning (Part 15.21)

Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.

FCC Interference Statement (Part 15.105 (b))

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of the following measures:

  • Reorient or relocate the receiving antenna.
  • Increase the separation between the equipment and receiver.
  • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
  • Consult the dealer or an experienced radio/TV technician for help.

To comply with FCC/IC RF exposure limits for general population / uncontrolled exposure, the antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co-located or operating in conjunction with any other antenna or transmitter.

Customer Reviews

Based on 46 reviews
Romel Wrenn
Color distinction.

Will the indoor monitor change color if very poor humidity only.
My AirThings indoor shows good AQI with poor humidity. My purpleair indoor monitor is red despite good outdoor AQI.

Hi Romel,

The PurpleAir Touch will only change colors according to the US EPA PM2.5 AQI. No other type of data, including humidity, will affect the sensor's lights. If the device continues to report poor air quality when you think it is not, we would be happy to help you troubleshoot. To start troubleshooting, please send an email to contact@purpleair.com.

Monitor shows wrong place on MAP. Can't be sure if it is my monitor

Can't be sure if it is my monitor

Hi Gerald,

The position of sensors on the map is set during the registration process. If you are unsure where you monitor is, please send an email to contact@purpleair.com and we can assist!

Bruce King
Have not yet completed hook up

Will advise once I have had time to hook it up thanks

Mariusz Pagowski
Like the sensor, support, and community

I only purchased it about two weeks ago but so far very happy with it. Also, unlike with purely commercial manufacturers there is great community to get answers and learn and someone will pick up the phone when support is needed.

My initial impressions

I like the idiot color indicator's that gives a rough idea of the air quality. I can always look at the web portal for en exact AQI level. USB cord is short, so I purchased a USB extension (might be a good option to have available on website). WIFI signal weak, I had to move several times to get a decent signal strength (my other devices have no issues). Lastly, my device shows grayed out a lot. I have to set conversion to “no” so that it shows zero instead of being grayed out. The annotation says check WIFI, it’s good. After reading on the community board, I believe it’s a PurpleAir issue that needs to be fixed, looks like it’s been lingering for awhile.

I’m still glad, I purchased it. Customer support has been first rate.

Hi Duane,

I know we've corresponded in other areas. But I want to let others know here that the offline sensor is a bug affecting the US EPA conversion on our map. It will be fixed in the next map version.