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Regular price $41.99 USD
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❥❥Know Your Air: this sensor measures PM2.5 concentration in the air(with high quality Honeywell HPM Series Particle Sensor) and allows you to take timely measures to keep the air quality within safe levels[Accessory Only, Can Not Be Used Alone]

❥❥Live Data on APP: works with GW1000 WIFI gateway(sold separately), after the WIFI configuration,the current PM2.5 concentration / real-time and 24 hours average AQI / air quality levels indicator(Good, Moderate, Poor, Unhealthy, Severe and Hazardous)can be viewed directly on the WS View App

❥❥Graph & History Records on the Website: supported to upload to our free Ecowitt Weather server( to view the PM2.5 and AQI data graph and download the history records on the website; it's recommended to add a shortcut of the website on the home screen of your phone for quick access

❥❥Support Monitoring Multi Locations: The GW1000 Gateway(sold separately) supports MAX 4 WH43 PM2.5 Air Quality Sensors. Note: This sensor will share the 4 channels with WH41

❥❥Indoor Air Quality Detector: powered by USB connection(USB cable included), suitable to use at home, office and lab; monitor the air quality to be away from harmful of PM2.5

❥❥Also works with HP2551/HP3500/HP3501 weather stations


✩PM2.5 fine particulate matters( 2.5 micrometers in diameter or smaller) which come from power plants/ industrial processes/ vehicle tailpipes/ wood stoves and even wildfires, it impacts your health and can cause respiratory issues such as allergies/asthma/ COPD/ lung cancer etc.

✩ECOWITT PM2.5 Air Quality Sensor measures PM2.5 concentration in the air. The data can be streamed by GW1000 Wi-Fi Gateway(sold separately) and can be viewed on our WS View mobile application after the Wi-Fi configuration done, allowing you to know the air quality and take corresponding measures to reduce the loss.


1)View PM 2.5 current concentration on our free WS View APP after the WIFI configuration(needs to work with GW1000 WIFI gateway - sold separately).

2)View Real-time / 24H average AQI / 6 grades AQI indicator: Good, Moderate, Poor, Unhealthy, Severe and Hazardous

3)The GW1000 Gateway(sold separately) supports MAX 4 WH41 PM2.5 Air Quality Sensors. Note: Please download the latest WS View App and update the firmware to V1.4.6 to add multi-channels sensors; each new sensor will be recognized as a new channel according to the Power-on sequence.And please don't forget to attach a label of the channel on each sensor for distinction.

4)For indoor use only.


Line of sight wireless transmission (in open air): 300feet(100meters)

Update Rate: 1 minute when powered by USB connection; 10 minutes when powered by 2 X AA batteries(not included)

Measure rang: 0~999ug/m3

Accuracy(at 25°C ±5°C):>100ug/m3, ±15%;<100ug/m3, ±15ug/m3; Resolution: 1ug/m3


1.Works with WH0290 Air Quality Monitor Console(sold separately and need to be at the same frequency).

2.The sensor is sensitive to liquid droplets - rain/fog/sprinkling. When the Dew Point is close to the outdoor temperature(T - D < = 2C), the PM2.5 reading will be very high(which is not the real condition). If mind, please don't purchase.

Package List:

1x PM2.5 Sensor(No display)

1x USB Cable

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