How much is a purple air sensor?

How much does a PurpleAir monitor cost?

The PurpleAir is a small, inexpensive device for monitoring atmospheric concentrations of particulate matter. While state-of-the-art monitors approved by EPA to monitor particulate concentrations for compliance with national air quality standards can cost $10,000 and up, the PurpleAir costs around $260.

Are PurpleAir sensors worth it?

The PurpleAir PA-II sensor is very reliable. Three years ago we deployed 25 sensors throughout our region and they are all still running strong with high confidence. I ordered a sensor last year to get accurate air quality readings in my neighborhood. … The PurpleAir PA-II sensor is very reliable.

How many PurpleAir sensors are there?

Purple Air has two sensors, which are both graphed on the timeseries. If the sensors are reading differently, very low, or very high, then one or both may be broken. You can see current air quality data on our website.

What is a PurpleAir sensor?

PurpleAir sensors are an “Internet of things” (IOT) air quality sensor or particulate sensor consisting of a network of elements. Laser Particle Counter: PurpleAir uses PMS5003 and PMS1003 laser particle counters. These sensors count suspended particles in sizes of 0.3, 0.5, 1.0, 2.5, 5.0, and 10um.

How much is an air quality sensor?

PurpleAir’s sensors cost less than $280 dollars — not exactly cheap, but still well below what someone would probably pay for a new smartphone. Compared to the heavy-duty equipment that researchers typically use to measure air quality, it’s a steal — those models can cost up to $50,000.

How reliable is purple air?

For the national data set of sensors collocated with regulatory-grade monitors, results show that PurpleAir sensors, when corrected, accurately report NowCast AQI categories 90% of the time as opposed to uncorrected PurpleAir data, which are accurate only 75% of the time.

How long do PurpleAir sensors last?

The sensor is yours to keep! We ask that the sensor be installed for at least two years but we would appreciate it if you could keep the sensor plugged in for as long as possible.

Is PurpleAir app free?

Although PurpleAir currently does not have an app, there is a free iOS app called Local Haze which supports PurpleAir’s monitors. The app detects the nearest sensor to you and displays some basic data for the PM2. 5 concentration in real-time.

What AQI is unhealthy?

An AQI over 150 is considered unhealthy for the general population. AQI over 101 can be unhealthy for sensitive groups and some workers with asthma and other conditions may feel unhealthy when the AQI is below 150.

How do I reset my purple air sensor?

There is not a button to reset the WiFi network connection. To make the sensor network, AirMonitor_xxxx, visible again you will need to turn off the WiFi network or take the sensor out of range of the WiFi network the sensor is currently configured to.

Is purple air more accurate than air now?

Broadly put, PurpleAir provides more localized, more current and less accurate readings than AirNow.

What is best site for air quality?

There are a lot of websites that offer a similar set of features without installing anything. Two you should try are BreezoMeter and Aqicn. Both of them provide largely accurate results. As it turns out, Aqicn actually stems from a social enterprise project called The World Air Quality Index Project.

How do AQI sensors work?

Optical particle counters detect particulate pollution by measuring the light scattered by particles. Optical sensors detect gases like carbon monoxide and carbon dioxide by measuring the absorption of infrared light.

Why is purple air different than AirNow?

Why does the AirNow Fire and Smoke Map look different than the PurpleAir Map? … AirNow identifies potentially malfunctioning sensors based on a comparison of readings from the two fine particle sensors each PurpleAIr sensor contains, or from user reports.

What is the best air quality app?