State of the Art
Air Quality Egg
The Air Quality Egg is a sensor system designed to allow anyone to collect very high resolution readings of NO2 and CO concentrations outside of their home. These two gases are the most indicative elements related to urban air pollution that are sense-able by inexpensive, DIY sensors
The Air Quality Egg is developed by a community effort, born out of groups from the Internet of Things Meetups in NYC and Amsterdam and New York City. They are designers, technologists, developers, architects, students, and artists.
The product development conversation, as well as a fair bit of the philosophical arguments, happens in our Google Group. They also have a Wiki.
How It Works
1) Indoor or outdoor sensors: A small electronic sensing system plugs into a USB 'wall wart', and sends the data over Wi-Fi.
2) Data sent to the internet:The data is sent to the cloud at Opensensors.io, an open data service, which both stores and provides free access to the data.
3) Visualization:From there, it is sent to the this website, and to Xively, where you can see graphs and other visualizations of the data. The service includes embeddable graphs and the ability to generate triggers for tweets and SMS alerts (it looks something like this), as well as a robust API which allows for developers in the community to unlock the potential of this new dataset by building mashups, maps, and applications.
Foobot is mainly focusing on preventing respiratory issues, fighting germs and increasing productivity.
Aclima’s system is fully integrated—end-to-end—from hardware to software. Aclima Nodes can support a tailored suite of sensors, deployed both indoors and outdoors, ranging from basic comfort parameters to complex gases and particulate matter. Data from tens or thousands of networked Nodes stream to the internet in real time. This information is analyzed and visualized with Aclima’s suite of tools, allowing for deep understanding of environmental performance at any resolution.
Today, Aclima's networks measure a broad and growing spectrum of variables, including: Temperature/Humidity, Noise (dB), Light (LUX), Vibration (Hz), Atmospheric Pressure, Carbon Dioxide (CO2), Ozone (O3), Carbon Monoxide (CO), Nitrogen Dioxide (NO2), Particulate Matter (PM), Volatile Organic Compounds (VOCs), Nitric Oxide (NO), Sulfur Dioxide (SO2), Methane (CH4).
Aircuity's patented system takes samples of air remotely throughout a facility and routes them to a centralized suite of sensors. By measuring critical indoor environmental parameters, it can provide intelligent input to building ventilation systems for energy efficiency and high quality indoor environmental quality. Aircuity has produced multiple products targeted at business use or industrial use. The most popular product is SST750 Sensor Suite:
• Multi-parameter sensing.
• Exceptional accuracy and repeatability for single-ended and reference-based measurements.
• Calibration and maintenance of sensors is automatically and routinely scheduled through Aircuity’s calibration depot and Assurance Services program.
• Adaptable and scalable to grow with a facility.
• Alternating LimbTM sampling functionality.
Architecture: Capture, Sense, and Control
Aircuity can capture air samples from specific rooms or from air supply ducts, and it routes these air samples to a centralized suite of sensors in a manner similar to how data packets are routed through a data network. Utilizing a single set of high quality sensors increases the accuracy of the measurements needed and significantly lowers the life cycle costs of maintaining system calibration. The sensor analysis is then used to inform building ventilation controls to optimize ventilation rates based on what is actually going on in the environment.
Solving the Issues of Remote Sensors
Aircuity’s use of centralized sensors solves many of the issues related to traditional sensing systems. By analyzing air samples with a single sensor a true differential measurement is created that vastly improves the accuracy of the system. By significantly reducing the number of sensors needed, higher quality sensors can be deployed to measure more critical parameters. Life cycle costs are also reduced as Aircuity can cost-effectively provide scheduled calibration service, ensuring system accuracy and effectiveness year after year.