Category: Air Quality Monitor

AirSpot Review: The Wearable CO2 Monitor That Delivers Real-Time Clarity

Sotirios Papathanasiou1 Comment

The world of air quality monitoring has long been dominated by bulky, desk-bound units. The AirSpot, a revolutionary small CO2 monitor, shatters that paradigm. Given to me by the CEO of The Safer Air Project, this device is not just a monitor—it’s a truly wearable environmental sensor that brings crucial air quality data right to your wrist or backpack.

Design, Portability, and Hardware

The AirSpot’s most immediate selling point is its diminutive size and featherlight weight. Measuring a mere 3.6cm x 4.8cm x 1.15cm and weighing only 17g (0.6 ounces), it is, to my recollection, the smallest CO2 monitor currently available. This size isn’t just a gimmick; it’s the foundation of its usability.

The device’s true genius lies in its ecosystem of accessories. AirSpot is unique in offering a wide range of mounting options, including a wristband that makes it genuinely wearable. I personally prefer the carabiner-style key ring case, which allowed me to easily clip it onto my backpack or belt—perfect for on-the-go monitoring.

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Review: AirGradient Open Air

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Having had the opportunity to get the AirGradient Open Air (Model O-1PST) at the ASIC 2025 conference in Thailand, complete with its unique engraving, I’ve spent some time with this device, and it’s clear that AirGradient is pushing the boundaries of accessible and reliable outdoor air quality monitoring. This device presents a compelling alternative to existing solutions, particularly for those seeking transparency and robust performance.

Technical Specifications O-1PST

  • WiFi 2.4GHz IEEE 802.11 b/g/n-compliant
  • Bluetooth LE: Bluetooth 5, Bluetooth mesh
  • Status LED
  • Plantower PMS5003T for PM2.5 + ENS210 for T/RH
  • SenseAir S8/S88 CO2 NDIR Sensor
  • Sensirion SGP41 TVOC/NOX Module
  • Enclosure: ASA Plastic, UV Resistant and Weather Proof
  • Mounting Options: Wall or pole mounting options
  • 4m USB-C to USB-A Cable
  • USB-C Power Connector 2A/5V
  • Certifications: CE, RoHS, REACH, FCC

Sensor Selection: A Thoughtful Approach

The Open Air features a well-considered suite of sensors designed for accurate and insightful data. For PM2.5 measurements, it utilizes the Plantower PMS5003T, a sensor known for its reliability and found in other popular monitors like the PurpleAir (though it’s important to note the PMS5003T is a similar but not identical variant).

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aranet: Comprehensive Environmental Monitoring for a Healthier Home

Sotirios Papathanasiou1 Comment

In an era where indoor air quality and environmental safety are of a high importance, aranet has emerged as one of the leaders in providing reliable and intuitive monitoring solutions. See The Air has thoroughly reviewed several of aranet’s innovative products, each designed to empower individuals with crucial insights into their living spaces. From carbon dioxide levels to radon gas and even radiation, aranet offers peace of mind through precise and accessible data.

Most aranet monitors stand out by providing a holistic view of your environment, often including temperature, relative humidity, and atmospheric pressure alongside their primary measurements. This multi-parameter approach helps users understand the interplay of various factors affecting their indoor comfort and health.

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Latvia’s Model for Healthy Learning: The MESH Air Quality Project

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Latvia has successfully deployed 14,000 CO2 monitors in hundreds of schools, ensuring safer and healthier learning environments for students and teachers. This nationwide initiative, launched by the Ministry of Education and Science of Latvia and implemented by the technology company MESH, addresses concerns about elevated CO₂ levels, which can contribute to the transmission of pathogens and affect concentration. Such successful projects should serve as a blueprint for others aiming to improve indoor air quality and efficiency in public buildings. The data collected from these monitors is freely accessible to the public via the website https://co2.mesh.lv/home/dashboard, providing transparency and peace of mind for parents.

The project, which involved an initial investment of €3.58M, translates to an approximate cost of 12 euros per student. This cost-effective solution was designed to significantly improve cognitive abilities and health, as well as air quality, for 300,000 children across Latvian schools. Even without adding heating control, facility managers were able to optimize energy use by simply analyzing temperature trends available online – leading to smarter manual adjustments and early savings in several municipalities. Following the project, some municipalities further developed the system by integrating automatic regulation of heat nodes, and in one case, the investment was fully recouped within a single heating season.

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Review: aranet Radiation ☢️

Sotirios Papathanasiou1 Comment

The aranet Radiation tackles a whole new frontier: personal radiation safety. This device promises to empower you by monitoring gamma (γ), beta (β), and x-ray levels, giving you insights into your environment’s radiation for years.

Pros:

  • Peace of Mind: Being aware of radiation levels can be a major stress reliever, especially in areas where radiation concerns might exist like near nuclear power plants.
  • Long-Term Tracking: With a two-year data tracking capability, the Aranet Radiation allows you to identify trends and build a picture of your overall radiation exposure.
  • Battery Life: Aranet devices are known for their impressive battery life, and the Radiation model is likely to follow suit.
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Review: InBiot Mica Plus – A Comprehensive IAQ Solution for Green Buildings and Beyond

Sotirios Papathanasiou1 Comment

The inBiot Mica Plus is a robust indoor air quality monitor designed squarely for the B2B market, catering specifically to buildings aiming for top-tier Indoor Environmental Quality (IEQ) and compliance with stringent green building certifications like WELL, RESET, and LEED. With a promised 10-year lifespan and minimal maintenance thanks to automatic calibration, the Mica Plus is a compelling long-term investment.

Equipped with a comprehensive sensor suite including Temperature, Relative Humidity, CO₂, TVOC, Particulate Matter, and Formaldehyde, the Mica Plus provides a detailed picture of indoor air conditions. Its connectivity options are equally impressive, spanning basic Wi-Fi to advanced protocols like Power over Ethernet (PoE), LoRaWAN, Sigfox, NB-IoT/LTE-M, and local communication options such as Modbus RTU/TCP/IP, API, BACnet, and MQTT, ensuring seamless integration into existing building management systems.

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Review: µCritAir Development Kit – Gamifying Our Way to Better Indoor Air

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For years, I’ve been advocating for the integration of gamification into everyday tools to drive meaningful behavioral change, especially concerning something as vital yet often invisible as indoor air quality. We need engaging ways to keep people motivated to understand and improve their environments. So, when I encountered the µCritAir (it actually found me), I was immediately intrigued. This isn’t just another air quality monitor; it’s an experiment in engagement, using a digital pet – a µCritter – whose health depends directly on the air you breathe. Keep your air clean, and your critter thrives. Let it worsen, and its health suffers. It’s a compelling, tangible connection between data and consequence.

Development Kit

It’s important to set expectations correctly: the µCritAir is currently available as a Development Kit. This isn’t a polished, mass-market product yet. Instead, it’s aimed squarely at enthusiasts, early adopters, and tinkerers who enjoy being part of the development journey. Yes, this means you’ll encounter some unpolished aspects, perhaps a bug here or there, or features still under active development. However, this is also its strength for the right audience. The team behind µCritAir is clearly passionate and actively working on both software and hardware improvements. They genuinely value the feedback from their early users, creating a collaborative dynamic that’s exciting to be a part of.

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Review: aranetRn+ – A Deep Dive into Radon Awareness

Sotirios Papathanasiou4 Comments

Impact-Site-Verification: 38646f42-1d76-4186-a86f-324bc14aa675

Aranet has carved a niche for itself in the air quality monitoring space, establishing a distinct design language that prioritizes clarity and functionality. The aranet4, their popular CO2 monitor, set the stage with its minimalist aesthetic and intuitive e-ink display. The aranetRn+ builds upon this foundation, tackling the complex issue of radon monitoring while staying true to aranet’s core principles.

The aranetRn+ maintains the familiar clean lines and robust build quality associated with aranet products. However, the nature of radon detection necessitates a deeper profile. The device houses a α-decay event detection using ionization chamber, which contributes to its increased depth. While slightly bulkier, the aranetRn+ remains a discreet and unobtrusive addition to any home.

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The Future of Air Quality Monitoring: Portable Power

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Years ago, I explored the potential of gamification to enhance public engagement with air quality. Now, numerous projects are emerging, promising to deliver user-friendly products that bridge the knowledge gap. Two key players are driving this innovation: sensor manufacturers, who are relentlessly miniaturizing their technology, and startups, which are pioneering innovative solutions to bring these sensors directly to consumers.

Air quality monitoring is no longer a niche concern for environmental scientists. With growing awareness of the impact of air pollution on health, a new wave of portable air quality monitors is poised to revolutionize how we perceive and manage the air we breathe.

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Review: M5Stack K131 AirQ – All in One Portable Air Quality Monitor

Sotirios Papathanasiou2 Comments

The M5Stack K131 AirQ is an all-in-one air quality monitor designed for easy and comprehensive monitoring of your environment. It is a portable air quality monitor and an ideal companion for those who want to track their exposure to environmental pollutants.

Characteristics

Pros:

  • Multi-sensor: It goes beyond basic temperature and humidity readings, offering detailed readings on PM1.0,PM2.5, PM4, PM10 particles, VOCs, NO2, and CO2 concentration. This gives you a holistic view of your air quality.
  • E-ink display: The easy-to-read e-ink display provides clear visuals of the monitored metrics, even in low light conditions. Even in a power outage, the last screen will still be visible.
  • Versatile mounting: LEGO mounting holes, magnets, and detachable hanging ears offer various installation options for different environments.
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