Connector-side view of the white VisiblAir Model O with Québec and Canada provenance marks
Three-quarter top view of the white VisiblAir Model O

Model O Wi-Fi and Ethernet Air Quality Sensor

Monitor CO2, PM2.5, VOC, NOx, barometric pressure, temperature, and humidity over 2.4 GHz Wi-Fi or wired Ethernet. Power Model O by USB-C or add optional PoE.

Engineered, assembled and tested in Québec, Canada.Prepared to order and shipped from Canada to customers in Canada, the United States, and worldwide.

Experience Comprehensive Air Quality Monitoring with VisiblAir Model O (2026 Edition)

Elevate your indoor environment with the VisiblAir Model O—the ultimate air quality monitoring solution designed for homes, offices, and schools. This advanced multi-sensor monitor provides measurements of CO₂, particulate matter (PM), volatile organic compounds (VOC), nitrogen oxides (NOx Index), temperature, humidity, and barometric pressure, ensuring a complete picture of your air quality.

Choose 2.4 GHz Wi-Fi or wired Ethernet for network connectivity. Power Model O separately by USB-C, or select optional Power over Ethernet (PoE) to carry power and data over one Ethernet cable. Either network option syncs readings to the cloud portal for remote monitoring and historical analysis.

Free Cloud Access for Up to 10 Devices. Manage and monitor up to 10 sensors under a single account at no cost! Perfect for multi-room setups in homes, offices, or educational institutions.

See how the VisiblAir Cloud Portal works

Note: Cloud portal access for additional sensors beyond 10 are available for a nominal fee of $5 CAD per month or $50 CAD per year plus applicable taxes per sensor.

Planning a fixed deployment? See the office and building guide or school guide for Ethernet, PoE, placement and multi-room guidance.

$289.00 CAD

Ready to order

  • Availability: Orders ship within 3–5 business days following receipt of the order.
  • Shipping: Ships worldwide from Canada; cost is calculated at checkout. Duties and import taxes are the buyer's responsibility.
  • Warranty and returns: 12-month warranty. Return and refund requests may be made within 30 days of payment, subject to the return conditions.
  • Cloud: Portal access is free for up to 10 sensors. Each additional sensor is $5 CAD/month or $50 CAD/year, plus tax.
  • Connectivity: Choose 2.4 GHz Wi-Fi or wired Ethernet.
  • Power: Use USB-C or add optional PoE. Regional USB-C chargers or no charger are available.

School, office, or multiple units? Request a quote.

Specifications

  • Dimensions: 138mm x 139mm x 33mm
  • Construction: White and black PETG with wood insert
  • CO₂ Sensor: Sensirion SCD-30
  • CO₂ Range: 0 to 10,000 ppm
  • CO₂ Accuracy: ±30 ppm + 3% MV (at 25 °C, 400 to 10,000 ppm)
  • Particulate Matter Sensor: Sensirion SEN-55
  • PM Ranges: PM1.0, PM2.5, PM4.0, PM10 (PM4.0 and PM10 interpolated)
  • PM Accuracy: ±10 µg/m³ (0-100 µg/m³), ±10% (100-1000 µg/m³)
  • VOC Sensor: Sensirion SEN-55
  • VOC Range: VOC index 0 to 500
  • VOC Accuracy: ±5 VOC Index points
  • NOx Sensor: Sensirion SEN-55
  • NOx Range: Sensirion NOx Index 0 to 500
  • NOx Accuracy: ±5 NOx Index points
  • Barometric Pressure Sensor: Integrated
  • Connectivity: 2.4 GHz Wi-Fi or wired Ethernet
  • Power: USB-C or optional PoE
  • Temperature Range: -40 °C to 70 °C
  • Temperature Accuracy: ±(0.4 °C + 0.023 x (T [°C] - 25 °C))
  • Humidity Range: 0% to 100% RH
  • Humidity Accuracy: ±3% RH
  • Operating Temperature: 0 °C to 60 °C

Documents

Quick Setup Guide

Download the quick setup guide for your Model O v2 / 2026 sensor.

Download Model O v2 Quick Setup Guide (PDF)

Firmware Changelog

Review firmware releases, fixes, and improvements for Model O v2 / 2026.

Customer Reviews

The response from the time ordered to receiving the email invoice was in seconds. The hands on calibration to shipping and operation were easily spelled out and added appreciation or understanding that visiblair is serious in what they do and the products they market. In a climate crisis and seemingly never ending wild fires, having this tool is very much in the realm of a life saver. I am ecstatic to have this security inside and out.

by J.R. · Model O and Model X2 customer

Compare with Other Models

See when Model O is the best fit versus portable, battery-powered, and outdoor VisiblAir monitors.

Compare Models

VOC / TVOC Guidance

Review how VOC index readings should be interpreted indoors and when ventilation should be improved.

Read the VOC Guide

CO2 Calibration Help

Review the recommended calibration check interval and outdoor reference range for CO2 sensors.

See Calibration Steps

Model O vs AirGradient ONE

Compare sensing, Ethernet and PoE, cloud retention, local access, display, repairability and Canadian pricing.

Read the Comparison