Thirdreality
Thirdreality Smart CO2 Sensor
$60
Thirdreality Smart CO2 Sensor Overview
The Thirdreality Smart CO2 Sensor is a budget CO2 monitor that tracks CO2, Temperature and Humidity. It uses a NDIR sensor — the technology we recommend for reliable CO2 readings — with a stated accuracy of ±75 ppm across a 400-5000 ppm measurement range. At $60, it is aimed at smart home setups, budget-conscious buyers and home use.
In day-to-day use, the Smart CO2 Sensor offers no built-in display — readings are accessed through a connected app or dashboard, plus Zigbee connectivity for logging trends and setting alerts, plus a stationary design (USB powered) best suited to continuous monitoring in a fixed location.
Best For
Full Specifications
| Price | $60 |
| Sensors | CO2, Temperature, Humidity |
| Sensor Type | NDIR |
| Connectivity | Zigbee |
| Display | No |
| Portable | No |
| Battery Life | USB powered |
| CO2 Accuracy | ±75 ppm |
| CO2 Range | 400-5000 ppm |
Pros & Cons
Pros
- ✓True NDIR CO2 sensor (not an eCO2 estimate)
- ✓Accessible price point for a real CO2 sensor
Cons
- ✗No onboard display — requires the app to check readings
- ✗No wireless connectivity for logging or alerts
- ✗Not designed for portable use
Compare this monitor with others using our Monitor Comparison Tool
Frequently Asked Questions
Is the Thirdreality Smart CO2 Sensor accurate?+
The Thirdreality Smart CO2 Sensor uses a NDIR sensor with a stated accuracy of ±75 ppm over a range of 400-5000 ppm. NDIR is the proven reference technology for consumer CO2 monitoring.
What does the Thirdreality Smart CO2 Sensor measure?+
It measures CO2, Temperature, Humidity. CO2 is the key metric for judging ventilation — levels below 800 ppm indicate well-ventilated air.
Does the Thirdreality Smart CO2 Sensor need WiFi?+
No. The Thirdreality Smart CO2 Sensor works standalone.
Is the Thirdreality Smart CO2 Sensor worth it in 2026?+
At $60, the Thirdreality Smart CO2 Sensor is a solid choice for smart home setups, budget-conscious buyers and home use. Its NDIR sensor puts it ahead of cheaper eCO2 estimators. Compare alternatives in our monitor comparison tool before buying.