Sensirion
Sensirion SCD41 Eval Kit
$60
Sensirion SCD41 Eval Kit Overview
The Sensirion SCD41 Eval Kit is a budget CO2 monitor that tracks CO2, Temperature and Humidity. It uses a Photoacoustic sensor — the technology we recommend for reliable CO2 readings — with a stated accuracy of ±40 ppm across a 400-5000 ppm measurement range. At $60, it is aimed at DIY projects and professional applications.
In day-to-day use, the SCD41 Eval Kit offers no built-in display — readings are accessed through a connected app or dashboard, plus USB and I2C 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 | Photoacoustic |
| Connectivity | USB, I2C |
| Display | No |
| Portable | No |
| Battery Life | USB powered |
| CO2 Accuracy | ±40 ppm |
| CO2 Range | 400-5000 ppm |
Pros & Cons
Pros
- ✓True Photoacoustic 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
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Frequently Asked Questions
Is the Sensirion SCD41 Eval Kit accurate?+
The Sensirion SCD41 Eval Kit uses a Photoacoustic sensor with a stated accuracy of ±40 ppm over a range of 400-5000 ppm.
What does the Sensirion SCD41 Eval Kit measure?+
It measures CO2, Temperature, Humidity. CO2 is the key metric for judging ventilation — levels below 800 ppm indicate well-ventilated air.
Does the Sensirion SCD41 Eval Kit need WiFi?+
No. The Sensirion SCD41 Eval Kit works standalone.
Is the Sensirion SCD41 Eval Kit worth it in 2026?+
At $60, the Sensirion SCD41 Eval Kit is a solid choice for DIY projects and professional applications. Its Photoacoustic sensor puts it ahead of cheaper eCO2 estimators. Compare alternatives in our monitor comparison tool before buying.