STC31
NRNDCO₂ accuracy of ±(0.5 vol% + 3% MV) @0-100 vol%
<p>The STC31 is a chip-sized gas concentration sensor for high range, accurate CO₂measurements designed for high-volume production. The sensor is based on a revolutionized thermal conductivity measurement principle, which results in superior repeatability and long-term stability. This makes the STC31 the perfect choice for applications where reliability is key. Thermal conductivity technology has an ultra-low power consumption, even compared to low-power optical sensor. This makes it the ideal choice for battery operated applications, delivering top-performance at an absolute minimal power budget. The STC31 features a digital I²C interface, which makes it easy to connect directly to a microprocessor. The outstanding performance of these sensors is based on Sensirion’s patented CMOSens® Technology, which combines the sensor element, signal processing and digital calibration on a small CMOS chip. The well-proven CMOS technology is perfectly suited for high-quality mass production and is the ideal choice for demanding and cost-sensitive OEM applications.</p>
Specification
| CO₂ | |||
|---|---|---|---|
| Measurement range
0 - 100
| 0 - 100 | vol% | |
| Accuracy: Baseline
±0.5
| ±0.5 | vol% | |
| Accuracy: Linearity
±3.0%MV
| ±3.0%MV | vol% | |
| Response time (τ63%)
< 2
| < 2 | s | |
| Temperature stability
0.025
| 0.025 | vol% / °C |
| Generic | |||
|---|---|---|---|
| Supply voltage
2.7 - 5.5
| 2.7 - 5.5 | V | |
| Average supply current
50
| 50 | uA | |
| Max. supply current
5000
| 5000 | uA | |
| Interfaces
I²C
| I²C | ||
| Size (LxWxH)
3.5 x 3 x 1
| 3.5 x 3 x 1 | mm³ |
Downloads
Sensor evaluation
Buy the following products to evaluate this sensor
| Name | Description | Series | Category |
|---|---|---|---|
 SEK-SensorBridge | Connecting bridge with two sensor ports | SEK-SensorBridge | |
 SEK-STC31 | CO₂ evaluation kit STC31 | SEK-STC31 | CO₂ |
Download the respective viewer software to start measuring
Go to download centerStart testing our sensors fast and easy with the evaluation kits
How to get startedLatest CO₂ sensors
STCC4
CO₂ sensor with unmatched form factor for indoor air quality applications
- Sensor
- CO₂
SEK-STC31-C
CO₂ evaluation kit STC31-C
- Evaluation kit
- CO₂
STC31-C
CO₂ accuracy of ±(0.2 - 2.0 vol%) @0-100 vol%
- Sensor
- CO₂
SCD41
High CO₂ accuracy with extended measurement range and low power modes
- Sensor
- CO₂
SCD4x CO₂ Gadget
SCD4x CO₂ Sensor Demonstrator
- Reference design
- CO₂
SEK-SCD30
CO₂ Evaluation kit SCD30
- Evaluation kit
- CO₂
SEK-SCD41
CO₂ evaluation kit SCD4x series
- Evaluation kit
- CO₂
Smart sensors for your application
Sensirion's sensor solutions are used in a wide range of applications and markets. Our reliable environmental and flow sensors improve energy efficiency, increase health and ensure safety and comfort.