STC31

CO₂ accuracy of ±(0.5 vol% + 3% MV) @0-100 vol%

Specification

CO₂
Accuracy
±0.5
vol%
Measurement range
0 - 100
vol%
Response time (τ63%)
< 2
s
Temperature stability
0.025
vol% / °C
Generic
Supply voltage
2.7 - 5.5
V
Average supply current
50
uA
Max. supply current
5000
uA
Interfaces
I²C
Package size (LxWxH)
3.5 x 3 x 1
mm³

Technical downloads

Name
Type
Date
File
Size
Datasheet STC31
Datasheet
10/2020
PDF
897.1 KB
Field calibration STC31
Application note
08/2020
PDF
328.5 KB
Handling and assembly guide STC31
User guide
08/2020
PDF
283.5 KB
RoHS, REACH and Hal-Free declaration STC3x
Certificate
07/2022
PDF
89.2 KB
Indoor air quality brochure
Flyer
10/2021
PDF
7.7 MB

Buy the following products to evaluate this sensor

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.

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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.