Swiss Sensirion thermal conductivity CO2 sensor CO2 sensor - STC31

Swiss Sensirion thermal conductivity CO2 sensor CO2 sensor STC31 description:

STC31 is a chip-sized gas concentration sensor that accurately measures CO2 over a wide range and is designed for high-volume production applications.

Based on revolutionary thermal conductivity principle, this sensor offers excellent repeatability and long-term stability, making it ideal for applications with high reliability requirements. Compared to low-power optical sensors, thermal conductivity technology also achieves ultra-low power consumption. Therefore, it provides the best performance with minimal power budget, making it very suitable for battery-powered applications.

The sensor's digital I2C interface easily connects to microprocessors. Its excellent performance is based on Sensirion's patented CMOSens® technology, which integrates the sensor element, signal processing, and digital calibration on a small CMOS chip. Proven CMOS technology is ideal for high-quality mass production and demanding, cost-sensitive OEM applications.

Swiss Sensirion thermal conductivity CO2 sensor CO2 sensor STC31 advantages:

Technology	Advantages
CMOSens® technology designed for mass production	Ultra-high cost-effectiveness scales with volume to support high-volume applications
CMOSens® technology designed for mass production	Proven quality
Robust and durable with no drift over lifetime	Stable sensor signal output throughout product life
Ultra-low power consumption	Longer battery life and lower cost
Small chip package (3.5mm x 3mm x 1mm)	Easy integration into existing designs and portable devices
Fully calibrated digital I2C interface output	Hassle-free integration
Supports reflow soldering	Fast and low-cost automated assembly

Swiss Sensirion thermal conductivity CO2 sensor CO2 sensor STC31 parameters:

Gas concentration
Calibration target	CO2 in nitrogen and CO2 in air
Measurement range	0 to 100 vol%
Typical accuracy	< 0.5 vol% (+3% of m.v.)
Repeatability	0.2 vol%
Resolution	16-bit
Temperature
Measurement range	-20 to 85
Resolution	16-bit
Typical accuracy	0.5 °C (10 °C to 50 °C) 1.5 °C (-20 °C to 85 °C)
Repeatability	0.1°C
Supply voltage	2.7 – 5.5 V
Supply current	5mA
Power consumption (when measuring once per minute)	5 µW