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SENSIRION STC31R3 Gas Sensor

The STC31 thermal conductivity sensor by Sensirion offers high reliability and long-term stability for gas concentration measurement applications. Utilizing CMOSens® technology, it provides calibrated CO2 and gas mixture detection with high accuracy, repeatability, and temperature compensation. Designed for high-volume OEM use, this sensor features an I2C digital interface, low power consumption, and precise measurement ranges from 0 to 25 vol% CO2 and up to 100 vol% in different gases. The compact package and easy integration make it suitable for environmental monitoring, industrial safety, and air quality systems.

Authorized Distributors
Part No:STC31-R3
Stock:664
Inv Date:06-15-2026
Price: Unit price: $69.16
Buy/RFQ:

SENSIRION STC31R3 Gas Sensor Specifications:

  • Measurement range: 0-25 vol% CO2, 0-100 vol% in gases
  • Accuracy: 0.5 vol% + 3% of measured value
  • Repeatability: 0.2 vol%
  • Temperature range: -20°C to 85°C
  • Temperature accuracy: 1.5°C (-20°C to 85°C), 0.5°C (10°C to 50°C)
  • Resolution: 16 bit
  • Power supply: 3.3V to 5.5V, typical 3-5 mA
  • Operating pressure: 600–1200 mbar
  • Dimensions: Small CMOSens package, precise land pattern recommended
  • Interface: I2C with selectable addresses (0x29 default), supports standard, fast, and fast mode plus
  • Material: CMOS sensor with protective packaging, RoHS and REACH compliant
  • Lifetime stability: Enhanced by CMOSens® technology, suitable for OEM mass production
  • Environmental: Non-corrosive gases, humidity compensation (optional via external sensor), low power consumption
  • Operational: ESD 2 kV HBM, storage temperature -20°C to 85°C

Buy the Buy Sensirion STC31 Part Number 3.000.331 Online

Discover the Sensirion STC31 gas sensor, designed for high-volume applications requiring dependable CO2 and binary gas measurement. This advanced thermal conductivity sensor features CMOSens® technology, providing exceptional long-term stability, high accuracy, and easy integration with digital I2C interface. Its compact form factor and low power profile make it ideal for environmental monitoring and industrial safety systems. Order online now and enhance your project’s reliability with our proven gas sensing solutions that ensure precise measurements even under demanding conditions.

Order your Sensirion STC31 thermal conductivity gas sensor today and ensure reliable, high-accuracy gas detection for industrial or environmental projects.

Frequently Asked Questions

Where can I buy SENSIRION STC31R3?

You can click on the BUY or RFQ button to purchase STC31R3 from an authorized SENSIRION distributor.

How do I troubleshoot issues or seek technical support for part STC31R3?

You can download the STC31R3 datasheet or visit the SENSIRION website for support.

Who is the manufacturer of STC31R3?

SENSIRION

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