Sensirion AGSTC31-R3Capteur de qualité de l’air

Chip-sized gas concentration sensor for high range, accurate CO2 measurements designed for high-volume production

The Most Effective Way to Measure High CO2 Concentrations

The STC31 is a chip-sized gas concentration sensor for high range, accurate CO2 measurements 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.


  • •  Cold chain logistics
  • •  Controlled atmosphere food transportation
  • •  Datalogging

Features and Benefits

  • •  Small chip-sized package: 3.5mm x 3.0mm x 1.0mm
  • •  Interface: I2C
  • •  Supply voltage range: 2.7 V to 5.5 V
  • •  Power consumption (@1 measurement per minute): 15 µW
  • •  Calibrated gas concentration and temperature output
  • •  Gas concentration measurement range: 0 to 100 vol%
  • •  Gas concentration accuracy: < 0.5 vol% (±3% of m.v.)
  • •  T measurement range: -20 to 85 °C
  • •  T accuracy:
  • •  0.5 °C (10 °C to 50 °C)
  • •  1.5 °C (-20 °C to 85 °C)

Technology Benefit
CMOSens® Technology designed for mass production Enable high-volume applications due to unprecedented
price-performance ratio that scales with quantities
Many years of experience in the medical and automotive industries Proven and reliable quality
Robust and long lifetime Reliable sensor output over product lifetime
On-chip humidity compensation Worry-free operation at high humidity
Ultra-low power consumption Longer battery life and cost savings
Small chip-sized package: 3.5mm x 3.0mm x 1.0mm Easy to integrate in existing design and portable devices
Fully calibrated digital output with I2C interface Easy hassle-free integration
Reflow solderable Fast, automated and low-cost assembly

Featured Articles and Videos

Field Calibration Guide

Related Product

Evaluation Kit SEK-STC31

A datasheet is only available for this product at this time.

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