STC31-C-R3

STC31-C-R3 is a smart CO2 sensor. It features a digital I²C interface, which makes it easy to connect directly to a microprocessor. The STC31-C sensor is a thermal conductivity gas concentration sensor designed for high-volume applications. It utilizes a revolutionary thermal conductivity measurement principle, which results in superior repeatability and long-term stability. The outstanding performance of this sensor is based on Sensirion’s patented CMOSens® sensor 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.

• Digital and calibrated output of gas concentration and temperature
• Long-term stable measurement, low power
• Low-cross-sensitivity to humidity and oxygen concentration changes
• 0 to 100 vol % specified CO₂ measurement range
• 0.5s response time (τ63%)
• 0.02 vol%/°C temperature stability
• 2.7 to 5.5V supply voltage
• 50uA average supply current
• Measurement range from -40°C to 105°C
• Size (LxWxH) is 3.30mm x 2.54mm x 0.76mm