STC31-C-R3

STC31-C-R3 is a smart CO₂ sensor based on thermal conductivity. This chip-sized gas concentration sensor for high-range, accurate CO₂ measurements designed for high-volume production. This sensor is based on a revolutionized thermal conductivity measurement principle, which results in superior repeatability and long-term stability. This makes the STC31-C 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-C 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.

• 0 - 100vol% measurement range, long term stable measurement
• ±0.2vol% baseline accuracy, low power
• ±2.0%MV linearity accuracy, I²C interface
• 0.5s response time (τ63%)
• 0.02vol%/°C temperature stability
• 2.7 to 5.5V supply voltage
• 50uA average supply current, 5mA maximum supply current
• Low-cross-sensitivity to humidity and oxygen concentration changes
• Digital and calibrated output of gas concentration and temperature
• Operating temperature range from -40°C to +105°C