STC31
CO₂ accuracy of ±(0.5 vol% + 3% MV) @0-100 vol%
The STC31 is a chip-sized gas concentration sensor for high range, accurate CO₂measurements 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. The STC31 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. 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.
Specification
| CO₂ | |||
|---|---|---|---|
| Specified CO₂ Measurement Range 0 - 100 | 0 - 100 | vol % | |
| Accuracy ±3.0 | ±3.0 | ||
| Response time (τ63%) < 2 | < 2 | s | |
| Temperature stability 0.025 | 0.025 | vol%/°C |
| Generic | |||
|---|---|---|---|
| Supply voltage 2.7 - 5.5 | 2.7 - 5.5 | V | |
| Average supply current 50 | 50 | uA | |
| Max. supply current 5000 | 5000 | uA | |
| Interfaces I²C | I²C | ||
| Size (LxWxH) 3.5 x 3 x 1 | 3.5 x 3 x 1 | mm |
