SGT PAS-2201二氧化碳气体传感器基于创新的 PAS（光声光谱）技术，因而能够以非常小的占板空间，实现极其高效的空气质量监测。该传感器的外观尺寸相比传统二氧化碳NDIR传感器将大大缩小，适用的场景也成倍增加。
PAS（光声光谱）技术利用光声传感原理实现了高机械稳定性，进而确保了传感器的精确输出，无需重新校准序列，令传感器的整体性能更稳定。另外，光声传感技术的信号是随着二氧化碳的浓度增加而增强（红外气体测量感应技术则相反），因此能够实现更高的精度。
SGT PAS-2201二氧化碳气体传感器中集成的硅麦探测器可以将二氧化碳浓度测量精度推进到±15 ppm范围，达到当前国际一流水平。技术参数表如下：
Item | Sigan SGT PAS-2201 | Infineon XENSIV PAS CO2 | Sensirion SCD41 |
Operating range | 0~10000ppm | 0~10000ppm | 0~40000ppm |
Accuracy@ 400~5000ppm | ± (30 ppm +3%) | ± (30 ppm +3%) | ± (40 ppm +5%) |
Repeatability | 15ppm? | 15ppm(max) | ± 10 ppm |
Response time | 60s | 75s | 60s |
Lifetime @ Typical operating conditions | 10 years | 10 year | 10year |
Operating temperature | 0-50°C | 0-50°C | -10~60°C |
Operating relative humidity | 0~ 85% | 0~ 85% | 0~ 95% |
Interface | I2C/UART/PWM | I2C, UART, and PWM | I2C |
Supply voltage | 4.5~5.5V | 12 V for the emitter 3.3V for others | 2.4~5.5V |
Average power consumption
| <30mW @1 measurement/minute | <30mW @1 measurement/minute | <0.4mA avg. @1 measurement/5 minute |
Package | 20 x 15 x 8 mm3 | 14 x 14 x 7.5 mm3 | 10.1x 10.1 x 6.5 mm3 |
Others | Temperature sensor Humidity sensor |
