Raw signal from the sensor is processed using their software algorithm to give an overall ‘air quality value from 0 to 500.
This sensor, like all VOC/gas sensors, has variability, and to get precise measurements you will want to calibrate it against known sources! That said, general environmental sensors will give you a good idea of trends and comparisons.
Another nice element of this sensor is the ability to set humidity compensation for better accuracy. An external humidity sensor is required and then the RH% is written over I2C to the sensor, so it can better calibrate the MOX sensor reading and reduce humidity/temperature-based variations.
Specification
| Circuit | SGP40 |
| I2C Communication Interface Address | 0x59 |
| VOC Measuring Range | 0 ppm to 1000 ppm |
| VOC Index Value Measuring Range | 0 to 500 |
| Input Supply Voltage (VDC) | 3 ~ 5 |
| Communication Interface | I2C |
| Connector | STEMMA QT/Qwiic |
Reviews
There are no reviews yet.