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CO2 and VOC indoor air quality sensor module for Arduino and other microcontroller projects
This module has a CCS811 module that is an ultra low powered digital gas sensor using a metal oxide multi compound sensor. The module uses the onboard MCU to manage the sensor and provide the needed Analogue to Digital conversion and I2C interface making it simple to add to your project. It will detect a wide range of VOCs including Carbon Monoxide and can convert this to an eCO2 (equivalent CO2) value.
CJMCU-8118 a gas sensor chip system chip (SSoC) + temperature and humidity sensor, using low-power sensing technology to detect indoor volatile organic compounds (VOCs).
CCS811 CJMCU8118 board schematic structure of the figure we can see that this is not a simple sensor, it has integrated MCU, the sensor has an onboard processing capability, without host intervention, can provide the equivalent level of carbon dioxide or total volatile organic compounds (TVOC) index. At the same time, with the use of separate gas sensors and MCU solution, CCS811 can save equipment inventory costs as well as up to 60% of the total area of the board.
Specifications of CCS811 Carbon Dioxide CO2 Air Quality Gas Sensor Module:
- Supply Voltage: 1.8 ~ 3.6 V
- Average Supply Current: 30 mA In mode 1
- Peak Peak Supply Current: 54 mA In modes 2 and 3
- Power Consumption: 60 mW
- I2C Interface
- Ambient Temperature for Operation: -40 ~ 85 C
- Storage Temperature -40 ~ 125 C
- Relative Humidity (non-condensing): 10 ~ 95 %
- Excellent stability under high humidity
- The relative humidity is 2% (typical)
- Temperature accuracy of + 0.2 C (typical)
- Product Lifetime: >5 Years
- 14 bit resolution
- Sleep mode current is 100nA