Air quality 4 click is an advanced air quality sensing device that combines multiple metal-oxide sensing elements on a chip to provide detailed information of the air quality parameters. This click can output TVOC value readings as well as the CO2 equivalent concentration readings in an indoor environment. Besides these compensated attributes, the click can also output raw values of H2 and Ethanol in the air, which can be used to calculate gas concentrations, relative to a reference concentration.

The sensor used on Air quality 4 click is actually a complete system of sensors on a chip, featuring I2C interface, a temperature-controlled micro hotplate, and two compensated and processed indoor air quality signals. It is produced using the proprietary CMOSens technology, which provides very detailed information and robustness against air contamination. These attributes make Air quality 4 clicks a perfect solution for various air conditioning systems, ventilation systems and other IoT applications where accurate, detailed, and reliable air quality readings are required.

How Does It Work?

The sensor IC used on Air quality 4 click, is theSGP30fromSensirion, a multi-pixel gas sensor for indoor applications. This sensor is actually a system of several metal-oxide sensing elements on a chip (pixels), used to measure and process readings of various gasses in the air and output them in a form of two complementary air quality readings Total Volatile Organic Compounds (TVOC) [ppb] and CO2 equivalent signal [ppm].

The traditional metal-oxide (MOX) sensors suffer from sensitivity and responsiveness degradation, after being exposed to siloxanes over time. Siloxanes are specific compounds commonly found in the air, which negatively affect the MOX sensors. To overcome this problem, the SGP30 sensors are made by utilizing the advanced MOXSens Technology, which provides these sensors with unmatched robustness against siloxane contamination. This results in unprecedented long-term stability and accuracy.

The SGP30 uses a dynamic baseline compensation algorithm and calibration parameters, to provide accurate readings of TVOC and CO2eq properties. These baseline values of the compensation algorithm can be stored externally and read back into the device with the appropriate I2C commands and can be used in an event of a power down or restart. For the first 15 seconds after the I2C initialization command, the sensor is in an initialization phase of collecting sensor measurements and baseline compensation data and will return fixed values of 400 ppm CO2eq and 0 ppb TVOC, when the measurement command is attempted.

Applications: A perfect solution for various air conditioning systems, ventilation systems, and other IoT applications where accurate, detailed, and reliable air quality readings are required.

Specifications and Features:

1. Type: Air Quality, Gas Sensor
2. Interface: I2C
3. Compatibility: mikroBUS
4. Click board: 57.15 x 25.4 mm
5. Input Voltage: 3.3V or 5V
6. On-board modules SGP30 from Sensirion, a multi-pixel gas sensor,
7. SPX3819M5, a small 500mA LDO voltage regulator from EXAR,
8. PCA9306 dual bidirectional I2C bus, and SMBus voltage level shifter from Texas Instruments

Package Includes:

1 x Mikroe AIR QUALITY 4 CLICK