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Air Quality 4 click
38-MIKROE-2896
Main info
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 This click can output a TVOC value readings as well as the CO2Product has been archived
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 a 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, that 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 click 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 the from , 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 the unmatched robustness against siloxanes contamination. This results with 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 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 measurement command is attempted.
The device also allows air humidity corrections over the results for both the compensated and raw values. However, an absolute humidity sensor should be used for obtaining the humidity reading. Readings from or any other similar can be used for this purpose. The appropriate I2C command will store the value into the on-chip memory and perform the corrections, accordingly.
There are additional components on Air quality 4 click, that are used to provide necessary voltage levels for the SGP30 sensor IC. This sensor uses not so common voltage level of 1.8V, so to provide a proper communication with 3.3V and 5V capable MCUs, a small LDO voltage regulator has to be used, along with the level shifter, which provides required logic voltage levels. The SPX3819M5, a small 500mA LDO voltage regulator is used to provide the power supply of 1.8V for the SGP30. For the level shifting, the PCA9306 dual bidirectional I2C bus and SMBus voltage level shifter is used. This level shifter IC allows shifting (converting) the I2C signal levels to the voltage level selected by the VCC SEL onboard SMD jumper. This allows both 3.3V and 5V capable MCUs to be interfaced with the Air quality 4 click.
More detailed information about all the available I2C commands can be found in the . However, all the functions and commands necessary to perform air quality readings, as well as functions used to calculate H2 and Ethanol concentration levels, are contained within the Air quality 4 click libraries, provided with this click board™. Their usage is demonstrated in the included example application, which can be used as a reference for a custom application design.
mikroSDK
This click board is supported with - MikroElektronika Software Development Kit. To ensure proper operation of mikroSDK compliant click board demo applications, mikroSDK should be downloaded from the and installed for the compiler you are using.
For more information about mikroSDK, visit the .
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You can order the goods to one of the Omniva Parcel terminals. Choose the desired terminal at the shopping cart. As the shipment arrives to the selected terminal, you will be sent an SMS-notification with an unique code. Go to the terminal within a week, enter the code and take your package. It is as simple as that.
See Omniva Parcel terminal locations here.
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Did not find an Omniva terminal at suitable location? Try SmartPost. Choose the desired terminal at the shopping cart. As the shipment arrives to the selected terminal, you will be sent an SMS-notification with an unique code. Go to the terminal within a week, enter the code and take your package. This method actually works for all parcel terminals.
See SmartPOST parcel terminal locations here.
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Make sure you check out also the locations of DPD parcel lockers. These are located all over Estonia. The delivery is the same. As the shipment arrives to the selected locker, you will be sent an SMS with a unique code. Go to the locker, enter the code and take your package.
See DPD parcel locker locations here.
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SmartPOST Finland is the best way to order goods to Finland. These terminals work the same way as in Estonia. As the shipment arrives to the selected terminal in Finland, you will be sent an SMS-notification with an unique code. Go to the terminal, enter the code and take your package.
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Matkahuolto is easy way to order goods to Finland. These are located also in smaller Finnish towns. As the shipment arrives to the selected Matkahuolto outlet, you will be sent an SMS-notification or an e-mail. Go to the outlet, show your ID and take your package.
See Matkahuolto outlet locations here.
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The courier will transport your goods from Photopoint straight to the provided address. The delivery will take place at workdays from 08:00 to 17:00. Hold your phone near you as the courier will call you prior to its arrival. Please make sure there is someone at the destination, eligible to receive the shipment.