New VOC Sensor SGP40 and SEK-SVM40 Evaluation Kit

Written by Mike Benson

August 31, 2020

The SGP40 is an integrated CMOSens® sensor system on a single chip based on a metal-oxide sensor. It provides a humidity-compensated indoor air quality signal via a digital I2C interface. By relying on Sensirion’s proven MOXSens® Technology, the sensor’s unmatched robustness against contamination by siloxanes results in outstanding long-term stability in terms of sensitivity and response time. Pushing the sensing material and micro-hotplate technology to the next level, the SGP40 offers a drastic reduction in power consumption, making it suitable for battery-driven applications as well. Sensirion’s industry-leading production processes guarantee high reproducibility and reliability.

Sensirion’s powerful VOC Algorithm analyzes VOC events detected by the SGP40 VOC sensor and maps them to a VOC Index. This VOC Index provides a practical quantification of VOC events relative to each individual sensor’s average indoor environment. In this way, it behaves similarly to the human nose, which is highly susceptible to changes in odor, but it also detects VOC events that are not perceived by humans. The VOC Index indicates to what extent the indoor air quality has deteriorated or improved compared to the sensor’s average VOC environment. This information can be used, e.g., for gradually controlling the fan of an air treatment device or to provide users with feedback on their daily activity profile.

Features  

  • Complete sensor solution for detecting VOC events
  • Proven performance improved
  • Reliable and accurate long-term user experience

Applications

  • Air purifiers
  • Kitchen hoods
  • Demand-controlled ventilation
  • Thermostats
  • Indoor air quality monitoring

Core values

  • Long term stability of metal oxide gas sensors
  • Humidity compensation
  • Low power consumption

Products Details:

SEK-SVM40 Evaluation Kit

 

The SEK-SVM40 evaluation kit has been designed for easy and cost-efficient evaluation of Sensirion’s SGP40 VOC sensor. The kit contains the SVM40 sensor module and is equipped with an SGP40, a humidity and temperature sensor and a microcontroller featuring VOC Index, relative humidity and temperature outputs via either an I2C or UART interface.

In addition to the SVM40, the SEK-SVM40 comes with a UART-USB cable that allows, e.g., for evaluation of the sensors by Sensirion’s easy-to-use SEK-ControlCenter viewer software as well as a 6-pin jumper wire cable that enables fast prototyping, e.g., through integration into existing platforms (like Arduino, Raspberry Pi, etc.).

The software and relevant documentation can be downloaded from our website. Learn more: www.sensirion.com/sek

Indoor air quality and volatile organic compounds

 

Good air quality in our living and working environments is becoming increasingly important because most people nowadays spend 90% of their time indoors. VOCs are one of the main contributors to bad air quality, and awareness of them among individuals and governments has been increasing. Modern building materials and methods result in better insulation, and thus improved energy efficiency, but they also limit air exchange with the outside world and hence lead to higher VOC concentrations indoors. Exposure to high and/or hazardous levels of VOCs can be avoided by appropriate ventilation or by identifying and eliminating the pollution source. Sensirion’s SGP40 is a broad-band VOC sensor which reliably detects high-VOC events. When built into an air quality monitor, it allows users to identify the sources of such events and take appropriate action. Integrated into smart air treatment devices, it enables automatic, demand-controlled operation.

Sensirion’s powerful VOC Algorithm analyzes VOC events detected by the SGP40 sensor and maps them to a VOC Index. This VOC Index provides a practical quantification of VOC events relative to each individual sensor’s typical indoor environment. In this way, it behaves similarly to the human nose, which is highly susceptible to changes in odor, but it also detects VOC events that are not perceived by humans. The VOC Index indicates to what extent the indoor air quality has deteriorated or improved compared to the sensor’s typical VOC environment. This information can be used, e.g., for gradually controlling the fan of an air treatment device or to provide users with feedback on their daily activity profile.

Unique performance thanks to MOXSens® technology

The sensing principle of the SGP is based on a heated film of metal-oxide (MOx) nanoparticles. Adsorbed oxygen on the metal-oxide particles reacts with the target gas and thereby releases electrons. This results in a change of the electrical resistance of the metal-oxide layer that is measured by the sensor.

The SGP multi-pixel gas sensor platform integrates four sensing elements − the pixels – into one small DFN package. Using Sensirion’s CMOSens® Technology, the SGP offers a complete sensor system on a single chip featuring a digital I2C interface, a temperature-controlled microhotplate, as well as preprocessed and calibrated indoor air quality signals.

Optimized metal-oxide sensing materials in combination with Sensirion’s multi-pixel gas measurement platform result in a unique resistance against contamination by siloxanes – MOXSens® Technology. Sensirion’s MOXSens® Technology enables highly sensitive and reliable gas measurements of indoor air pollutants such as volatile organic compounds and hydrogen.

Environmental Sensing

Environmental conditions have a major impact on our well-being, comfort, and productivity. Sensirion’s sensor solutions provide detailed and reliable data on key environmental parameters such as humidity, temperature, volatile organic compounds (VOCs), particulate matter (PM2.5), and CO2. Environmental Sensing opens up new possibilities to create smarter devices that improve our comfort and well-being as well as increase energy efficiency in a wide variety of applications.

We accompany you through the entire product development process, from the initial idea to product launch and beyond. Our expertise ranges from prototype construction, design-in support and use-case development to inline testing at the mass production stage.

More about environmental sensing

Interested? Email us at [email protected]

Information extracted from sensirion.com (link)

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