SGP40-D-R4 | VOC Sensor SGP40

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

Technology and benefits

Technology	Benefit
Excellent longevity of > 10 years	Reliable sensor hardware
VOC Index driver	No signal processing programming by customer required
On-chip humidity compensation	Optimal performance in various environments
Low heat emission	Enhanced precision of RH&T readings, less backgrounds
Small footprint	Fits into every device
High sensitivity to almost all VOCs	Broadband sensor, which reacts well to typical VOCs
Average power consumption down to 2.6 mA/6 mW	Suitable for battery-powered devices
Voltage range of 1.7–3.6 V	Suitable for both mobile and hardwired devices
Digital I2C interface	Best performance-to-price ratio

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

Related Articles

Product Flyer

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.).