Gas Sensor Platform SGP4xExperts in environmental sensing

SGP4x Multi-Pixel Gas Sensors
The SGP4x gas sensor platform for VOC and/or NOx measurements is designed as a digital smart switch and regulation unit for air treatment devices such as air purifiers.
The sensor’s raw signals are processed by Sensirion’sGas Index Algorithm, and can be used directly to automatically trigger the removal of indoor air gas pollutants by
air treatment devices without the need for user-device
interaction. This sensor solution is thus well-suited forconstant monitoring of VOC and NO x levels, including
potentially harmful events which are imperceptible tohumans. Furthermore, automatic control of air treatment
devices based on the SGP4x’s signals helps to saveenergy by turning them off once the VOC and/or NO x
events have been taken care of.
SGP4x sensors are metal oxide-based and integrate CMOSens® sensor systems onto a single chip. They offer a solution
for one (SGP40) or two (SGP41) complete sensors, facilitating design-in and cutting design costs. Thanks to its very small
DFN packaging (2.44 × 2.44 × 0.85 mm³), the sensor can be incorporated into applications with limited space.
The SGP4x’s multi-pixel sensing element features unmatched robustness against contaminating gases that are present
in real-world applications, enabling its exceptional long-term stability and low drift. Sensirion’s state-of-the-art production process guarantees high reproducibility and reliability. Tape and reel packaging, together with its suitability forstandard SMD assembly processes, make the SGP4x appropriate for high volume applications.

Signal output

SGP40

SGP41

VOC

yesyesNOxnoyes

Applications• Air purifiers• Kitchen hoods• Demand-controlled ventilation• Air exchange units

Technology and benefits
TechnologyBenefits

Excellent longevity of >10 years thanks tosiloxane-­resistance (MOXSens® Technology)

Reliable sensor hardware

Gas Index Algorithm

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

Two sensors on a single chip (SGP41)

Cost reduction and easier design-inSpecifications
Gas Sensing Specifications

VOCNOxApplicable product

SGP40, SGP41

SGP41

Algorithm output

1–500 VOC Index points 1

1–500 NOx Index points ¹Sensor raw output

16-bit ticks

16-bit ticks ²

Measurement range

0–1,000,000 ppb of ethanol equivalents

0–10,000 ppb of NO2

Device-to-device variation< ± 15 VOC Index points or % m.v.
(whichever is larger)< ± 50 NOx Index points or % m.v.

Limit of detection< 50 ppb of ethanol equivalents or< 10 % of concentration setpoint­(whichever is larger)< 20 ppb of NO2 or< 10 % of concentration setpoint­(whichever is larger)

Response time (tau 63%)

< 10 s< 250 sSwitch-on time

< 60 s< 60 sSupply voltage range

1.7–3.6 V

1.7–3.6 V

Idle current

34 µA

34 µA

Current consumption during
operation at 1.8 V

3.5 mA

4.3 mA

at 3.3 V

2.6 mA

3.0 mA

I2C

I²C

2(whichever is larger)

Electrical Specifications

Interface

1 Sensirion’s Gas Index Algorithm processes the raw signals externally into read-to-use air quality signals.
2 The raw signal is proportional to the logarithm of MOX resistance.

SEK-SVM4x Evaluation Kit
The SEK-SVM4x evaluation kit has been designed for easy and cost-efficient evaluation of Sensirion’s SGP40 VOC andSGP41 VOC+NOx sensor. The kit contains the SVM41 sensor module and is equipped with an SGP41, an SHT40 humidity
sensor and a microcontroller featuring VOC and NOx Index, relative humidity and temperature outputs via either an I²Cor UART interface.
In addition to the SVM41, the SEK-SVM4x comes with aUART-USB cable that allows for evaluation of the sensors,e.g., 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, RaspberryPi, etc.). The softwareand relevant documentation can be downloaded fromour website.
Learn more: www.sensirion.com/my-sgp-ek

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), formaldehyde, NOx 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.

www.sensirion.com/sgp