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SGP40

VOC sensor for indoor air quality applications

SGP40 is a digital VOC (volatile organic compounds) sensor designed for easy integration into air treatment devices and air quality monitors. 

 

Based on our patented CMOSens® Technology, the SGP40 offers a complete sensor system on a single chip and features a digital I²C interface, a temperature-controlled micro-hotplate and a humidity-compensated indoor air quality signal. In combination with our powerful VOC Algorithm (part of the gas index algorithm software), the sensor signal can be directly used to evaluate indoor air quality, e.g., for triggering the gradual fan control of an air treatment device. Both the SGP40 chip and VOC algorithm feature unrivaled robustness in the final application over their lifetimes. Pushing the multipixel and multi-hotplate approach to the next level of individual control of each sensing element, the SGP40 enables a drastic reduction in power consumption, making it suitable for battery-driven applications as well. On top of that, the SGP40 is compliant with the relevant healthy building standards RESET® and WELL Building Standard™ – for more information please refer to the application note "Compliance of Sensirion’s VOC Sensors with RESET and WELL" below. 

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Specification

VOC
Sensor output
Two digital 16-bit raw signals
Two digital 16-bit raw signals
Processed output
0-500 VOC Index
0-500 VOC Index
Measurement range
0 - 1000
0 - 1000ppm
Response time (τ63%)
< 10
< 10s
Device-to-device var.
15 - 15
15 - 15% m.v.
Limit of detection
< 0.05 ppm of ethanol equivalents or < 10 % of concentration setpoint, whichever is larger
< 0.05 ppm of ethanol equivalents or < 10 % of concentration setpoint, whichever is larger
Switch-on time
1
1h
On-chip humidity compensation
Yes
Yes
Generic
Supply voltage
1.7 - 3.6
1.7 - 3.6V
Average supply current
2600
2600uA
Max. supply current
3000
3000uA
Interfaces
I²C
I²C
Size (LxWxH)
2.44 x 2.44 x 0.85
2.44 x 2.44 x 0.85mm

Downloads

Datasheet SGP40
  • 09/2021•
  • PDF•
  • 935.9 KB
Datasheet09/2021PDF935.9 KB
Compliance of Sensirion’s VOC Sensors with RESET and WELL
  • 04/2023•
  • PDF•
  • 748.3 KB
Application note04/2023PDF748.3 KB
Transitioning from SGP30 to SGP40
  • 12/2020•
  • File•
Application note12/2020File
Handling and Assembly Instructions
  • 04/2023•
  • PDF•
  • 365.1 KB
Guide04/2023PDF365.1 KB
Quick testing guide SGP40
  • 08/2020•
  • PDF•
  • 459.9 KB
Guide08/2020PDF459.9 KB
Arduino driver SGP40
  • 04/2022•
  • Link•
Software04/2022Link
Embedded drivers SGP40
  • Link•
SoftwareLink
Gas index algorithm
  • Link•
SoftwareLink
Raspberry Pi drivers SGP40
  • Link•
SoftwareLink
How can air quality at home be improved?
  • 04/2022•
  • PDF•
  • 260.1 KB
Application note04/2022PDF260.1 KB
How can I integrate Sensirion’s VOC and NOx sensors into my air purifier?
  • 04/2022•
  • PDF•
  • 249.8 KB
Application note04/2022PDF249.8 KB
How can I make my air purifier smart/efficient?
  • 04/2022•
  • PDF•
  • 215.4 KB
Application note04/2022PDF215.4 KB
Is it possible to map the output of a MOX sensor to a norm?
  • 04/2022•
  • PDF•
  • 258.0 KB
Application note04/2022PDF258.0 KB
What are oxidizing gases?
  • 04/2022•
  • PDF•
  • 214.8 KB
Application note04/2022PDF214.8 KB
What are reducing gases?
  • 04/2022•
  • PDF•
  • 332.0 KB
Application note04/2022PDF332.0 KB
What is a metal oxide (MOX) sensor?
  • 04/2022•
  • PDF•
  • 288.2 KB
Application note04/2022PDF288.2 KB
What is Sensirion’s NOx Index?
  • 04/2022•
  • PDF•
  • 341.2 KB
Application note04/2022PDF341.2 KB
What is Sensirion’s VOC Index?
  • 04/2022•
  • PDF•
  • 300.4 KB
Application note04/2022PDF300.4 KB
Design-in guide SGP4x
  • 08/2020•
  • PDF•
  • 304.4 KB
Guide08/2020PDF304.4 KB
Testing guide SGP4x
  • 03/2021•
  • PDF•
  • 507.9 KB
Guide03/2021PDF507.9 KB
SEK-ControlCenter (all devices)
  • Link•
SoftwareLink
STEP file SGP40
  • STEP•
  • 1.3 MB
Drawings/CADSTEP1.3 MB
REACH and RoHS declaration SGP
  • 04/2026•
  • PDF•
  • 101.0 KB
Certificate04/2026PDF101.0 KB
Indoor air quality brochure
  • 11/2025•
  • PDF•
  • 7.0 MB
Flyer11/2025PDF7.0 MB
SGP4x evaluation kit
  • 10/2020•
  • PDF•
  • 1.7 MB
Flyer10/2020PDF1.7 MB
VOC and NOx product flyer
  • 10/2024•
  • PDF•
  • 341.9 KB
Flyer10/2024PDF341.9 KB
VOC and NOx product flyer Chinese
  • 03/2025•
  • PDF•
  • 677.9 KB
Flyer03/2025PDF677.9 KB
VOC and NOx product flyer Japanese
  • 08/2025•
  • PDF•
  • 3.0 MB
Flyer08/2025PDF3.0 MB

Smart sensors for your application

Sensirion's sensor solutions are used in a wide range of applications and markets. Our reliable environmental and flow sensors improve energy efficiency, increase health and ensure safety and comfort.

  • All products
  • NOx & VOC sensors
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Sensor evaluation

Buy the following products to evaluate this sensor

NameDescriptionSeriesCategory
SEK-SVM4xEvaluation kit SEK-SVM4x for SGP40/SGP41SEK-SVMxxNOx & VOC sensors

SEK-SVM4x

Evaluation kit SEK-SVM4x for SGP40/SGP41

SEK-SVMxx

NOx & VOC sensors

Download the respective viewer software to start measuring

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Evaluation Kit for SGP40 / SGP41
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SEK-SGP4x

Evaluation Kit for SGP40 / SGP41

  • NOx & VOC sensors
Evaluation kit SEK-SVM4x for SGP40/SGP41
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SEK-SVM4x

Evaluation kit SEK-SVM4x for SGP40/SGP41

  • NOx & VOC sensors
VOC and NOx sensor for indoor air quality applications
Active

SGP41

VOC and NOx sensor for indoor air quality applications

  • NOx & VOC sensors