SKU: SENS-0775
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SGP40 Digital Gas Sensor Module with Cotton Core & Card Holder - 1m Cable

₹1,469.00 (Inclusive of all taxes)
Out of Stock

The SGP40 is a digital multi-pixel gas sensor module with a built-in cotton filtration core, designed for integration into air quality monitoring systems. It communicates via I2C interface and operates on a 3.3V to 5V DC supply, making it compatible with Arduino, Raspberry Pi, ESP32, and other microcontrollers for detecting a wide range of indoor volatile organic compounds (VOCs).

Features

  • Digital multi-pixel MOX gas sensor for robust VOC detection
  • Integrated cotton filter core protects sensor from dust and particulates
  • I2C digital interface for easy microcontroller integration (Arduino, Raspberry Pi, ESP32)
  • Wide operating voltage range of 3.3V to 5V DC
  • Includes card holder for secure and flexible mounting

Out of stock

Description

The SGP40 sensor module from Sensirion employs a sophisticated metal-oxide (MOX) sensing principle on a silicon-based micro-hotplate. This digital sensor provides a robust signal directly proportional to the concentration of volatile organic compounds (VOCs) in the air, offering excellent long-term stability and minimal drift. The built-in cotton core acts as a pre-filter, extending sensor life by trapping larger dust particles before they reach the sensitive element.

Housed in a durable black plastic shell, the module is designed for reliable operation in typical indoor environments. Its 1-meter cable provides flexibility for installation in air purifiers, smart HVAC systems, and indoor air quality monitors. The integrated card holder simplifies secure mounting within an enclosure or on a PCB.

Key Features

  • High-sensitivity digital MOX gas sensor for VOC air quality index (AQI) measurement
  • On-chip signal processing delivers a calibrated digital I2C output
  • Built-in cotton filtration core for enhanced sensor longevity and dust protection
  • Robust black plastic housing with integrated mounting card holder
  • Optimized for low-power operation with a wide 3.3V to 5V supply range
  • Excellent long-term stability and low drift for consistent monitoring
  • Compact form factor with a 1-meter attached cable for flexible system integration

Applications

  • Indoor Air Quality (IAQ) monitors and smart home sensors
  • Demand-controlled ventilation (DCV) systems in HVAC units
  • Air purifier and filter change indicator systems
  • Embedded air quality sensing in IoT devices and environmental data loggers
  • VOC detection for laboratory safety or industrial indoor environment monitoring

Technical Specifications

Manufacturer Part NumberSGP40
Sensor TypeDigital Metal-Oxide (MOX) Gas Sensor
Detected GasesVolatile Organic Compounds (VOCs)
Output InterfaceI2C
Supply Voltage3.3V to 5V DC
Operating Temperature5°C to 30°C
Operating Humidity0% to 90% RH (non-condensing)
Sampling Rate1 Hz
Housing MaterialPlastic (Shell), Cotton (Filter Core)
Cable Length1 Meter
Module WeightApprox. 24 g

Frequently Asked Questions

What gases does the SGP40 sensor detect?

The SGP40 is a metal-oxide (MOX) sensor designed to detect a broad range of Volatile Organic Compounds (VOCs) commonly found indoors. It provides a VOC Index output rather than detecting specific gases like CO2 or CO. It is ideal for general indoor air quality assessment.

What is the purpose of the built-in cotton core?

The integrated cotton core acts as a pre-filter to protect the sensitive MOX sensor element from dust, fibers, and larger airborne particulates. This extends the operational lifespan of the sensor and helps maintain measurement stability by preventing contamination of the hotplate surface.

How do I interface the SGP40 with an Arduino or Raspberry Pi?

The SGP40 communicates via the I2C protocol. Connect the module's VCC to 3.3V or 5V (compatible with both), GND to ground, SDA to the I2C data pin (e.g., Arduino A4 or GPIO2 on Raspberry Pi), and SCL to the I2C clock pin (e.g., Arduino A5 or GPIO3 on Raspberry Pi). Use the official Sensirion SGP40 library for easy integration.

What is the operating voltage range for the SGP40 module?

The module is designed to operate from a 3.3V to 5V DC power supply. Ensure your microcontroller or power source provides a stable voltage within this range. The I2C logic levels are compatible with both 3.3V and 5V microcontrollers.

Does the sensor require any calibration or pre-heating time?

The SGP40 is a digitally calibrated sensor and does not require user calibration. However, upon power-up, the sensor requires a short initialization and self-test period. For optimal stability, a brief pre-heating time (a few minutes) is recommended before taking accurate readings, as specified in the datasheet.

Package Includes

  • 1 x SGP40 Gas Sensor Module with Cotton Core
  • 1 x Card Holder for Mounting

Additional Information

Weight 0.024 kg