SKU: SENS-0266
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Sensirion SGP40-D-R4 Indoor Air Quality Sensor - Digital DFN 6-Pin

₹479.00 (Inclusive of all taxes)
Out of Stock

The Sensirion SGP40-D-R4 is a digital metal-oxide (MOX) gas sensor designed for indoor air quality (IAQ) monitoring, providing a VOC-based index via a standard I2C interface. It is compatible with 3.3V and 5V logic systems, including Arduino, Raspberry Pi, ESP32, and STM32 platforms.

Features

  • Digital VOC sensor for indoor air quality (IAQ) monitoring
  • Standard I2C interface for easy microcontroller integration
  • Low-power operation from 1.7V to 3.6V supply voltage
  • Compact DFN package with 6 pins for space-constrained designs
  • On-chip signal processing and temperature compensation

Out of stock

Description

The SGP40-D-R4 utilizes Sensirion’s advanced CMOSens® technology, integrating a metal-oxide (MOX) sensing element with a digital signal processor on a single chip. This design provides a robust, calibrated digital output representing a VOC (Volatile Organic Compounds) index, enabling the detection of a wide range of indoor air contaminants without requiring specific gas calibration.

Operating from a 1.7V to 3.6V supply, the sensor is optimized for low-power battery-operated devices and portable electronics. Its compact DFN package and I2C communication protocol make it ideal for integration into smart home systems, HVAC controls, air purifiers, and IoT environmental monitoring nodes.

Key Features

  • CMOSens® Technology: Integrated MOX sensor and digital signal processor for high reliability and long-term stability.
  • Digital I2C Output: Provides a fully calibrated VOC index signal, simplifying system integration and software development.
  • On-Chip Compensation: Built-in algorithms compensate for temperature and humidity effects on the sensor signal.
  • Optimized Power Profile: Low operating voltage range supports energy-efficient designs and extended battery life.
  • Robust DFN Package: Miniature 6-pin dual-flat no-lead package ensures durability and a small PCB footprint.
  • Wide Operating Range: Functions reliably in typical indoor environments from -10°C to 50°C.

Applications

  • Smart thermostats and HVAC system air quality feedback
  • Demand-controlled ventilation (DCV) systems in buildings
  • Portable and wearable indoor air quality monitors
  • Air purifier and cleaner automatic mode control
  • IoT environmental nodes for smart home and office automation

Technical Specifications

Manufacturer Part NumberSGP40-D-R4
Sensor TypeDigital Metal-Oxide (MOX) VOC Sensor
Output InterfaceI2C
Supply Voltage1.7 V to 3.6 V DC
Operating Temperature-10°C to 50°C
Package / CaseDFN (Dual-Flat No-Lead)
Pin Count6
Measurement PrincipleCMOSens® (Integrated MOX)
Primary OutputVOC Index

Frequently Asked Questions

What is the communication protocol for the SGP40-D-R4 sensor?

The SGP40-D-R4 communicates via a standard I2C interface. It uses a 7-bit slave address and provides a fully digital, calibrated VOC index output, eliminating the need for analog signal conditioning and simplifying integration with microcontrollers like Arduino, ESP32, or Raspberry Pi.

What is the recommended supply voltage and power consumption?

The sensor operates from a 1.7V to 3.6V DC supply, making it suitable for 3.3V logic systems and battery-powered devices. Its power consumption is optimized for low-energy applications, with specific current draw details available in the official Sensirion datasheet for precise system design.

Does this sensor require calibration?

No, the SGP40-D-R4 is a fully digital sensor with on-chip calibration. It outputs a processed VOC index value directly via I2C. However, for optimal long-term accuracy, Sensirion recommends following their on-chip aging compensation procedure as outlined in the technical documentation.

What does the sensor actually measure?

The sensor measures a wide spectrum of Volatile Organic Compounds (VOCs) commonly found indoors. It outputs a VOC Index, which is a relative measure of air quality, rather than concentrations of specific gases. This index is useful for detecting overall changes in indoor air contamination levels.

Package Includes

  • 1 x Sensirion SGP40-D-R4 Indoor Air Quality Sensor

Additional Information

Weight 0.01 kg
Dimensions 10 × 7 × 3 cm