Sensirion SCD42-D-R2 Mini CO2 Sensor 400-5000 ppm, I2C, Low Power
Sensirion SCD42-D-R2 Mini CO2 Sensor 400-5000 ppm, I2C, Low Power - Image 2
SKU: SENS-0789
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Sensirion SCD42-D-R2 Mini CO2 Sensor 400-5000 ppm, I2C, Low Power

₹5,289.00 (Inclusive of all taxes)
Out of Stock

The Sensirion SCD42-D-R2 is a miniaturized, low-power COâ‚‚ sensor module with an I2C digital interface, designed for integration into portable devices, smart home systems, and HVAC controls. It provides accurate COâ‚‚ measurement from 400 to 5000 ppm, with integrated temperature and humidity compensation for reliable air quality monitoring.

Features

  • High-accuracy COâ‚‚ sensing with ±(50 ppm + 5%) accuracy from 400–2000 ppm.
  • Integrated temperature and humidity sensor for comprehensive environmental compensation.
  • Ultra-low power consumption (typ. 19 mA avg.) suitable for battery-powered applications.
  • Compact LGA package with I2C digital interface for easy PCB integration.
  • Fast response time (T90 < 60 seconds) for dynamic air quality monitoring.

Out of stock

Description

The SCD42-D-R2 utilizes Sensirion’s proven photoacoustic sensing (PASens®) technology for precise and stable COâ‚‚ measurement. This MEMS-based sensor features built-in signal conditioning and advanced compensation algorithms to minimize drift and ensure long-term reliability. Its digital I2C output provides calibrated readings directly, simplifying integration with microcontrollers like Arduino, ESP32, and Raspberry Pi.

Designed for demanding applications, the sensor operates across a wide temperature range of -10°C to 60°C and 0-100% RH non-condensing. The module’s compact, surface-mount LGA package and low average current draw make it an optimal choice for space-constrained and energy-conscious designs in portable air quality monitors, demand-controlled ventilation, and IoT environmental sensing nodes.

Key Features

  • Photoacoustic Sensing Core: Employs Sensirion's PASens® technology for robust, low-drift COâ‚‚ measurement independent of ambient pressure variations.
  • Fully Integrated System: Combines COâ‚‚, temperature, and humidity sensing in a single chip with onboard digital processing.
  • Optimized Power Profile: Features single-measurement mode with automatic sleep, achieving an average current below 19 mA for extended battery life.
  • Factory Calibrated: Delivers calibrated COâ‚‚, temperature, and humidity values via I2C, eliminating the need for user-side calibration.
  • High Environmental Robustness: Operates reliably across a broad temperature and humidity range with built-in self-heating compensation.
  • Miniature Form Factor: Surface-mount LGA package (10.1 x 10.1 x 6.5 mm) enables ultra-compact product designs.
  • Compliance Ready: Conforms to REACH and RoHS environmental standards for global market deployment.

Applications

  • Demand-Controlled Ventilation (DCV): Precise COâ‚‚ monitoring in office buildings, schools, and conference rooms to optimize HVAC energy use.
  • Portable Air Quality Monitors: Battery-operated handheld devices for personal exposure assessment and indoor environmental quality logging.
  • Smart Thermostats & HVAC Controls: Integration into wall-mounted units for enhanced occupancy-based comfort and air quality management.
  • IoT Environmental Sensing Nodes: Wireless sensor networks for building automation, green building certification, and facility health monitoring.
  • Educational & Research Kits: Reliable sensor for prototyping air quality projects on Arduino, Raspberry Pi, and ESP32 platforms.

Technical Specifications

Manufacturer Part NumberSCD42-D-R2
Sensor TypeCOâ‚‚, Temperature, Humidity
CO₂ Measurement Range0 – 40,000 ppm
CO₂ Accuracy (400–2000 ppm)±(50 ppm + 5% of reading)
Temperature Range-10 °C to 60 °C
Humidity Range0 – 100 %RH
Temperature Accuracy± 0.8 °C
InterfaceI²C (3.3V logic)
Supply Voltage3.3 V DC
Average Current Consumption~19 mA (typical, 1s measurement interval)
Peak Current175 mA
Response Time (T90)< 60 seconds
Resolution16-bit (digital output)
Package TypeLGA
Dimensions (L x W x H)10.1 x 10.1 x 6.5 mm (sensor)
Module Dimensions (approx.)82 x 34.4 mm (provided board)
Weight25 g (module)

Frequently Asked Questions

What is the operating voltage and logic level for the SCD42-D-R2's I2C interface?

The SCD42-D-R2 requires a 3.3V DC supply voltage. Its I2C communication interface also operates at 3.3V logic levels. It is not 5V tolerant; if connecting to a 5V microcontroller, level-shifting circuitry is required for the SDA and SCL lines to prevent damage.

How do I read data from the SCD42 sensor using an Arduino or ESP32?

Data is read via the I2C protocol. You will need to install the official Sensirion SCD4x library for Arduino or ESP32. The library provides simple functions to start periodic measurements and read the calibrated COâ‚‚ concentration, temperature, and relative humidity values directly from the sensor's registers.

What is the typical power consumption, and is it suitable for battery-powered projects?

Yes, its low-power design makes it ideal for battery operation. In its optimized single-shot measurement mode, the average current consumption can be as low as 19 mA. By putting the sensor into sleep mode between readings, you can significantly extend battery life in portable air quality monitors.

Does the sensor require any calibration, and what is its long-term stability?

The SCD42-D-R2 is factory calibrated and does not require user calibration. It features Sensirion's advanced compensation algorithms and the photoacoustic sensing principle, which provides excellent long-term stability and very low drift, ensuring reliable measurements over the product's lifetime.

Can this sensor measure CO2 levels above 5000 ppm?

Yes. While its optimal accuracy range is between 400 and 5000 ppm, the sensor's full specified measurement range extends from 0 up to 40,000 ppm. It is suitable for applications requiring detection of higher concentrations, though accuracy follows a different specification outside the core range.

Package Includes

  • 1 x Sensirion SCD42-D-R2 Mini CO2 Sensor Module

Additional Information

Weight 0.025 kg
Dimensions 8.2 × 3.44 cm

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