SKU: SENS-0792
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Sensirion SCD30 NDIR CO₂, Temperature & Humidity Sensor Module - I²C/UART Output

₹2,389.00 (Inclusive of all taxes)
Out of Stock

The Sensirion SCD30 is a fully integrated, high-precision NDIR CO₂ sensor module with built-in temperature and humidity sensing. It provides digital output via I²C or UART interfaces, making it compatible with Arduino, Raspberry Pi, ESP32, and industrial PLCs for accurate environmental monitoring.

Features

  • NDIR dual-channel CO₂ sensing with 400–10,000 ppm range and ±(30 ppm + 3%) accuracy
  • Integrated temperature (±0.4°C) and relative humidity (±3% RH) sensors
  • Digital I²C, UART (Modbus), and PWM output interfaces for flexible system integration
  • Low average power consumption of 19 mA at a 2-second measurement interval
  • Maintenance-free operation with ASC (Automatic Self-Calibration) and a 15-year sensor lifetime

Out of stock

Description

The SCD30 employs a patented NDIR (Non-Dispersive Infrared) dual-channel detection principle for superior long-term stability and accuracy in CO₂ measurement. Its integrated Sensirion CMOSens® technology combines the CO₂ sensor with precise capacitive humidity and band-gap temperature sensing on a single chip, providing fully calibrated and linearized digital outputs.

Designed for low-power embedded systems, the module operates from a 3.3V to 5.5V DC supply and features fast response times. Its compact, low-profile form factor and robust digital communication protocols (I²C and UART) facilitate seamless integration into HVAC controls, building automation, IoT environmental monitors, and portable air quality devices.

Key Features

  • High-precision NDIR dual-channel CO₂ sensor for exceptional stability and repeatability
  • Fully integrated temperature and humidity sensing with industry-leading accuracy
  • Multiple digital interface options: I²C (up to 100 kHz), UART (Modbus protocol), and PWM output
  • Advanced calibration features including Automatic Self-Calibration (ASC) and Forced Re-Calibration (FRC) support
  • Optimized for low-power operation with an average current draw of 19 mA
  • Maintenance-free design with a certified operational lifetime of up to 15 years
  • Compact module dimensions (35 x 23 x 7 mm) for space-constrained embedded applications
  • Robust construction suitable for integration into professional HVAC and IAQ monitoring systems

Applications

  • Demand-Controlled Ventilation (DCV) and HVAC system efficiency optimization
  • Indoor Air Quality (IAQ) monitoring and smart building automation
  • Portable environmental data loggers and personal CO₂ monitors
  • Greenhouse and agricultural climate control systems
  • Classroom, office, and commercial space air quality assessment

Technical Specifications

Manufacturer Part NumberSCD30
Sensing PrincipleNDIR (Non-Dispersive Infrared)
CO₂ Measurement Range400 – 10,000 ppm
CO₂ Accuracy±(30 ppm + 3% of reading)
Temperature Range-40 to 70 °C
Temperature Accuracy±0.4 °C
Humidity Range0 – 100 %RH
Humidity Accuracy±3 %RH
Output InterfacesI²C, UART (Modbus), PWM
Supply Voltage3.3 – 5.5 VDC
Absolute Max Voltage-0.3 to 6.0 V
Average Current Consumption19 mA (at 2s interval)
Peak Current75 mA (max)
Response Time (CO₂)20 s
Module Dimensions (LxWxH)35 x 23 x 7 mm
Operating Temperature0 – 50 °C
Lifetime15 years

Frequently Asked Questions

What is the operating voltage range for the Sensirion SCD30 sensor?

The SCD30 operates from a 3.3V to 5.5V DC supply. The absolute maximum voltage range is -0.3V to +6.0V; exceeding these limits may permanently damage the sensor. It is compatible with standard 3.3V and 5V microcontroller logic levels.

How do I communicate with the SCD30, and what interfaces does it support?

The SCD30 provides digital communication via I²C (standard mode up to 100 kHz) and a UART interface configurable for Modbus protocol. It also offers a PWM output for a single-variable analog-like signal. The I²C interface is commonly used with platforms like Arduino, Raspberry Pi, and ESP32 for easy integration.

Does the SCD30 require calibration, and what is ASC?

The sensor is fully factory calibrated. It features Automatic Self-Calibration (ASC), a background algorithm that periodically references low CO₂ levels (assumed to be ~400 ppm ambient air) to maintain long-term accuracy. Forced Re-Calibration (FRC) using a known reference gas can also be performed via command if required by the application.

What is the typical power consumption and measurement interval?

The SCD30 has an average current consumption of approximately 19 mA when taking a measurement every 2 seconds. Power consumption scales with the measurement interval; less frequent measurements will reduce average current draw, making it suitable for battery-powered portable monitors.

Can the SCD30 be used outdoors or in harsh environments?

While the sensing element is rated from -40°C to 70°C, the module's recommended operating temperature is 0°C to 50°C. It is not inherently waterproof (IP-rated). For outdoor or harsh industrial use, it must be housed in a protected, weatherproof enclosure that allows for adequate air exchange with the environment being measured.

Package Includes

  • 1 x Sensirion SCD30 CO₂ Sensor Module

Additional Information

Weight 0.02 kg
Dimensions 3.5 × 2.3 × 0.7 cm