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SCD43 Datasheet

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7Semi Compact SCD43 CO2, Temperature and Humidity Sensor Breakout with I2C Interface
The 7Semi SCD43 CO2, Temperature and Humidity Sensor Breakout Mini is a compact environmental-sensing module based on Sensirion’s SCD43. It combines direct CO2 measurement with integrated temperature and relative-humidity sensing, making it suitable for indoor air-quality monitors, HVAC controls, smart-building systems, IoT devices, thermostats, and space-constrained embedded applications. The SCD43 uses PASens photoacoustic NDIR technology and provides a CO2 output range of 040,000ppm. Its specified CO measurement accuracy is +-(30ppm + 3% of reading) across the 4005,000ppm specified measurement range.
The Mini breakout communicates through I2C and accepts a 2.45.5V supply, allowing operation from common 3.3V and 5V embedded systems. It supports automatic self-calibration (ASC), forced recalibration (FRC), periodic measurement, low-power operation, and single-shot measurements. At only 20 20 7.5 mm, the board provides the SCD43 sensing functions in a smaller footprint than the larger 7Semi SCD43 breakout.
Key Features

Three Environmental Measurements: Measures CO concentration, temperature, and relative humidity
True CO Measurement: Uses Sensirion PASens photoacoustic NDIR technology
Wide CO Output Range: Provides output values from 040,000ppm
Specified CO Range: Accuracy specified from 4005,000ppm
High CO Accuracy: +-(30ppm + 3% of measured value) from 4005,000ppm
IC Interface: Digital communication for straightforward embedded integration
Automatic Self-Calibration: ASC supports long-term CO2 measurement stability under suitable operating conditions
Forced Recalibration: FRC enables recalibration against a known CO2 reference
Single-Shot Mode: Supports on-demand measurements for low-duty-cycle applications
Temperature Sensing: Typical 0.8C accuracy from 15C to 35C
Humidity Sensing: Typical 6%RH accuracy under specified conditions
Wide Supply Range: Operates from 2.45.5V
Compact Mini PCB: Measures only 20 20 7.5 mm
Factory-Calibrated Sensor: Calibration certificate can be requested using the sensor serial number

Applications

Indoor air-quality monitors
HVAC ventilation control
Smart thermostats
Smart-building systems
Demand-controlled ventilation
IoT environmental monitors
Office and classroom CO monitoring
Air purifiers
Building-management systems
Environmental data loggers
Compact embedded sensing systems
Battery-powered monitoring devices

SCD4X CO2 Measurement SensorPinout Reference Guide

Calibration Certificate
A calibration certificate is available for the sensor. To request the certificate, please email us the sensor serial number, and we will share the corresponding calibration certificate.
Package Includes:

1x7Semi SCD43 Breakout Board (ES-12295-v1)
1xPin Header