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Details CO2 measurement accuracy, repeatability, and response time.
Provides humidity measurement range, accuracy, and repeatability.
Specifies temperature measurement range, accuracy, and repeatability.
Details voltage, current, and signal level specifications for the sensor.
Defines stress levels beyond which damage or performance degradation may occur.
Describes I2C interface pinout, data transmission, and signal timing.
Lists system timings for power-up, soft reset, and clock frequency.
Confirms REACH and RoHS compliance for the device.
Explains sensor power-up sequence and I2C communication initiation.
Defines the format and length of data transmitted via I2C.
Illustrates different I2C communication patterns for commands.
Provides a comprehensive list of SCD4x commands and their parameters.
Details commands for starting/stopping periodic measurement and reading data.
Explains compensation for temperature and pressure effects on sensor output.
Describes Forced Recalibration (FRC) and Automatic Self-Calibration (ASC).
Details the low power periodic measurement mode and its characteristics.
Covers features like persisting settings, serial number, self-test, and reset.
Describes on-demand measurement mode for SCD41 sensors.
Explains the 8-bit CRC checksum generation algorithm for I2C communication.
Provides nominal dimensions and tolerances of the SCD4x package.
Recommends land patterns, solder paste, and solder mask for PCB assembly.
Details the packaging tape and reel specifications for automated assembly.
Specifies handling requirements based on Moisture Sensitivity Level 3 (MSL3).
Provides guidelines for reflow soldering the SCD4x sensor.
Explains electronic serial number for identification and traceability.
Details CO2 measurement accuracy, repeatability, and response time.
Provides humidity measurement range, accuracy, and repeatability.
Specifies temperature measurement range, accuracy, and repeatability.
Details voltage, current, and signal level specifications for the sensor.
Defines stress levels beyond which damage or performance degradation may occur.
Describes I2C interface pinout, data transmission, and signal timing.
Lists system timings for power-up, soft reset, and clock frequency.
Confirms REACH and RoHS compliance for the device.
Explains sensor power-up sequence and I2C communication initiation.
Defines the format and length of data transmitted via I2C.
Illustrates different I2C communication patterns for commands.
Provides a comprehensive list of SCD4x commands and their parameters.
Details commands for starting/stopping periodic measurement and reading data.
Explains compensation for temperature and pressure effects on sensor output.
Describes Forced Recalibration (FRC) and Automatic Self-Calibration (ASC).
Details the low power periodic measurement mode and its characteristics.
Covers features like persisting settings, serial number, self-test, and reset.
Describes on-demand measurement mode for SCD41 sensors.
Explains the 8-bit CRC checksum generation algorithm for I2C communication.
Provides nominal dimensions and tolerances of the SCD4x package.
Recommends land patterns, solder paste, and solder mask for PCB assembly.
Details the packaging tape and reel specifications for automated assembly.
Specifies handling requirements based on Moisture Sensitivity Level 3 (MSL3).
Provides guidelines for reflow soldering the SCD4x sensor.
Explains electronic serial number for identification and traceability.
The SCD4x is Sensirion's next-generation miniature CO2 sensor, designed to break size barriers in CO2 sensing with a compact form factor of 10.1 x 10.1 x 6.5 mm³. It utilizes photoacoustic NDIR (Non-Dispersive Infrared) sensing principle, combined with Sensirion's patented PASens® and CMOSens® technology, to deliver high accuracy at an unmatched price point. The sensor is reflow solderable, enabling cost- and space-effective integration into various applications, offering maximal design freedom.
The SCD4x measures CO2 concentration, temperature, and relative humidity. It operates on the photoacoustic NDIR sensing principle, where CO2 molecules absorb infrared light, causing a pressure wave that is detected by an acoustic transducer. This allows for precise CO2 measurement. An integrated SHT4x humidity and temperature sensor provides on-chip signal compensation, which is crucial for accurate CO2 readings as CO2 concentration is influenced by these environmental factors. The device is designed to be a key component in smart ventilation systems, indoor air quality monitors, and other connected devices, helping to maintain optimal CO2 levels for human cognitive performance and well-being.
CO2 Sensing Performance:
Humidity Sensing Performance:
Temperature Sensing Performance:
Electrical Specifications:
Operation Conditions & Lifetime:
persist_settings: Stores configuration settings (temperature offset, sensor altitude, ASC enabled/disabled) in EEPROM, making them persistent across power cycles.get_serial_number: Reads out a unique 48-bit serial number for chip identification and traceability.perform_self_test: An end-of-line test to check sensor functionality and power supply.perform_factory_reset: Resets all configuration settings and erases FRC/ASC history.reinit: Reinitializes the sensor by reloading user settings from EEPROM.
General| Brand | SENSIRION |
|---|---|
| Model | SCD40-D-R2 |
| Category | Accessories |
| Language | English |
