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Sensirion SEN66, STCC4, SCD43, SCD41, SHT40 Sensors
A scalable portfolio of CO2, particulate, gas, humidity and temperature sensors for compliant, energy-efficient IAQ design
Design smarter indoor air quality systems with Sensirion’s proven sensing technologies. From multi-parameter environmental platforms to ultra-compact CO2 and industrial-grade humidity sensors, this portfolio enables accurate monitoring, standards compliance and seamless integration across residential, commercial and industrial applications.
Built on Sensirion’s CMOSens® and PASens® technologies, these sensors deliver reliable performance, low power consumption and production-ready packaging to support high-volume designs while maintaining flexibility for customization.
Features
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Sensor Platforms and Devices
SEN66 Multi-Parameter Environmental Sensing Platform
The SEN66 combines up to nine environmental measurements in a compact, integrated platform. Featuring a miniaturized MEMS-based particulate matter sensor from the SPS6x family, it simplifies system design while reducing cost and integration effort.
Designed for applications requiring compliance with IAQ standards such as RESET®, WELL Building Standard™ and California Title 24, the SEN66 enables accurate, standards-ready monitoring in a single sensing solution.
STCC4 Ultra-Compact CO2 Sensor
STCC4 delivers direct CO2 measurement in one of the smallest form factors available, enabling new IAQ applications previously constrained by size and cost. Based on advanced thermal conductivity sensing, it offers factory calibration, low current consumption and reliable performance for compact electronic designs.
When paired with Sensirion temperature and humidity sensors, STCC4 provides accurate compensation and monitoring of key indoor environmental parameters, making it ideal for high-volume IAQ devices.
SCD43 High-Accuracy CO2 Sensor for Building Standards Compliance
The SCD43 offers best-in-class CO2 accuracy of ±(30 ppm + 3% m.v.) with extended measurement up to 5,000 ppm. Built on photoacoustic NDIR sensing with PASens® and CMOSens® technology, it supports single-shot operation and compatibility with stringent standards including ANSI/ASHRAE 62.1, California Title 24, RESET® grade B and WELL Building Standard™ v2.
This makes SCD43 well suited for advanced building automation and energy-efficient ventilation control.
SCD41 CO2 Sensor with Extended Range and Single-Shot Mode
The SCD41 provides improved CO2 accuracy across a 400 to 5,000 ppm range with single-shot measurement capability. It meets the requirements of WELL Building Standard™, RESET® and California Title 24, offering a balanced solution for IAQ monitoring and smart ventilation applications.
Like the SCD43, it integrates temperature and humidity sensing for on-chip signal compensation and efficient system design.
SHT40I-BD1B Industrial Humidity and Temperature Sensor
The SHT40I-BD1B is part of Sensirion’s fourth-generation SHT4xI platform, designed specifically for challenging industrial environments. With ±2% relative humidity accuracy, enhanced ESD protection and robust housing, it delivers reliable performance under harsh conditions.
Based on CMOSens® technology, the sensor supports seamless integration through its small form factor, wide operating voltage range and I2C digital output, making it a strong choice for industrial and building automation systems.
