Product Overview

The ACD3100 is a dual-channel infrared carbon dioxide (CO2) sensor based on the Non-Dispersive Infrared (NDIR) principle. It offers excellent long-term stability, high selectivity, and independence from oxygen. Featuring a dual-channel design for enhanced stability, it provides a standard digital output (I2C/UART) for convenient data access. The sensor is designed for fast response and recovery, with strong anti-interference capabilities. Its accuracy and reliability are ensured by integrated infrared absorption gas detection technology, precise optical path design, and high-precision dual-channel signal detection circuits. The ACD3100 is widely applied in air quality monitoring, fresh air systems, air purifiers, and HVAC equipment, contributing to healthier, more comfortable, and energy-efficient living environments.

Product Attributes

• Brand: ASAIR
• Manufacturer: Guangzhou Aosong Electronics Co., Ltd.
• Technology: Non-Dispersive Infrared (NDIR)
• Design: Dual-channel
• Output Interface: I2C / UART
• Certifications: Not specified (though a warranty is provided)

Technical Specifications

Communication Protocols

I2C Communication

• Speed: Max 100kHz
• CRC: CRC-8 (Polynomial 0x31, Initial Value 0xFF)
• Commands: Read CO2 Concentration, Set/Read Manual Calibration, Set/Read Factory Reset, Read Software Version, Read Sensor ID

UART Communication

• Baud Rate: 1200
• Data Format: 8 data bits, no parity, 1 stop bit
• Protocol Format: Frame Header (FE A6) + Length + Command Code + Data + Checksum (CS)
• Commands: Read CO2 Concentration, Manual (Single-point) Calibration, Factory Reset, Read Software Version, Read Sensor ID

Important Notes

• Do not disassemble the sensor.
• For manual calibration, the sensor must operate continuously in a stable CO2 environment for over 20 minutes.
• Recommended calibration cycle for manual calibration is no more than 6 months.
• Ensure ventilation openings are at least the size of the sensor's inlet/outlet.
• Keep away from heat sources and direct sunlight.
• Avoid use in environments with high dust density.
• Soldering iron temperature should be below 350, with a soldering time less than 3s. Wave soldering is prohibited.
• Recommended installation via a socket for maintenance.
• Factory data is calibrated; third-party instruments are not a standard for comparison. User calibration is possible based on actual measurements.
• PCB has moisture-proof treatment with a coating of at least 0.15mm.

Safety Warning

Do not use this product in safety protection devices, emergency stop equipment, or any application where its failure could lead to personal injury, unless specifically authorized. Refer to the product datasheet and application guide before installation, handling, use, or maintenance. Failure to comply may result in death or serious injury. The company disclaims all liability for such outcomes.

Quality Assurance

Guangzhou Aosong Electronics Co., Ltd. provides a 12-month warranty from the date of shipment for the ACD3100 Dual-channel Infrared Carbon Dioxide Sensor, based on the technical specifications in the datasheet. Free repair or replacement will be provided for confirmed defects within the warranty period. The company is responsible only for defects arising in applications that meet the product's technical conditions and does not guarantee or warrant performance in unadvised special scenarios or when used with non-Aosong components.