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NDIR Dual-Channel CO2 Sensor Module - MS03-010

The MS03-010 CO? sensor module uses non-dispersive infrared technology (NDIR), combined with MAXMAC’s patented long optical path chamber structure and precise calibration algorithm. With unified calibration on our self-developed high-precision calibration system, the sensor delivers excellent accuracy and reliability. With a maintenance-free service life of over 15 years, this module is designed for easy integration into products and is widely used in ventilation control for energy savings and indoor air quality improvement, bio-related process monitoring for higher yield and economic value, and personal safety applications.

  • Automotive-grade design for demanding operating conditions
  • High-accuracy detection for wide-range applications
  • Long-life structure for maintenance-free operation
S01 Sensor
Sensor Technology Principle
CO2 Sensor Principle Diagram
CO2 Sensor Technology Principle Illustration
Technical Specifications
CO2 Sensor Module
Measured Gas
Carbon dioxide CO2
Measurement Principle
Non-dispersive infrared (NDIR)
Range
400-10000 ppm / other customized ranges
Resolution
1 ppm
Measurement Interval
4 seconds
Accuracy
Note 1
400-3000 ppm: +/- (50 ppm + 3% of reading)
Other ranges: +/- (50 ppm + 5% of reading) or +/-5%
Pressure Dependence
Note 2 +1.6% of reading / kPa
Warm-up Time
15 seconds
Response Time t63%
<20 seconds
Service Life
≥ 15 years
Operating Voltage
4.5V DC - 6.5V DC
Operating Current
Peak 300 mA (<10 ms/cycle), average 15 mA
Sleep Current
<100 µA (sleep disabled by default; enabled via protocol)
Operating Temperature
0°C - 50°C
Operating Humidity
5%-95%RH, non-condensing, dew point 40°C
Storage Temperature
-30°C - 70°C
Dimensions
30 mm × 20 mm × 9.7 mm
Weight
Approx. 5 grams
Communication
Interface and Output
UART (Modbus-compatible, expandable to RS485), PWM output
Maintenance
Requirements
Maintenance-free in normal applications when ABC is enabled
Applications
In-Vehicle Air Purification / Intelligent Cockpit

In-Vehicle Air Purification / Intelligent Cockpit

For automotive HVAC systems and intelligent cockpit applications, this automotive-grade NDIR CO? sensor module monitors in-cabin CO? concentration in real time for intelligent fresh-air control and automatic recirculation adjustment. It helps prevent fatigue and drowsiness caused by CO? buildup, improving driving comfort and safety for passenger cars, commercial vehicles, and new energy vehicles.

Residential/Central Air Conditioning

Residential/Central Air Conditioning

Suitable for CO? monitoring in residential and commercial central air conditioning systems, with real-time data feedback for intelligent fresh-air system control. Ventilation volume can be adjusted automatically based on occupancy and indoor air conditions to maintain air quality while improving energy efficiency.

Fresh Air System

Fresh Air System

Used in residential and commercial fresh-air systems to monitor indoor CO? concentration in real time as a key basis for ventilation control. Dual-channel NDIR technology ensures long-term stable output and supports continuous operation in high-reliability applications.

Air Purifier

Air Purifier

Suitable for air purification equipment and intelligent building control systems, with dynamic monitoring and analysis of indoor CO? concentration. It can serve as a core IAQ parameter to support energy management and environmental optimization strategies.

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