NDIR Dual-Channel CO₂ Sensor Module - MS03-010

The MS03-010 CO₂ sensor module combines non-dispersive infrared (NDIR) sensing with MAXMAC’s patented long-path optical chamber and precision calibration to deliver stable, accurate CO₂ measurements. Its gold-plated enclosure is intended for ventilation controls, indoor air quality monitors, agricultural systems, and industrial environmental monitoring where long-term stability, reliability, and unit-to-unit consistency matter. It is designed for 15+ years of service with minimal maintenance.

  • NDIR dual-channel CO2 detection
  • 400-10000 ppm measuring range
  • 1 ppm resolution
  • ≤20 s response time
  • 15+ year service life for long-term maintenance-free operation
MS03-010 NDIR dual-channel CO₂ sensor module
Sensor Technology Principle
CO2 Sensor Principle Diagram
NDIR CO₂ sensor technology principle diagram
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
Applicable Systems
  • CO2 monitoring for outdoor-air ventilation systems
  • Commercial ventilation controls
  • Indoor air quality monitors
  • Smart building HVAC systems
  • Greenhouse environment monitoring
  • Agricultural CO2 control equipment
  • Livestock housing air monitoring equipment
  • Animal respiration and metabolic monitoring equipment
  • School and office air quality testing
  • Industrial CO2 monitoring equipment
  • Portable CO2 detectors
Applications
Cabin Air Quality / Smart Cockpit

Cabin Air Quality / Smart Cockpit

For automotive HVAC and smart cockpit integrations, the MS03-010 monitors cabin CO₂ levels in real time to support fresh air intake and recirculation control. It helps reduce drowsiness risk caused by elevated CO₂ levels and improves comfort in passenger cars, commercial vehicles, and electric or hybrid vehicles.

Residential and Commercial HVAC

Residential and Commercial HVAC

In residential and commercial HVAC systems, the sensor provides reliable CO₂ feedback for demand-controlled ventilation. Outdoor air intake can be adjusted based on occupancy and indoor air quality, helping maintain comfort while improving energy efficiency.

Fresh Air Ventilation Systems

Fresh Air Ventilation Systems

Outdoor-air ventilation systems can use real-time CO₂ readings as a control input for ventilation rates and air exchange. The dual-channel NDIR design supports stable long-term measurement in continuous operation.

Air Purifiers and IAQ Devices

Air Purifiers and IAQ Devices

Air purifiers, IAQ monitors, and building automation systems can use CO₂ trends to trigger ventilation prompts and support indoor air management. CO₂ data also helps energy management systems balance comfort, ventilation, and operating cost.

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