Optional Range to 10% Vol
Designed for both ppm-level and percentage-level carbon-dioxide measurement.
MH-411D Industrial NDIR CO2 Sensor
The MH-411D is a compact cylindrical NDIR CO2 sensor for industrial process control, safety equipment, HVAC and agricultural applications. It supports optional ranges up to 10% vol, UART and 0.4–2 V output and fast response below 30 seconds.
BrandWinsen
Sensing PrincipleNDIR
Target GasCO2
Product TypeIndustrial NDIR CO2 Sensor
CO2 Sensing for OEM Integration
Product Overview
Industrial carbon-dioxide measurement in a compact IP54 cylindrical package.
The sensor uses non-dispersive infrared technology to provide selective, oxygen-independent CO2 measurement with internal temperature compensation.
Its safety-barrier power requirement and intrinsic-safety terminal parameters support appropriate protected industrial instrument designs.
Designed for Reliable Integration
Key Features
Fast Response
T90 response time is specified below 30 seconds.
UART and Analog Output
Provides UART communication and a 0.4–2 V analog signal.
Compact Cylindrical Housing
The package measures Ø20 × 22.2 mm.
IP54 Protection
The official specification lists an IP54 defense grade.
Temperature-compensated NDIR
Built-in temperature sensing supports stable linear CO2 output.
Typical Use Cases
Applications
Industrial Process Control
Safety Protection Equipment
HVAC and Refrigeration
Agricultural Monitoring
Animal Husbandry
Official Product Parameters
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | MH-411D |
| Detected Gas | Carbon dioxide (CO2) |
| Detection Principle | Non-dispersive infrared (NDIR) |
| Detection Range | 0–10% vol optional |
| Standard Range Options | 0–2000 ppm; 0–6000 ppm; 0–1% vol; 0–3% vol; 0–5% vol |
| Accuracy | ±(50 ppm + 5% of reading) |
| Working Voltage | 3.6–5 V DC; safety-barrier power required |
| Average Current | <85 mA |
| Interface Level | 3.0 V |
| Output Signal | UART; 0.4–2 V analog, safety-barrier power required |
| Warm-up Time | 3 min |
| Response Time | T90 <30 s |
| Operating Temperature | -20°C to +60°C |
| Operating Humidity | 0–95% RH, non-condensing |
| Dimensions | Ø20 × 22.2 mm |
| Weight | 35 g |
| Expected Lifespan | >5 years |
| Protection Grade | IP54 |
| Intrinsic-safety Terminal Parameters | Ui=7.5 V DC; Ii=265 mA; Pi=0.5 W; Ci=10 μF; Li=0 mH |
Specifications are based on the official Winsen product page. Confirm the latest datasheet, communication protocol, calibration requirements and mechanical drawing before final product design.
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