Product Overview
The SX-GCO2NSA Series is a compact NDIR carbon dioxide sensor for detecting CO₂ in air. It operates without oxygen dependency and integrates temperature compensation for stable long-term performance. The sensor combines infrared absorption measurement, micro-machined construction, and optimized circuit design to provide reliable CO₂ measurement in a compact package.
Main Features
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High Sensitivity & High Resolution —— Precise detection across the measurement range
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Low Power, Fast Response —— Quick response with low power consumption
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Multiple Output Options —— UART and analog voltage output available
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Temperature Compensation —— Built-in compensation with excellent linear output
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Excellent Stability —— Consistent long-term performance
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Poisoning & Humidity Resistant —— Resistant to water vapor interference and poisoning, long service life
Product Application
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HVAC & Indoor Air Quality Monitoring
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Industrial Process & Safety Monitoring
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Agriculture & Livestock Production Monitoring
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Technical Data
| Measurement | |
| Model | SX-GCO2NSA |
| Detection Principle | Non-dispersive infrared (NDIR) |
| Detection Gas | Carbon dioxide (CO₂) |
| Detection Range | 0–5000 ppm / 0–5% Vol / 0–10% Vol / 0–20% Vol / 0–50% Vol / 0–100% Vol |
| Temperature Compensation | Built-in |
| Accuracy & Resolution | |
| 0–5000 ppm Range | 10 ppm resolution; ±(50 ppm + 5% of reading) accuracy |
| 0–5% Vol Range | 0.01% Vol resolution; ±(0.05% Vol + 5% of reading) accuracy |
| 0–10% Vol Range | 0.01% Vol resolution; ±(0.05% Vol + 5% of reading) accuracy |
| 0–20% Vol Range | 0.1% Vol resolution; ±(0.05% Vol + 5% of reading) accuracy |
| 0–50% Vol Range | 0.1% Vol resolution; ±(0.05% Vol + 5% of reading) accuracy |
| 0–100% Vol Range | 0.1% Vol resolution; ±(0.05% Vol + 5% of reading) accuracy |
| Response | |
| Warm-up Time | 1 min |
| Response Time | T90 ≤ 30 s |
| Output & Communication | |
| Output Type | UART and 0.4–2 V analog voltage |
| Interface Level | 3.0 V |
| Communication Protocol | Modbus RTU |
| Physical Interface | TTL232, TTL-level UART |
| Baud Rate | 9600 |
| Data Format | 8 data bits / 1 stop bit / No parity |
| Default Address | 0xFF |
| Power | |
| Supply Voltage | 3.6–5.5 V DC |
| Average Current | < 60 mA |
| Intrinsic Safety | |
| Protection Type | Intrinsic safety |
| Explosion Protection Marking | Ex ia I Ma |
| Maximum Input Voltage / Current | Ui 5.5 V / Ii 125 mA |
| Maximum Input Power | Pi 0.172 W |
| Internal Capacitance / Inductance | Ci 10.92 µF / Li 0 µH |
| Environmental Conditions | |
| Operating Temperature | −20°C to +60°C |
| Operating Humidity | 0–95% RH, non-condensing |
| Ingress Protection | IP54, according to IEC 60529 |
| Mechanical Data | |
| Dimensions |
Ø20 × 21.4 mm |
| Weight | 35 g |
| Housing Dimension Tolerance | ±0.2 mm |
| Number of Pins | 5 |
| Service Life | |
| Service Life |
> 5 years |
| Recommended Calibration Interval | 6 months |
Certifications & Compliance
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