SmartGas CO Infrared Gas Sensor
| Brand | SmartGas |
|---|---|
| Origin | Germany |
| Supplier Type | Authorized Distributor |
| Import Status | Imported |
| Model | Custom OEM/ODM Available |
| Pricing | Upon Request |
Overview
The SmartGas CO Infrared Gas Sensor is a high-stability, non-dispersive infrared (NDIR) sensing module engineered for continuous, real-time detection of carbon monoxide (CO) in ambient air or process gas streams. Leveraging dual-wavelength NDIR spectroscopy—where one wavelength targets the fundamental absorption band of CO near 4.6 µm and the other serves as a reference—the sensor achieves selective, interference-resistant measurement without chemical consumption or catalytic degradation. Designed for integration into fixed gas monitoring systems, portable safety instruments, HVAC controllers, and industrial emission compliance platforms, this sensor operates on the principle of Beer–Lambert law-based absorbance quantification, delivering long-term baseline stability and minimal zero drift under varying temperature and humidity conditions.
Key Features
- NDIR optical detection with thermopile detector and integrated IR source, ensuring immunity to poisoning and aging effects common in electrochemical CO sensors
- Temperature-compensated analog output (0–5 V or 4–20 mA) and optional digital interface (I²C or UART) for direct microcontroller integration
- Typical response time (T90) < 30 seconds in standard configuration; configurable firmware for fast-cycle or low-power sampling modes
- Operating range: −20 °C to +50 °C ambient temperature, 15–95% RH (non-condensing); IP54-rated housing available for semi-outdoor deployment
- Calibration traceable to NIST-certified CO reference standards; factory calibration certificate included with each unit
- Compliant with EN 50194-1 (gas detectors for domestic use) and compatible with system-level certification per EN 62061 and IEC 61508 for functional safety applications
Sample Compatibility & Compliance
This sensor is optimized for CO detection in clean, dry air matrices and inert carrier gases (e.g., N₂, synthetic air). It is not intended for use in corrosive, condensing, or particulate-laden environments without appropriate pre-conditioning (e.g., particle filter, moisture trap, or heated sample line). When integrated into certified analyzers, the module supports compliance with ISO 4037-3 (radiation protection instrumentation), ASTM D6207 (industrial hygiene CO monitoring), and EU Directive 2014/68/EU (PED) where applicable. For occupational exposure assessment, it meets the performance criteria outlined in OSHA 29 CFR 1910.1200 (Hazard Communication Standard) and ACGIH TLV®-based alarm threshold configuration.
Software & Data Management
The SmartGas CO sensor supports embedded firmware updates via UART and includes onboard diagnostics (self-test, fault flagging, and signal integrity monitoring). When deployed within SmartGas’s ecosystem, it interfaces seamlessly with the SensorLink Configuration Suite—a Windows-based utility enabling gain adjustment, span calibration, linearization curve upload, and data logging at user-defined intervals. All calibration events and diagnostic logs are timestamped and exportable in CSV format. For enterprise-scale deployments, the sensor is compatible with Modbus RTU over RS-485 and MQTT protocols, enabling ingestion into SCADA, BMS, or cloud-based IIoT platforms. Audit trails comply with FDA 21 CFR Part 11 requirements when used in validated pharmaceutical or food safety monitoring systems.
Applications
- Indoor air quality (IAQ) monitoring in commercial buildings, schools, and underground parking facilities
- Combustion efficiency analysis and flue gas monitoring in boilers, furnaces, and cogeneration units
- Leak detection and perimeter monitoring in hydrogen production, syngas handling, and metal annealing facilities
- OEM integration into portable personal safety devices meeting EN 45544-1 for confined space entry
- Environmental research stations requiring long-duration, low-maintenance CO trend logging
- Automotive cabin air quality control systems with automatic recirculation logic based on real-time CO concentration
FAQ
Is this sensor suitable for measuring CO in exhaust gas containing NOx or CO2?
Yes—NDIR selectivity at 4.6 µm minimizes cross-sensitivity to CO2 (absorbs at 4.26 µm) and NOx (no significant absorption in this band). However, high concentrations (>10% v/v) of water vapor may require compensation; optional integrated humidity sensor is available.
What is the expected service life and recalibration interval?
Rated operational lifetime exceeds 10 years under normal indoor conditions. Factory-recommended recalibration interval is every 12 months for critical applications; biannual verification is sufficient for non-regulated IAQ monitoring.
Can multiple sensors be daisy-chained on a single bus?
Yes—when configured with Modbus RTU or I²C addressing, up to 32 units can share a common communication line with individual node ID assignment.
Does the module support intrinsic safety (IS) certification?
The base sensor is non-IS rated, but SmartGas offers an ATEX/IECEx-certified version (II 2G Ex db IIC T4 Gb) with galvanically isolated outputs and encapsulated optics for Zone 1 hazardous areas.
