SmartGas SO2F2 Infrared Gas Sensor

Overview

The SmartGas SO2F2 Infrared Gas Sensor is a high-selectivity, non-dispersive infrared (NDIR) detection module engineered for continuous, real-time monitoring of sulfuryl fluoride (SO₂F₂) concentration in ambient air or process streams. Leveraging dual-wavelength NDIR spectroscopy centered at the characteristic absorption band near 10.6 µm, this sensor achieves robust discrimination against common interferents—including CO₂, CH₄, and SF₆—without cross-sensitivity drift under varying humidity or temperature conditions. Designed for integration into fixed gas detection systems, fumigation safety monitors, and industrial hygiene instrumentation, it complies with fundamental performance expectations outlined in IEC 60079-29-1 (Explosive Atmospheres – Gas Detectors) and supports functional safety requirements aligned with SIL 2 architecture when deployed in certified system configurations.

Key Features

• NDIR optical detection principle with thermopile-based detector and integrated reference channel for automatic baseline compensation
• Measurement range: 0–50 ppm (standard), extendable to 0–500 ppm upon calibration configuration
• Typical resolution: ≤0.1 ppm; repeatability: ±2% of reading (within 20–80% span)
• Operating temperature range: −10 °C to +50 °C; relative humidity tolerance: 15–95% RH (non-condensing)
• Response time (T90): <30 seconds in standard flow conditions (0.5 L/min)
• 4–20 mA analog output with HART® protocol support; optional RS-485 Modbus RTU interface
• IP65-rated housing with stainless steel inlet fitting and PTFE-coated optical path components
• Zero and span calibration capability via external gas ports or software-triggered internal sequence

Sample Compatibility & Compliance

The sensor is validated for use in clean, dry, non-corrosive gas matrices typical of structural fumigation environments, warehouse air monitoring, and post-fumigation clearance verification. It is not intended for direct installation in high-particulate, high-acid-vapor, or solvent-saturated streams without upstream filtration (e.g., sintered stainless steel particulate filter + chemical scrubber for halogenated hydrocarbons). Regulatory alignment includes conformance with EN 50104 (Gas detectors – Oxygen and toxic gas detectors) for electrical safety and EMC, and design traceability to ISO 17025 principles for measurement uncertainty estimation. Documentation packages include full calibration certificates traceable to PTB (Physikalisch-Technische Bundesanstalt) reference standards.

Software & Data Management

The sensor operates as a standalone transducer but integrates natively with SmartGas’ GDS-Manager™ configuration and diagnostics suite (Windows-based, v3.2+). This software enables remote zero/span adjustment, real-time signal visualization, alarm threshold configuration (with latching/non-latching options), and audit-log export compliant with GLP and FDA 21 CFR Part 11 requirements—including electronic signature support, user access levels, and immutable event timestamping. Raw analog output signals are compatible with third-party SCADA, DCS, and BMS platforms supporting 4–20 mA input modules with HART multiplexing capability.

Applications

• Residual SO₂F₂ monitoring during and after structural fumigation of grain storage facilities, museums, and archival repositories
• Occupational exposure assessment in pest control operations per OSHA PEL (0.5 ppm TWA) and ACGIH TLV® (0.5 ppm STEL)
• Process gas verification in semiconductor etching tool exhaust lines where SO₂F₂ serves as an etchant precursor
• Environmental compliance reporting for fumigant emissions under EPA FIFRA Section 6(a)(2) data submission protocols
• Integration into portable multi-gas analyzers for field-deployable fumigation safety verification kits

FAQ

Is this sensor suitable for use in explosion-hazardous areas?
Yes—when installed within an ATEX/IECEx-certified enclosure (e.g., SmartGas EX-Housing Kit Type II 2G Ex db IIB T4 Gb), the sensor meets Zone 1 classification requirements.
Does the sensor require periodic recalibration?
Recommended recalibration interval is every 6 months under continuous operation; annual verification is acceptable under low-duty-cycle applications with documented stability checks.
Can the sensor be exposed to condensation or liquid ingress?
No—condensation on optical surfaces causes signal attenuation and long-term drift; installation must ensure dew point margin ≥5 °C below ambient operating temperature.
What documentation is provided with shipment?
Each unit ships with EU Declaration of Conformity, factory calibration report (including zero/span values, sensitivity factor, and uncertainty budget), and technical datasheet in English PDF format.
Is firmware upgrade supported in-field?
Yes—via USB-to-serial adapter and GDS-Manager™; firmware updates preserve all user-configured parameters and calibration coefficients.