Sulfuryl fluoride is a key agent used in the fumigation and pest control of import and export goods. Precise concentration control is critical throughout the entire operational chain: if the application concentration is too low, the pest control efficacy is significantly compromised; conversely, if residual concentrations remain too high, personnel opening the containers face health risks. However, traditional rapid detection methods often lack sufficient anti-interference capabilities in complex gas environments, and their detection accuracy and stability struggle to meet customs quarantine compliance standards—creating a major bottleneck for efficient fumigation oversight.

　　To address this challenge, Yiyuntian Eranntex has developed an infrared detector specifically designed for the targeted detection of sulfuryl fluoride, utilizing Non-Dispersive Infrared (NDIR) absorption spectroscopy technology. Tailored for typical operational environments such as customs containers and fumigation warehouses, the device accurately covers the entire process—from monitoring application concentrations to verifying residual levels before opening containers—thereby providing stable, reliable, and compliant end-to-end detection support for customs quarantine and supervision.

　　1. Background:

　　During routine quarantine and supervision, customs authorities must monitor sulfuryl fluoride application concentrations in real-time during the fumigation of import and export goods. Additionally, safety checks for residual sulfuryl fluoride concentrations within containers and warehouses are required after fumigation is complete but before container opening operations begin. These measures aim to ensure the effectiveness of fumigation treatments while safeguarding on-site personnel and the environment, ensuring compliance with quarantine industry standards (such as SN/T 3401-2012) regarding post-fumigation residual concentrations in the air (≤20.9 mg/m³, or approximately 5 ppm). 

　　2. Parameter Requirements:

　　The equipment must meet the following core parameters for the two stages of the process: fumigation process control and post-fumigation residual safety testing:

　　3. Solution:

　　A "dual-device collaborative" approach (covering both high and low measurement ranges) is adopted to meet testing needs at different stages:

　　1. Fumigation Process Monitoring: A high-concentration infrared analyzer (range: 0–200 g/m³) is used during the fumigation application phase. It employs pump-based sampling via ports on the container or fumigation chamber to provide real-time concentration readings, ensuring the applied concentration meets process specifications.

　　2. Residual Concentration Testing: After the mandated ventilation period, a high-sensitivity residual detector (range: 0–1,000 ppm or 0–100 ppm) is used to measure low concentrations inside the container, on cargo surfaces, and in the work environment. If the reading is below 5 ppm (approximately 20.9 mg/m³), the environment is deemed safe for container opening operations.

　　Technical Principle: All devices utilize Non-Dispersive Infrared (NDIR) absorption spectroscopy technology, which offers specific selectivity for sulfuryl fluoride.

　　4. Matched Products:

　　1 x Sulfuryl Fluoride Concentration Infrared Analyzer: PTM600-SO2F2-NDIR (0–200 g/m³, 0.1 g/m³ resolution)

　　1 x Sulfuryl Fluoride Residual Infrared Detector: PTM600-SO2F2-NDIR (0–100 ppm, 1 ppm resolution)

　　The practical application of Yiyuntian Eranntex infrared sulfuryl fluoride detection equipment in frontline customs quarantine operations—leveraging highly selective infrared technology—fundamentally eliminates data distortion issues caused by cross-gas interference often found in traditional rapid testing methods. This breakthrough not only provides a reliable, quantitative method to verify the effectiveness of fumigation-based pest control but also proactively mitigates health risks for frontline personnel, achieving the dual assurance of effective pest elimination and worker safety.

　　Looking ahead, Yiyuntian Eranntex will closely align with the practical requirements of customs quarantine operations. The company will focus on overcoming challenges—such as the interference of complex in-container temperature, humidity, and multi-gas environments with detection performance—while continuously enhancing equipment response speed and long-term stability. By delivering customized gas detection solutions tailored to the pace of field operations, Yiyuntian Eranntex aims to provide a sustained technological driving force for the precision and efficiency of import-export quarantine and regulatory oversight.