The SGX-4CO is an industrial carbon monoxide (CO) sensor designed for detecting and measuring CO concentrations in harsh environments. It features a measurement range of 0–2000 ppm with a linear output signal of 70 ± 20 nA/ppm and a T90 response time of less than 30 seconds, enabling rapid detection of CO presence. The sensor operates reliably across a temperature range of -30°C to +50°C and pressure range of 800–1200 mbar, with an operating humidity range of 15–90% RH, and demonstrates excellent repeatability of ±2 ppm CO equivalent. With a filter capacity exceeding 20,000 ppm hours and an expected operating life greater than 24 months in air, the SGX-4CO is well-suited for industrial safety monitoring, building automation systems, and portable gas detection instruments where reliable CO measurement and long-term stability are essential.