Combustion byproducts shorten service life. Combustion products generally contain acidic gases such as carbon dioxide (CO₂), nitrogen oxides (NOₓ), and sulfur dioxide (SO₂). As the sensor is filled with alkaline liquid, prolonged operation reduces the pH value of the electrolyte and accelerates lead consumption, thereby shortening the sensor’s lifespan.
Non-compliance with lead-free regulations. Although lead-containing sensors currently enjoy exemptions under RoHS and WEEE directives, the phase-out of lead-based sensors in favor of lead-free alternatives has become an irreversible environmental trend.
Excessive weight and bulky size. Extra lead material is required to extend the service life of traditional sensors, resulting in increased overall weight and volume.
Extended service life. Throughout the chemical reaction process, the high-activity electrodes only serve catalytic oxidation and reduction functions with zero material consumption, eliminating the core issue of anode fuel depletion in traditional lead-oxygen sensors. Its optimized structural design effectively suppresses internal electrolyte volatilization, granting it a far longer service life than conventional oxygen sensors. It can operate stably for more than 5 years within a temperature range of -40℃ to 60℃ and a relative humidity range of 15% to 90%.
Strong resistance to acidic gases. Adopting acidic electrolyte internally, the S+4OXLF effectively resists interference from acidic gases produced by the combustion of natural gas, petroleum, wood, biomass and other fuels, ensuring reliable adaptability across diverse fuel application environments.
Lightweight design. A typical lead-containing oxygen sensor for emission monitoring (e.g., S+5OX/5FO) weighs approximately 40g, while the S+4OXLF weighs merely 5g, offering a distinct weight advantage and laying a foundation for the development of compact, lightweight combustion efficiency analyzers.
Full compliance with RoHS and WEEE standards. Being completely lead-free, the S+4OXLF facilitates instrument manufacturers in obtaining RoHS and WEEE certifications for their products.
Complete technical documentation. We provide customers with comprehensive technical support, including sensor characteristic datasheets, operational principles and reference circuit diagrams, to ensure stable and reliable application.
Online flue gas monitoring instruments. Domestic online oxygen monitoring devices mostly adopt zirconia sensors or partial-pressure lead-oxygen sensors. The latter has a theoretical service life of nearly 5 years, yet frequent fluctuations in intake air temperature and humidity often reduce its actual service life to around one year. Additionally, its weak resistance to high-concentration acidic gases limits its application scope. In contrast, the S+4OXLF operates stably for 5 years regardless of intake temperature and humidity changes and under high-concentration acidic gas conditions, significantly cutting customers’ maintenance costs arising from in-warranty sensor failures, including product replacement and on-site service expenses.
Combustion efficiency analyzers. At present, such analyzers are widely used for combustion efficiency testing of industrial boilers. With the gradual popularization of household boilers, especially the large-scale adoption of condensing boilers, the residential heating market will witness rapid expansion, driving growing market demand for combustion efficiency analyzers and improved monitoring systems. Boiler manufacturers and maintenance service providers are all required to be equipped with professional analysis instruments.
Flue gas analyzers. Most domestic flue gas analyzers feature a bulky cabinet structure, equipped with traditional lead-oxygen sensors and large-sized Series 3 toxic gas sensors. The S+4OXLF serves as an ideal replacement solution, enabling instrument manufacturers to develop thinner, lighter, smaller and more portable analytical devices.
