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The Foxboro 85UVF1A-1QDK3 is a high-performance dual-spectrum flame detector from the Series 2 Type 85UVF/IRF family. This device employs combined ultraviolet (UV) and infrared (IR) sensing technology to detect flames with high accuracy, even in challenging environments with background radiation, sunlight, or hot surfaces. It features a wide detection range, fast response time, and adjustable sensitivity settings to cater to various fire types and distances. The detector is housed in a rugged, corrosion-resistant enclosure rated for harsh industrial conditions, including wide temperature ranges, humidity, and exposure to chemicals. It offers multiple output options (e.g., relay, analog, digital) for integration into fire alarm systems and industrial automation networks. Compliance with international safety standards (e.g., ATEX, IECEx) ensures suitability for hazardous areas. Typical applications include monitoring flare stacks, turbine enclosures, storage tanks, and processing units in industries such as oil and gas, chemicals, and energy. The 85UVF1A-1QDK3 exemplifies Foxboro's commitment to delivering robust and reliable safety solutions for critical industrial infrastructure.