{"id":4520,"date":"2026-01-21T13:50:06","date_gmt":"2026-01-21T05:50:06","guid":{"rendered":"https:\/\/atfits.com\/?post_type=product&p=4520"},"modified":"2026-01-21T13:50:06","modified_gmt":"2026-01-21T05:50:06","slug":"keyence-fu-31-fiber-optic-sensor","status":"publish","type":"product","link":"https:\/\/atfits.com\/es\/producto\/keyence-fu-31-fiber-optic-sensor\/","title":{"rendered":"Keyence FU-31 Fiber Optic Sensor"},"content":{"rendered":"

Keyence FU-31 Side – Emitting Reflective Fiber Optic Sensor Unit<\/h1>\n
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Product Overview<\/h2>\n
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The Keyence FU-31 is a space – saving side – emitting reflective fiber optic sensor unit, engineered to work seamlessly with Keyence fiber optic amplifiers (like FS – V31P, FS – N41P) for non – contact, high – precision detection in the industrial automation sector. It is particularly well – suited for applications where space is limited, such as detecting tiny electronic components (like gold wires with a diameter of 0.005 mm), inspecting small mechanical parts, and carrying out quality control checks on compact assembly linesKEYENCE INTERNATIONAL (BELGIUM) NV\/SA. This sensor unit has a dual – core fiber design and a side – emitting beam direction, which enables installation in tight spaces that are inaccessible to conventional straight – emitting sensors. The 2 – meter free – cut fiber cable allows for flexible customization to fit specific installation needs, and its durable construction ensures stable performance in harsh industrial environments with extreme temperatures. It offers an ideal solution for enhancing detection accuracy and flexibility in scenarios where traditional sensors struggle to be installed or perform reliablyKEYENCE INTERNATIONAL (BELGIUM) NV\/SA.<\/div>\n
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Main Functions<\/h2>\n
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  1. High – Precision Micro – Object Detection<\/strong>\n
    <\/div>\n

    It can detect ultra – small objects, with the minimum detectable object being a 0.005 mm diameter gold wire when the detection distance and sensitivity are set to their optimal states. This makes it highly suitable for precision tasks like semiconductor lead frame inspection and fine wire bonding detection in the electronics manufacturing industryKEYENCE INTERNATIONAL (BELGIUM) NV\/SA.<\/li>\n

  2. Space – Saving Side – Emitting Detection<\/strong>\n
    <\/div>\n

    The side – emitting beam direction allows the sensor to be mounted in narrow gaps, around machine components, or on the sides of small fixtures. It is perfect for applications where the detection position is constrained by the mechanical layout of the equipment, such as in the internal detection of small – size electronic devices.<\/li>\n

  3. Flexible Installation and Customization<\/strong>\n
    <\/div>\n

    The 2 – meter fiber cable is free – cut, enabling users to adjust the cable length according to the actual installation distance, thus reducing cable clutter and optimizing the sensor layout. The dual – core fiber (\u00f81.0 mm \u00d7 2) ensures efficient light transmission, and the minimum bend radius of R10 mm provides more installation flexibility compared to other fiber sensors with larger bend radius requirementsKEYENCE INTERNATIONAL (BELGIUM) NV\/SA.<\/li>\n

  4. Harsh Environment Adaptability and Amplifier Compatibility<\/strong>\n
    <\/div>\n

    It can operate stably within a wide temperature range of – 40\u00b0C to + 70\u00b0C, making it applicable in high – temperature production processes, cold storage facilities, and outdoor industrial settings. It is fully compatible with Keyence fiber optic amplifiers, which can convert light intensity changes into digital signals for seamless integration with PLCs, HMIs, and other control systems, ensuring reliable signal transmission and processingKEYENCE INTERNATIONAL (BELGIUM) NV\/SA.<\/li>\n

  5. Mutual Interference Suppression<\/strong>\n
    <\/div>\n

    When used in combination with compatible Keyence amplifiers, it can effectively suppress mutual interference when multiple sensors are installed in close proximity. This maintains signal integrity in high – density detection setups, such as on multi – station assembly lines.<\/li>\n<\/ol>\n

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    Technical Features<\/h2>\n
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    \n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
    Feature<\/th>\nDetails<\/th>\n<\/tr>\n<\/thead>\n
    Sensor Type<\/td>\nSide – emitting reflective fiber optic sensor unit<\/td>\n<\/tr>\n
    Beam Emitting Direction<\/td>\nSide<\/td>\n<\/tr>\n
    Fiber Configuration<\/td>\nDual – core (transmission + reception), \u00f81.0 mm diameter \u00d7 2<\/td>\n<\/tr>\n
    Fiber Length<\/td>\n2 m (free – cut)<\/td>\n<\/tr>\n
    Minimum Bend Radius<\/td>\nR10 mm<\/td>\n<\/tr>\n
    Minimum Detectable Object<\/td>\n0.005 mm diameter gold wire (under optimal detection conditions)<\/td>\n<\/tr>\n
    Operating Temperature<\/td>\n– 40\u00b0C to + 70\u00b0C (no condensation)<\/td>\n<\/tr>\n
    Storage Temperature<\/td>\n– 40\u00b0C to + 85\u00b0C<\/td>\n<\/tr>\n
    Housing Material<\/td>\nStainless steel (sleeve part), durable polymer (cable jacket)<\/td>\n<\/tr>\n
    Light Compatibility<\/td>\nOptimized for red LED light sources (640 nm wavelength, compatible with Keyence amplifiers)<\/td>\n<\/tr>\n
    Mechanical Durability<\/td>\nResistant to vibration, shock, and minor chemical exposure, ensuring long – term stable operation<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n
    <\/div>\n
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    <\/div>\n

    Product Dimensions and Weight<\/h2>\n
    <\/div>\n
    \n
    \n\n\n\n\n\n\n\n\n\n\n
    Item<\/th>\nDetails<\/th>\n<\/tr>\n<\/thead>\n
    Fiber Cable Diameter<\/td>\n\u00f81.0 mm \u00d7 2 (dual – core parallel configuration)<\/td>\n<\/tr>\n
    Fiber Cable Length<\/td>\n2 m (free – cut)<\/td>\n<\/tr>\n
    Sleeve Length<\/td>\nStandard compact size for side – mounting<\/td>\n<\/tr>\n
    Weight<\/td>\nApproximately 5 g (including fiber cable and sensor head)<\/td>\n<\/tr>\n
    Mounting Method<\/td>\nSuitable for sleeve – type mounting, compatible with standard brackets and fixtures for side – position installation<\/td>\n<\/tr>\n
    Cable Connector<\/td>\nPre – terminated for direct and secure connection to Keyence fiber optic amplifiers<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    Keyence FU-31 Side – Emitting Reflective Fiber Optic Sensor Unit Product Overview The Keyence FU-31 is a space – saving<\/p>","protected":false},"featured_media":4521,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[86],"product_tag":[],"class_list":{"0":"post-4520","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-86","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"yoast_head":"\nKeyence FU-31 Fiber Optic Sensor - Autofits<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/atfits.com\/es\/producto\/keyence-fu-31-fiber-optic-sensor\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Keyence FU-31 Fiber Optic Sensor - Autofits\" \/>\n<meta property=\"og:description\" content=\"Keyence FU-31 Side – Emitting Reflective Fiber Optic Sensor Unit Product Overview The Keyence FU-31 is a space – saving\" \/>\n<meta property=\"og:url\" content=\"https:\/\/atfits.com\/es\/producto\/keyence-fu-31-fiber-optic-sensor\/\" \/>\n<meta property=\"og:site_name\" content=\"Autofits\" \/>\n<meta property=\"og:image\" content=\"https:\/\/atfits.com\/wp-content\/uploads\/2026\/01\/IMG_20250525_112626.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1000\" \/>\n\t<meta property=\"og:image:height\" content=\"1000\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Tiempo de lectura\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/atfits.com\\\/product\\\/keyence-fu-31-fiber-optic-sensor\\\/\",\"url\":\"https:\\\/\\\/atfits.com\\\/product\\\/keyence-fu-31-fiber-optic-sensor\\\/\",\"name\":\"Keyence FU-31 Fiber Optic Sensor - 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