KEYENCE FU-85Z Chemical Resistant Liquid Level Fiber Sensor
The FU-85Z is a specialized thrubeam fiber optic sensor head from Keyence, specifically designed for non-contact liquid level detection. Encased in a PFA (Fluorocarbon Resin) jacket, this sensor head is built to survive in the harshest chemical environments. Whether you are monitoring acids, bases, or ultrapure chemicals in the semiconductor or pharmaceutical industries, the FU-85Z provides a reliable, maintenance-free solution for detecting the presence or absence of liquids through a tube or within a tank.
FU-85Z Technical Specifications
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Part Number: FU-85Z
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Type: Liquid Level Detection (Thrubeam)
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Fiber Material: Plastic with PFA Fluorocarbon Resin Coating
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Fiber Unit Length: 2.0 m (Free-cut)
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Minimum Bend Radius: R40 mm
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Ambient Temperature: -40 to +70 °C (-40 to 158 °F)
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Minimum Detectable Object: Optimized for liquid meniscus detection
Built for Harsh Chemical Environments
The standout feature of the Keyence FU-85Z is its superior chemical resistance. The PFA coating ensures that the fiber unit does not degrade or react when exposed to aggressive industrial fluids.
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Non-Contact Detection: By mounting the FU-85Z on the outside of a transparent or semi-transparent tube (like PFA or Teflon tubing), you can detect the liquid level without the sensor ever touching the fluid, preventing contamination.
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Stable High-Power Sensing: When paired with a MEGA-power amplifier (like the FS-N series), the FU-85Z can penetrate through thick-walled tubing or condensation to provide a stable «on/off» signal.
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Customizable Installation: The 2-meter «free-cut» fiber allows for flexible routing through complex machinery, ensuring a perfect fit for any cabinet-to-tank configuration.
Common Industrial Applications
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Semiconductor Wet Benches: Monitoring chemical levels in wafer cleaning and etching equipment.
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Chemical Dispensing Systems: Detecting the «empty» state in supply lines to prevent air bubbles in the process.
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Pharmaceutical Filling: Ensuring precise liquid levels in high-purity glass or plastic containers.
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Automated Waste Tanks: High-level alarm sensing for industrial waste collection systems.
