EH-290 Keyence F90 Series Unshielded Proximity Sensor Head

Executive Summary & Inductive Sensing Core

The EH-290 unshielded sensor head from the F90 series by Keyence engineers long-range ferrous metal detection for heavy automated machinery. Built with a robust cylindrical housing design, this non-shielded inductive unit expands target sensing envelopes up to 70 mm. Automation technicians deploy this high-performance component to monitor large structural components and high-speed moving metal targets reliably.

Comprehensive Technical Parameters Matrix

Advanced Operational Features & Functional Highlights

• Extended Unshielded Range: Non-shielded coil geometry projects a wider electromagnetic field to achieve deep 70 mm maximum detection horizons.
• High Repeatability Precision: Maintains a strict 0.075 mm repeatability threshold to ensure exact positioning triggers on repetitive machine cycles.
• Harsh Environment IP67 Build: Fully sealed against cutting fluids, water jets, and heavy dust accumulation on industrial shop floors.
• Integrated Cabling Design: Ships pre-wired with a durable 3-meter cable harness and heavy-duty metal mounting nuts for secure installation.

Target Industrial Equipment & Application Scenarios

• Stamping & Press Machines: Detects large steel plate entries and confirms die seating clearances before punch cycles initiate.
• Automotive Transfer Lines: Tracks heavy engine blocks and transmission housings moving along high-speed roller skids.
• Heavy Material Handling Lifts: Monitors platform limits and pallet positioning stops on automated freight elevators.

Built-In Diagnostic & Fault Monitoring Capacities

• Thermal Drift Threshold Tracking: Designed to restrict baseline sensitivity shifts within ±10% across extreme -10 °C to +60 °C operational swings.
• Target Size Validation: Requires standard 150 x 150 mm iron plates for baseline calibration to prevent false triggers from surrounding metal frames.

Global Logistics & Warranty Assurance

• Fulfillment Window: Guaranteed rapid dispatch within 24 to 48 hours of order confirmation.
• Courier Partners: Secure international air freight routing via FedEx, UPS, and DHL.
• Warranty Protection: Fully covered by a comprehensive 12-month operational replacement warranty.

Global PLC Spare HUB's Insight & Field Experience

Because unshielded proximity heads project magnetic fields out of their sides as well as their tips, installing them too close to surrounding steel mounting plates will cause perpetual false triggering. During a recent heavy press line overhaul, countersinking the EH-290 with proper metallic clearance zones eliminated erratic input blips entirely. Field engineers must always adhere to unshielded lateral clearance guidelines to preserve the full 35 mm stable sensing window.

Frequently Asked Questions

Why must unshielded sensor heads like the EH-290 be installed with specific metal clearance gaps?
Unshielded coils radiate magnetic flux laterally; mounting them flush inside surrounding iron brackets will cause the metal wall to act as a permanent target.

How does targeting nonferrous metals such as aluminum alter the maximum detection distance?
Nonferrous materials reduce effective eddy current induction, which shrinks the maximum sensing threshold compared to standard iron targets.

What purchasing criteria should guide my selection when upgrading from a shielded sensor model?
Verify that your mounting bracket layout has sufficient radial clearance to accommodate the unshielded side-sensing field without triggering false alarms.

How can maintenance personnel verify if thermal expansion is causing positional signal drift?
Check the amplifier LED indicator status while the machine is cold versus fully warmed up to ensure target engagement remains well within the 0 to 35 mm stable zone.

What precautions protect the 3-meter integrated cable during high-flex robot arm movements?
Route the cable through flexible drag chains and use strain-relief fittings to prevent repetitive bending stress from damaging the internal wire conductors.

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