5/8-18 Thread Speed Sensor 70085-3030-112 | Industrial RPM Sensor

Description

AI-TEK 70085-3030-112 Speed Sensor – Reliable Magnetic Pickup for Harsh Environments

This sensor delivers stable speed detection for industrial machinery. It works in extreme temperatures from -65°C to 95°C. The 5/8-18 UNF thread ensures easy mounting. Use it for turbines, engines, and gearboxes.

Technical Specifications (MECE Classification)

• Brand & Model: AI-TEK, Part No. 70085-3030-112
• Output Performance
  • Guaranteed Peak-to-Peak Voltage: 13.4 V (P-P)
  • Frequency Response: 0 Hz to 20 kHz (typical magnetic pickup)
  • Sensitivity: 13.4 mV per gauss (nominal)
  • Linearity: ±1% over full range
  • Resolution: 0.1% of full scale
• Environmental & Mechanical Ratings
  • Temperature Range: -65°C to 95°C
  • Environmental Protection: Sealed cable entry, resistant to dust/oil
  • Noise Immunity: High electromagnetic interference resistance
  • Thread Size: 5/8-18 UNF
  • Thread Length: 2.75 inches (69.85 mm)
  • Sensor Body Length: 4 inches (101.6 mm)
  • Conduit Thread: 1/2 NPT
  • Cable Termination: 3 meters (9.84 ft) integral cable
• Certification & Compliance
  • Agency Approval: None (general industrial use)
  • CE compliant for emission standards (refer to manufacturer)

Installation Guide (Quick & Secure)

• Clean the 5/8-18 threaded mounting hole before installation.
• Screw sensor until it touches the target gear tooth, then back off 1/2 turn.
• Tighten locknut to prevent vibration loosening.
• Connect 1/2 NPT conduit for cable protection.
• Do not exceed 95°C operating temperature.

Debugging, Maintenance & Service Convenience

• Check output voltage: no load condition should show 13.4 V P-P minimum.
• Use oscilloscope to verify waveform; clean teeth gap is 0.005″ to 0.015″.
• No periodic maintenance needed – rugged design for long life.
• Easy replacement: same thread size as common industrial sensors.
• Test with multimeter: coil resistance typically 1200 ohms (approx).

Compatibility Notes

• Works with PLCs, tachometers, and frequency counters.
• Output: passive magnetic signal (no external power needed).
• Compatible with standard 1/2 NPT conduits.
• Replaces many legacy AI-TEK and other brand magnetic pickups.
• Target material: ferrous metal gears with 8 to 200 teeth.

Typical Application Scenarios

• Steam and gas turbine speed monitoring.
• Diesel engine RPM sensing for generators.
• Industrial gearbox output speed feedback.
• Conveyor rollers and heavy rotating machinery.
• Pump speed verification in oil & gas plants.
• Marine propulsion systems.

Diagnostic Capabilities & Self-Check

• Built-in coil integrity check: measure DC resistance (900-1500 ohm).
• Signal absence indicates wiring break or gap too large.
• Low voltage output suggests incorrect air gap or target damage.
• Use known speed source for field calibration validation.
• No external diagnostic tool required – simple voltage test works.

Frequently Asked Questions (FAQ) – Practical & Experience-Based

• What is the maximum air gap for reliable output?
  • Keep gap between 0.005″ and 0.020″ for full 13.4 V output.
• Can I cut and extend the cable?
  • Yes, use shielded cable and keep total length under 30 meters. Avoid noise sources.
• Why is my output voltage lower than 13.4 V?
  • Check air gap, target speed, or ferrous material. Slower speeds generate lower voltage.
• Does this sensor require external power?
  • No, it’s a passive variable reluctance sensor. Signal voltage comes from target movement.
• What happens if temperature exceeds 95°C?
  • Internal coil insulation may degrade. Keep within -65°C to 95°C range.
• Can I use this with non-ferrous targets?
  • No, only ferrous metals (steel, iron) generate magnetic field changes.
• How to choose between 70085 series vs other part numbers?
  • This 70085-3030-112 offers 2.75″ thread length and 3m cable. For shorter thread, select other variants.
• Is this sensor suitable for hazardous areas?
  • No explosion-proof certification. Use in non-hazardous locations only.
• Experience: How long does it last in dusty mills?
  • Typical lifetime >5 years due to sealed housing and robust cable.

Selection Guide (How to Pick the Right AI-TEK Sensor)

• Check your existing thread: 5/8-18 matches this model.
• Verify temperature needs: -65 to 95°C suits most industrial floors.
• Ensure target gear is ferrous and tooth module >1 mm.
• For longer cable length, choose other AI-TEK part numbers.
• Need agency approval (ATEX/CSA)? This unit has none – select certified series.
• For subsea or high vibration, request reinforced cable version.

Packing List (What’s Inside)

• AI-TEK 70085-3030-112 Speed Sensor – 1 unit
• Integral 3-meter cable with bare leads – pre-attached
• Installation datasheet (quick start guide)
• No mounting hardware included (use standard 5/8-18 locknut)

Warranty & Shipping Information

• Warranty: 12 months from invoice date. Covers manufacturing defects.
• Express Shipping Carriers: FedEx, UPS, DHL – worldwide tracked delivery.
• Lead time: 2-3 business days for dispatch.
• Return policy: Contact support for RMA within warranty period.

Contact Technical Sales – Quick Support via WhatsApp

• Need selection help or urgent order? Call or message:
  +86 158 8020 0923 (WhatsApp)
• Email inquiries: support@plcdcshub.com (response within 24h)

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