AI-TEK 70085-1010-018 Speed Sensor | 40V P-P Magnetic Pickup

High-output passive magnetic pickup for heavy-duty speed sensing. Reliable in engines, turbines, and gearboxes. Operates from -55°C to 107°C. Output voltage reaches 40V peak-to-peak.

Description

• AI-TEK 70085-1010-018 belongs to the 70085 series. It is a passive variable reluctance sensor.
• Creates AC voltage without external power. Output polarity: Pin B positive.
• Thread size 5/8-18 UNF. Thread length exactly 3.625 inches (92.1 mm).
• Total sensor length 4.75 inches. Lightweight: max 5 oz.
• Typical inductance 33 mH, DC resistance ≤130 ohms. Provides clean signal at low speed.

Technical Data

• Brand: AI-TEK
  • Model: 70085-1010-018
  • Series: High-output magnetic pickup
• Output Performance
  • Standard output: 40 V (P-P)
  • Guaranteed output at low speed: 3.4 V (P-P)
  • Output polarity: Pin ‘B’ positive
• Electrical Characteristics
  • DC Resistance: 130 Ω max
  • Typical Inductance: 33 mH reference
  • Passive design – no external supply needed
• Mechanical Dimensions
  • Thread Size: 5/8-18 UNF
  • Thread Length: 3.625 in (92.1 mm)
  • Sensor Length: 4.75 in (120.6 mm)
  • Net Weight: 5 oz max (142 g)
  • Termination: Connector type (not pigtail)
• Environmental & Durability
  • Operating Temperature: -55°C to +107°C (-67°F to 225°F)
  • Hermetically sealed construction – resists moisture and oil mist
  • High immunity to EMI/RFI (passive magnetic principle)
  • Vibration resistant, suitable for industrial engines
• Measurement & Response
  • Frequency response: 0 Hz to 20 kHz (dependent on gear tooth)
  • Sensitivity: 3.4 V P-P guaranteed at specified air gap and speed
  • Linearity: excellent from near-zero to high RPM
  • Resolution: detects single ferrous targets

Installation Guide

• Use 5/8-18 UNF threaded hole. Apply thread locker for high vibration.
• Set air gap between sensor tip and gear tooth: 0.005 to 0.015 inch (0.13–0.38 mm).
• Torque sensor gently: max 15 Nm (11 lb-ft). Avoid overtightening.
• Connect mating connector per polarity: Pin B positive to signal high side.
• Shielded cable recommended for long runs to reduce noise.

Commissioning & Maintenance

• No calibration needed. Verify output with oscilloscope at low speed (≥200 RPM).
• Clean sensor tip from metal debris yearly. Use soft cloth.
• Check connector for corrosion. Dielectric grease extends life.
• Replace if output drops below 3.4 V P-P at specified speed and gap.

Compatibility Notes

• Works with any AC-coupled speed monitor: PLC, tachometer, overspeed protection.
• Direct replacement for AI-TEK 70085-1010 variants and many competitive sensors.
• Compatible with ferrous targets: gears, keyways, or drilled holes (60–120 teeth).
• Not for zero-speed detection below 30 RPM without signal conditioner.

Certification & Agency Approval

• Agency Approval: None (general industrial use)
• RoHS compliant by design. Not hazardous substances.
• CE marked for electromagnetic compatibility (self-declaration).

Packing List

• 1 x AI-TEK 70085-1010-018 speed sensor with connector.
• 1 x installation datasheet (printed QR code).
• 1 x protective cap for threads.

• Warranty: 12 months from delivery date. Covers manufacturing defects only.
• Free replacement for valid claims. Excludes misuse or improper gap.

Shipping Options

• FedEx Priority – 2-4 business days worldwide.
• UPS Worldwide Express – tracking & insurance included.
• DHL International – economic & fast delivery for most regions.
• All shipments include real-time tracking number.

Typical Applications

• Speed monitoring for industrial diesel/gas engines.
• Turbine overspeed detection (steam, gas, hydro).
• Conveyor belt RPM measurement and gearbox speed.
• Pump shaft speed feedback for automation systems.
• Railway and mining equipment rotational sensing.

Diagnostic Capability

• Simple AC voltage test: output > 3.4 V P-P guarantees function.
• Check DC resistance between pins: should be below 130 ohms (open circuit = failure).
• Use oscilloscope to see clean sine wave; missing teeth cause dropouts.
• Visual thread and connector inspection prevents most errors.

Frequently Asked Questions

• Q: Can I use this sensor with a 5V logic input?
  A: Not directly. The output AC voltage varies with speed. Use a signal conditioner or threshold relay.
• Q: What is the minimum target speed for 3.4V guarantee?
  A: Typically 200 RPM with 60-tooth gear, 0.010″ gap. Slower speeds produce lower voltage.
• Q: Does it work underwater?
  A: No, IP rating not specified. Avoid submersion. Oil splash is acceptable.
• Experience-based Q: My output seems low. What should I check?
  A: Increase gap to 0.008″ or clean debris. Check gear material (only ferrous steel).
• Selection Guidance Q: Should I choose passive or active sensor?
  A: Choose passive (this model) for high temperature, no power wiring. Choose active for zero-speed.
• Q: Replacement for obsolete 70085-1010-008?
  A: Yes, 70085-1010-018 has longer thread 3.625″ – verify thread depth.

Selection Guidance

• If ambient temperature exceeds 107°C, choose high-temp variant (not this model).
• For exposed connectors, order mating cable part number 70085-AC01.
• For very low speed (<30 RPM), use active Hall sensor instead.
• Thread length 3.625” fits deep mounting holes. Confirm housing depth.
• Lightweight 5 oz ideal for engine mounts without stress.

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