AI-TEK 70085-1010-289 Mini Speed Sensor | 10-32 Thread, -73°C to 150°C

AI-TEK 70085-1010-289 Speed Sensor

10-32 thread | Ultra-wide temp -73 to 150°C | Tiny size for tight spots

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Quick Overview

The AI-TEK 70085-1010-289 is a miniature magnetic speed sensor. It fits very tight spaces. Use it with gear teeth or rotating targets. This model has a 10-32 thread and short 1.25 inch length. No external power is needed. It generates its own AC voltage. Works from -73°C up to 150°C.

Technical Specs – Tree View

• ▶ Basic Identity
  • Brand: AI-TEK
  • Model: 70085-1010-289
  • Series: Magnetic Pickup Speed Sensor
  • Type: Passive variable reluctance
• ▶ Mechanical Dimensions
  • Thread size: 10-32 UNF
  • Thread length: 1.25 inches
  • Total sensor length: 1.25 inches (very compact)
  • Net weight: 1 ounce max (lightest model)
  • Lead length: 18 inches (45.7 cm) with stripped ends
• ▶ Electrical Ratings
  • Standard output: 6 V (peak-to-peak)
  • Guaranteed output: 0.3 V P-P at low speed / larger gap
  • DC resistance: 50 ohms max (very low)
  • Typical inductance: 2 mH reference
  • Output polarity: White lead positive
• ▶ Environmental Endurance
  • Operating temp: -73 to +150 °C
  • Storage temp: -73 to +232 °C (short term)
  • Agency approval: None (general industrial use)
  • Sealing: Not submersible – use in dry areas

How to Install

• Clean the 10-32 threaded hole before screwing the sensor.
• Screw in until it touches the gear tooth. Then back off 1/4 turn.
• Set air gap between 0.020 to 0.045 inches for best signal.
• Tighten lock nut gently – do not exceed 4 Nm torque.
• Connect white lead to positive input of your speed monitor.
• Black lead is common or ground.
• Keep wire away from power cables to avoid electrical noise.

Diagnostics & System Match

• Use an oscilloscope to check output waveform. A clean sine wave means good target.
• Measure DC resistance across leads. Should be below 50 ohms. Higher value means damaged coil.
• Very low output? Reduce air gap or check gear material (must be ferrous steel).
• Works with any PLC high-speed counter or tachometer module.
• Compatible with Allen-Bradley, Siemens, ABB, Honeywell counters.

What You Get & Warranty

• 1 x AI-TEK 70085-1010-289 speed sensor with 18-inch wire leads.
• Quick installation guide sheet.
• 12-month warranty against factory defects. Does not cover wrong installation or physical abuse.
• Shipping via FedEx, UPS, DHL express worldwide. Tracking number provided.
• Typical delivery: 3-6 business days for stocked items.

Where to Use

• Small engine RPM sensing
• High-temperature turbine monitoring (up to 150°C)
• Gearbox speed feedback in tight compartments
• Test stand speed measurement
• Cooling fan speed verification

Frequently Asked Questions (FAQ)

• Q1: What is the smallest target size for this 70085-1010-289 sensor?
  A: It works well with gear teeth as small as 24 pitch (DP). For very small teeth, use a tighter air gap below 0.030 inch.
• Q2: Can I use this sensor near strong magnetic fields?
  A: Yes, but external DC magnetic fields may affect output. Keep at least 2 inches away from large permanent magnets.
• Q3: How do I extend the 18-inch leads?
  A: Use shielded twisted-pair cable and solder the joints. Keep total length under 100 meters. Do not run near variable frequency drives.
• Q4: This model vs 70085-1010-424 – which one to pick?
  A: Choose 70085-1010-289 for tiny spaces (1.25″ length) and high temp needs. Choose 424 for larger thread 5/8-18 and connector style.
• Q5: What if my speed monitor needs a 5V TTL signal?
  A: The 6V output works directly. But at very low speed, voltage drops below 0.3V. Add a signal conditioner for zero-speed detection.

Expert Buying Advice

• Thread length check: 1.25 inches suits shallow mounting holes. For deeper housings, pick a longer thread version.
• Temperature needs: This sensor handles -73 to 150°C. Great for ovens or cold storage.
• Lead termination: Wires are more flexible than connectors. Easy to route through small conduits.
• Output guarantee: 0.3V P-P minimum ensures compatibility with sensitive instruments.
• Warranty advantage: Our 12-month coverage protects your investment. Keep the original packing for any claim.
• Shipping choice: FedEx for fast delivery, UPS for customs-friendly, DHL for Europe priority.