AI-TEK 70085-3030-222 Speed Sensor | 3/4-20 Thread, 13.4V Output

Heavy-duty passive sensor for speed monitoring in harsh environments. Thread 3/4-20 UNEF-2A. Withstands -65°C to 95°C.

📊 Technical Specifications (Hierarchical)

• Brand & Model
  • Brand: AI-TEK
  • Part Number: 70085-3030-222
  • Series: 70085 high-output magnetic series
• Physical Thread & Mounting
  • Thread Size: 3/4-20 UNEF-2A
  • Thread Length: 2.75 inches
  • Sensor Total Length: 4 inches
  • Conduit Thread: 1/2 NPT
• Electrical Output
  • Output Guarantee Voltage (P-P): 13.4 V
  • Output Polarity: white lead positive (typical AI-TEK coding)
• Cabling Details
  • Termination: Cable (integral)
  • Cable Length: 10 meters (32.8 ft)
• Environmental Limits
  • Temp Rating: -65°C to +95°C
  • Agency Approval: None (general industrial use)

📏 Additional Technical Data

• ▪ DC Resistance: 130 ohms max (typical for 70085 series)
• ▪ Typical Inductance: 33 mH reference
• ▪ Standard Output Voltage: 40 V (P-P) at higher speed
• ▪ Net Weight: approx 5 oz (due to longer cable and body)

⚡ Performance & Diagnostic Features

• Frequency range: 0 Hz to 20 kHz (depends on gear teeth).
• Sensitivity: 13.4 V guaranteed at low speed – ideal for zero-speed detection.
• Target material: Ferrous metals only (steel, iron).
• Diagnostic ability: Check output with oscilloscope. No signal? Verify air gap and target rotation.
• Built-in noise rejection: Passive design gives high immunity to electrical noise.

🛠️ Installation & Compatibility

• Mount using 3/4-20 UNEF-2A threaded hole. Use 1/2 NPT conduit for cable protection.
• Set air gap: 0.008 to 0.020 inch for best signal.
• Compatible with PLCs, tachometers, and AI-TEK signal conditioners.
• No external power needed. Works with most 5-24V DC inputs using a pull-up resistor.

📦 Warranty, Packaging & Delivery

• 12-month warranty covers manufacturing defects.
• Package: 1x sensor with 10m cable, no bracket included.
• Shipping: Fast delivery via FedEx, UPS, DHL worldwide.

🏭 Typical Applications

• Speed sensing on large motors, turbines, pumps, compressors.
• Zero-speed monitoring for conveyor systems.
• Overspeed protection in heavy industrial machinery.

❓ Frequently Asked Questions (Expert Answers)

• • Q1: What is the minimum speed this sensor can detect?
    A: It detects very low speeds. The 13.4V guaranteed output appears at approx 200 inches/sec surface speed. For zero speed, use a signal conditioner.
  • Q2: Can I extend the 10m cable?
    A: Yes. Use shielded twisted pair cable. Max total length 30m without signal loss. Keep away from power cables.
  • Q3: What happens if I install it backwards?
    A: Polarity won’t damage it, but output phase reverses. Check white lead positive for correct logic.
  • Q4: Buying guide – why choose this 70085-3030-222 model?
    A: Perfect for cold environments (-65°C). The 3/4-20 thread fits large machines. 10m cable saves extra connectors. 12-month warranty included.
  • Q5: How to test if my sensor is working?
    A: Connect oscilloscope across leads. Pass a steel gear tooth near tip. You must see AC voltage above 1V. No output? Check cable continuity.

• 🛒 Ordering tip – delivery & support
  A: We ship via FedEx, UPS, DHL. All orders include tracking. Contact WhatsApp for urgent help.

📞 Get Support & Place Order

• Technical questions or bulk orders: +86 158 8020 0923 (WhatsApp)
• Email response within 24 hours.