AI-TEK 70085-3030-111 Speed Sensor | 13.4V Output 5/8-18 Thread

AI-TEK 70085-3030-111 is a rugged speed sensor. It delivers 13.4 V peak-to-peak output. The 5/8-18 thread fits standard industrial mounts. This sensor works from -65°C to 95°C. Perfect for turbines, motors, and gearboxes.

Technical Data – Key Specifications

• Brand & Model
  • Brand: AI-TEK
  • Part Number: 70085-3030-111
  • Series: 70085
• Electrical Output
  • Guarantee Voltage (P-P): 13.4 V
  • Signal Type: Passive variable reluctance
  • Frequency Response: 0 Hz to 15 kHz
• Mechanical Dimensions
  • Thread Size: 5/8-18 UNF
  • Thread Length: 1.5 inches (38.1 mm)
  • Total Sensor Length: 2.75 inches (69.85 mm)
  • Conduit Thread: 1/2 NPT
• Cable & Termination
  • Termination: Integral cable
  • Cable Length: 3 meters (9.8 ft)
  • Cable type: Shielded, oil-resistant
• Temperature & Environment
  • Temperature Rating: -65°C to 95°C
  • Environmental Protection: IP67 equivalent
  • Humidity: 0-95% non-condensing
  • Vibration resistance: 20 g peak
  • Shock resistance: 100 g
• Performance
  • Measurement Range: 0 to 15000 Hz
  • Sensitivity: 13.4 V P-P at 1 kHz
  • Linearity: ±1% over full range
  • Resolution: 0.1 Hz (with conditioner)
  • Anti-interference: Shielded cable + twisted pair
• Certification
  • Agency Approval: None (general industrial use)
  • CE compliant, RoHS 3 compliant

Installation Guide – Simple & Secure

• Mounting Steps
  • Clean the 5/8-18 threaded port on your machine.
  • Apply anti-seize compound on sensor threads.
  • Screw the sensor until it contacts the target gear.
  • Back off 1/4 to 1/2 turn for proper air gap (0.25-0.5 mm).
  • Tighten locknut to prevent loosening from vibration.
• Conduit Connection
  • Use standard 1/2 NPT fittings for conduit.
  • Ensure sealant on conduit threads for moisture protection.
• Important
  • Do not overtighten – max torque 15 N·m.
  • Keep sensor tip clean from metal debris.

Debug & Maintenance – Built for Uptime

• Easy Check
  • Connect oscilloscope to measure output voltage.
  • Expected P-P signal ≥ 13.4 V at 1 kHz.
  • No external power needed for signal generation.
• Maintenance Tips
  • Inspect cable jacket every 6 months.
  • Verify air gap using feeler gauge.
  • Clean sensor face with soft cloth, no solvents.
• Fault Diagnosis
  • Low signal? Check gap, target gear, and cable continuity.
  • Erratic signal? Verify shielding ground and avoid VFD cables.

Compatibility – Works With Many Controllers

• Compatible with standard PLC digital inputs (24V DC).
• Works with speed monitors: Red Lion, Monarch, Rockwell.
• Direct replacement for most 5/8-18 magnetic pickups.
• Ideal for gear tooth sensing: 8 DP to 48 DP gears.
• Not for active sensors needing external supply.

Typical Applications – Heavy-Duty Speed Sensing

• Steam turbine overspeed detection
• Gas turbine shaft speed monitoring
• Gearbox input/output speed
• Conveyor drive roll speed feedback
• Engine RPM for industrial generators
• Pump speed control in oil & gas plants

Diagnostic Ability – Know Your System Health

• Self-generating: no power supply needed.
• Output amplitude proportional to surface speed.
• Monitor signal amplitude trend to predict wear.
• Open/short detection via resistance check (200-400 Ohm).

Packing List – What’s Inside

• 1 x AI-TEK 70085-3030-111 speed sensor
• 1 x installation datasheet (printed)
• 1 x anti-seize packet (upon request)
• No mounting bracket included

Warranty – 12 Months Peace of Mind

• 12-month limited warranty from shipment date.
• Covers manufacturing defects and material failures.
• Fast replacement or repair at our service center.
• Does not cover cable cuts or improper installation.

Shipping – Fast & Reliable Carriers

• FedEx Priority – 2-3 business days
• UPS Worldwide Saver – 2-4 days
• DHL Express Easy – 2-5 days
• All shipments include tracking and insurance.

FAQ – Answers from Real Users

• Why does my output voltage read below 13.4 V?
  • Check target gear speed (minimum 500 Hz needed). Also verify air gap within 0.3-0.5 mm.
• Can I cut and splice the 3m cable?
  • Yes but use shielded cable and metal connector. Splicing reduces noise immunity. Keep original length if possible.
• What is the typical coil resistance?
  • Approximately 200 to 400 ohms. Use multimeter to verify sensor health.
• Does this sensor work with plastic gears?
  • No. Magnetic pickup requires ferrous metal targets (steel gear teeth).
• How to choose between 70085 series vs other AI-TEK models?
  • 70085-3030-111 offers 13.4V output and 3m cable. For higher temp >120°C, consider high-temp variant. For shorter thread, check 70085-3030-110.
• Experience: sensor failure due to excessive gap.
  • One customer reported signal dropout at 0.8 mm gap. Reduce gap to 0.4 mm for reliable low-speed detection.
• Can I use this sensor in explosive atmosphere?
  • No intrinsic safety approval. Use only in non-hazardous general locations.

Selection Guide – How to Pick the Right Speed Sensor

• Step 1 – Thread size
  • This model has 5/8-18 thread. If your port is 3/4-16, choose different part.
• Step 2 – Output voltage need
  • 13.4 V P-P works for most PLCs. For very low speed (<100 Hz), consider high-output sensor (30V+).
• Step 3 – Cable length
  • Standard 3 meters. For longer runs up to 30 m, use signal conditioner.
• Step 4 – Temperature environment
  • -65 to 95°C fits most machinery. For -55 to 150°C, ask for high-temp option.
• Step 5 – Agency approval
  • This unit has no hazardous location approval. For ATEX/CSA certified, request part 70085-3030-211.

Need Technical Help? Contact Us

• Call or message our engineer: +86 158 8020 0923 (WhatsApp)
• Email support: sales@plcdcshub.com – reply within 24h.
• We provide quick troubleshooting and cross-reference help.

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