AI-TEK 70085-1010-004 Series Sensor | 5/8-18 Thread Speed Probe

Description Product Overview AI-TEK 70085-1010-004 is a robust speed sensor for industrial use. It delivers reliable non-contact speed sensing in harsh environments. The sensor works with gears or ferrous targets to generate speed signals. Users trust it for accurate and durable performance over time. This model replaces older units with the same mounting style. Technical Specifications Brand: AI-TEK Model: 70085-1010-004 Output Voltage (Standard): 43 V peak-to-peak Guaranteed Output Voltage: 4.3 V peak-to-peak DC Resistance: 130 ohms maximum Typical Inductance: 32 to 46 mH (reference) Output Polarity: Red lead is positive Operating Temperature: -73°C to 107°C Lead Length: 10 feet (3.05 meters) Net Weight: 16 oz maximum Thread Size: 5/8-18 UNF Thread Length: 1.125 inches Total Sensor Length: 2.125 inches Termination: 2-wire leads (no connector) Key Performance Metrics Measurement Range: 0 to 20,000 Hz (typical gear tooth) Frequency Response: passive design, no lower limit Sensitivity: 43 V P-P at high speed, 4.3 V P-P guaranteed Linearity: excellent for variable speed monitoring Resolution: depends on gear tooth size and gap Temperature Range: -73°C to 107°C Environmental Resistance: sealed against oil, dust, moisture Noise Immunity: passive magnetic pickup, no external power needed Installation Guide Clean the mounting hole before installation. Screw the sensor into a 5/8-18 UNF threaded port. Leave 1.125 inches of thread exposed as shown. Set the air gap to 0.005 to 0.015 inches from the gear tooth. Tighten the locknut gently to avoid damage. Connect the red lead to the positive signal input. Connect the black or shield lead to ground. Calibration & Maintenance No external calibration is required for normal use. Check the air gap during routine machine checks. Clean the sensor tip with a soft cloth if needed. Do not disassemble the sealed sensor body. Test with an oscilloscope to see the output waveform. Replace the sensor if output drops below 4.3 V P-P. Compatibility Notes Works with most PLCs, counters, and tachometers. Compatible with 5/8-18 UNF threaded housings. Matches original AI-TEK 70085 series mounting. Use with ferrous gears of any module size. Not suitable for non-ferrous or plastic targets. Output is AC voltage; use a signal conditioner if needed. Certifications & Approvals Agency Approval: None (general industrial use). Complies with RoHS standards. Manufactured under ISO 9001 quality system. No hazardous materials inside the sensor. Package Contents 1 x AI-TEK 70085-1010-004 speed sensor 10-foot attached cable (red and black leads) Installation note (basic air gap guide) No mounting bracket or gear included Warranty & Shipping Warranty: 12 months from delivery date. Covers manufacturing defects only. Does not cover wear, misuse, or wrong installation. Shipping Methods: FedEx, UPS, DHL worldwide. Express delivery in 3 to 7 business days. Typical Applications Speed feedback for motors and generators. Overspeed detection on turbines and fans. Conveyor belt speed monitoring. Pump and compressor speed sensing. Industrial engine RPM measurement. Backup for electronic encoders in harsh areas. Diagnostic Capability Use an oscilloscope to check peak-to-peak voltage. Low output ( No output means open circuit or missing target. DC resistance test: should be under 130 ohms. High resistance indicates broken wire inside. Inductance test: between 32 and 46 mH is normal. Frequently Asked Questions (FAQ) What is the minimum speed this sensor can detect?It has no fixed minimum. At very low speed, voltage drops. Use a conditioner for speeds below 10 Hz. Can I cut and extend the cable?Yes, but keep total length under 50 feet. Shorter wire gives better noise immunity. Why is my output voltage only 2 V?Air gap is too large. Reduce it to 0.010 inches. Also check gear material and speed. Does this work with stainless steel gears?Only if stainless is ferritic (magnetic). Austenitic stainless will not work. What happens if I reverse the wires?The signal polarity flips. Most PLCs can handle it, but phase may reverse. Can this sensor replace a 70085-1010-003?Yes, the electrical and mechanical specs are identical. Only batch codes differ. Selection Guide (How to Choose) Match thread size to your mounting port (5/8-18 UNF). Check your expected max speed. This sensor works up to 20 kHz. For very long cables, choose a model with a built-in amplifier. If your environment exceeds 107°C, pick a high-temp version. For dirty or wet areas, this sealed sensor is a good choice. Need a connector? See AI-TEK 70085-1010-005 (different termination). For questions, contact an engineer before ordering. Contact & Support For inquiries, reach us via WhatsApp: 86 158 8020 0923 We reply within 24 hours on business days. Technical support includes wiring and troubleshooting help. Copyright © 2026 PLCDCS HUB Limited. All rights reserved. Original Source: https://plcdcshub.com/ Partner: Powergear X Automation Limited Partner: Oiltech Controls Limited