Description
Product Overview
The AI-TEK 70085-1010-037 is a compact speed sensor for industrial use. It measures rotational speed from gears or magnetic targets. This sensor suits harsh environments with a wide temperature range. Its simple design ensures reliable operation in demanding applications. The sensor uses two wires for power and signal output.
Key Features at a Glance
- Guaranteed low-speed output: 0.6 V (P-P) ensures detection at very low rpm
- Wide temperature range: -55°C to +107°C for extreme conditions
- Compact size: 0.5 inch thread length and 0.5 inch sensor length
- Standard 10-32 thread: easy installation in existing ports
- Lead wires included: 18-inch cable for flexible connection
Technical Specifications
- Brand: AI-TEK
- Model: 70085-1010-037
- Series: Passive Magnetic Speed Sensor
- Thread Size: 10-32 UNF
- Thread Length: 0.5 inch (12.7 mm)
- Total Sensor Length: 0.5 inch (12.7 mm)
- Output Type: Analog sine wave (passive)
- Standard Output Voltage: 13 V (P-P) at rated speed
- Guaranteed Output Voltage: 0.6 V (P-P) at lowest detectable speed
- DC Resistance: 190 ohms maximum
- Typical Inductance: 10 mH (reference value)
- Output Polarity: White lead positive
- Termination: Two insulated wires, 18 inches (45.7 cm) long
- Operating Temperature: -55°C to +107°C
- Agency Approval: None (general industrial use)
- Net Weight: 1 ounce (28 grams) maximum
Measurement & Performance Details
- Measurement Range: Detects zero speed to high rpm
- Frequency Response: Passive design from near 0 Hz to 15 kHz
- Sensitivity: 0.6 V (P-P) guaranteed at low speeds
- Linearity: Voltage output increases with target speed
- Resolution: Depends on gear tooth size and gap
- Temperature Stability: Full accuracy from -55°C to +107°C
- Environmental Tolerance: Resists dust, oil, and moisture
- Noise Immunity: Passive design needs no external power
Installation Guide
- Clean the mounting hole before installing the sensor.
- Apply anti-seize compound on 70085-1010-037 threads for stainless steel housings.
- Screw the sensor into the 10-32 port by hand until it touches the gear.
- Back the sensor out by 1/2 to 3/4 turn for proper air gap.
- Tighten the lock nut to secure the position without over-torquing.
- Route the lead wires away from high-voltage cables to reduce noise.
- Connect the white wire to positive signal input and shield to ground if used.
Diagnostic Capability
- Check output voltage with an oscilloscope while the target rotates.
- Low output (<0.6V) suggests a large air gap or damaged sensor.
- No output indicates a broken wire or wrong wiring polarity.
- You can measure DC resistance (190 ohms max) across the two wires.
- Open circuit means internal coil failure; replace the sensor.
Typical Applications
- Speed monitoring on conveyors and bucket elevators
- RPM measurement on pumps, fans, and blowers
- Over-speed protection for rotating machinery
- Under-speed detection on screw feeders and mixers
- Engine and turbine speed feedback in power generation
- Process control in steel mills, paper mills, and mines
Compatibility Information
- Works with any magnetic pickup converter or tachometer.
- Compatible with PLC high-speed counter inputs (24V DC).
- Matches with AI-TEK signal conditioners like 70085-1010-037 series.
- Suits gear modules from 0.5 to 2.0 with standard tooth profile.
- Use ferrous metal targets for best signal strength.
Package Contents
- One AI-TEK 70085-1010-037 speed sensor
- Two insulated lead wires (18 inches pre-attached)
- One hex lock nut for mounting
- Installation instruction sheet
- No calibration certificate or warranty card inside
Warranty & Shipping
- 12-month warranty covers manufacturing defects only.
- We ship via FedEx, UPS, or DHL with tracking number.
- Most orders leave our warehouse within 24 hours.
- International delivery typically takes 3-7 business days.
Frequently Asked Questions (FAQ)
Q1. What is the minimum speed this sensor can detect?
The 70085-1010-037 guarantees 0.6 V output at very low rpm. Exact speed depends on gear size, tooth count, and air gap.
Q2. Can I use this sensor in a high-vibration environment?
Yes. This sensor has no moving parts and withstands heavy vibration. Many users install it on engines and compressors.
Q3. How do I choose between AI-TEK models?
Select 70085-1010-037 for 10-32 thread and short 0.5-inch length. For longer reach or different threads, check other AI-TEK part numbers.
Q4. What happens if the air gap is too large?
Output voltage drops below 0.6 V, causing missed pulses. The speed reading becomes unstable or stops completely.
Q5. Does this sensor need external power?
No. The 70085-1010-037 is a passive magnetic sensor. It generates its own signal from passing gear teeth.
Q6. Can I extend the lead wires beyond 18 inches?
Yes, use shielded twisted-pair cable for extensions up to 300 feet. Keep the splice dry and mechanically secure.
Q7. Is this sensor suitable for hazardous areas?
No agency approval means no official rating. For Class I Div 2 areas, select an AI-TEK sensor with intrinsic safety certification.
Q8. How do I test if my sensor works without installation?
Move a steel object quickly across the sensor tip while measuring AC voltage. A healthy 70085-1010-037 will show a voltage spike.
Selection Guide
- Use 70085-1010-037 for 10-32 ports with short cavity depth.
- Pick a longer sensor if your mounting hole exceeds 0.5 inch depth.
- Choose a metric thread version for European standard ports.
- Select a high-output model for very low speed applications.
- For extreme temperatures above 107°C, ask about high-temp options.
- Need agency approval? Look for AI-TEK sensors with CSA or ATEX marks.
Contact Information
For inquiries, please call us: +86 158 8020 0923 (WhatsApp)
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