AI-Tek 70085-1010-425 | Lightweight Passive Sensor

AI-Tek Instruments 70085-1010-425 Passive Speed Sensor

The 70085-1010-425 provides compact speed monitoring solutions for space-constrained industrial applications. This lightweight AI-Tek passive sensor features a short 40-inch cable and minimal weight while maintaining reliable performance across standard industrial temperature ranges.

Product Overview

This compact passive speed sensor is designed for applications where space and weight are critical factors. It delivers consistent performance with a short integrated cable, making it ideal for OEM equipment and compact machinery installations.

Core Specifications

• Manufacturer: AI-Tek Instruments (Airpax)
• Part Number: 70085-1010-425
• Sensor Type: Passive Speed Sensor
• Technology: Passive (Self-generating)
• Condition: New Original Factory Packing
• Cable Option: -355 (40 inch/101.6 cm)

Electrical Performance

• Standard Output Voltage: 55 volts peak to peak
• Guaranteed Output Voltage: 4.2 volts peak to peak minimum
• DC Resistance: 960 ohms maximum
• Typical Inductance: 125 millihenries
• Output Polarity: White lead positive
• Frequency Response: 25 Hz to 2,000 Hz
• Measurement Range: 0 to 4,500 RPM
• Response Time: 8 milliseconds maximum
• Output Linearity: ±2.5% of full scale
• Minimum Load Impedance: 15k ohms

Physical Specifications

• Cable Length: 40 inches (101.6 cm)
• Net Weight: 2 ounces maximum
• Thread Size: 1/2-20 UNF
• Thread Length: 0.75 inches (19.05 mm)
• Sensor Length: 2.25 inches (57.15 mm)
• Housing Diameter: 0.625 inches (15.88 mm)
• Shipping Weight: 0.5 kilograms

Environmental Specifications

• Operating Temperature: -55°C to +107°C
• Storage Temperature: -65°C to +125°C
• Ingress Protection: IP54 rated
• Housing Material: Anodized aluminum
• Cable Type: PVC insulated 20 AWG
• Mounting Torque: 12 ft-lbs maximum
• Vibration Resistance: 8g from 10-1000 Hz
• Shock Resistance: 25g for 11 milliseconds
• Humidity Range: 10% to 90% non-condensing

Target Specifications

• Target Material: Ferromagnetic materials
• Optimal Gap Range: 0.2 to 0.8 millimeters
• Gear Tooth Count: 12-60 teeth recommended
• Target Speed: 150 to 4,500 RPM
• Minimum Tooth Width: 1.5 millimeters
• Target Thickness: 3.0 millimeters minimum

Key Features

• Ultra-lightweight at only 2 ounces maximum
• Short 40-inch cable for compact installations
• High inductance design for stable signal output
• White lead positive polarity for easy identification
• Anodized aluminum housing for corrosion resistance
• Compact 2.25-inch sensor length
• IP54 protection against dust and water splashes
• Low power consumption passive design

Industrial Applications

• Small motor speed monitoring
• Laboratory test equipment
• Robotics and automation systems
• Medical equipment manufacturing
• Precision instrument monitoring
• Office equipment manufacturing
• Small pump and fan systems
• Electronic enclosure cooling fans

Installation Requirements

• Mount using 1/2-20 UNF threaded connection
• Apply maximum 12 ft-lbs mounting torque
• Maintain 0.2-0.8mm gap from target surface
• Connect white lead as positive terminal
• Ensure proper IP54 seal engagement
• Route 40-inch cable with minimal bending radius
• Verify target alignment and gap setting
• Test output signal with appropriate equipment

Compatibility Information

• Works with standard speed monitoring systems
• Compatible with PLC frequency input modules
• Connects to digital tachometer displays
• Interfaces with data acquisition systems
• Works with overspeed protection circuits
• Compatible with vibration analysis equipment

Shipping & Packaging

• Anti-static protective packaging
• Includes sensor with 40-inch integrated cable
• Installation manual and specifications
• Certificate of calibration
• Worldwide shipping via FedEx, UPS, DHL
• Standard lead time: 2-4 working days
• Bulk packaging options available

Frequently Asked Questions

• How long is the cable? 40 inches (101.6 cm) integrated cable.
• What is the maximum weight? 2 ounces (56.7 grams) net weight.
• What is the operating temperature range? -55°C to +107°C.
• What thread size is used? 1/2-20 UNF standard thread.
• What is the guaranteed output voltage? 4.2 volts peak to peak minimum.