AI-TEK 70085-1010-415 Definitive Guide to High-Sensitivity Speed Sensors

The AI-TEK 70085-1010-415 is a high-sensitivity magnetic speed sensor designed for demanding industrial applications, particularly within the railway and traction control sectors. Manufactured by AI-TEK Instruments (formerly known as Airpax), this sensor is part of the renowned 70085 series, which is widely recognized for its rugged construction and reliable performance in harsh environments .

This passive magnetic pickup sensor operates without the need for external power, generating an AC voltage signal as ferrous metal targets (such as gear teeth or keyways) pass its pole piece. The 70085-3030-415 is specifically engineered to provide accurate speed measurement and control in applications where durability and precision are non-negotiable, including traction control systems, speed monitoring, and data logging applications .

The 70085 series has earned its reputation through decades of service in critical infrastructure projects worldwide, from the London Underground to Taipei's light rail commuter trains, demonstrating its capability to withstand the extreme demands of the transportation industry .

Key Technical Specifications

Understanding the technical parameters of the AI-TEK 70085-1010-415 is essential for proper application and integration. Below are the detailed specifications based on the 70085 series characteristics:

Parameter Specification

Output Voltage (Standard) 150 V (P-P) typical 

Output Voltage (Guaranteed Point) 12.9 V (P-P) minimum 

DC Resistance 1500 Ohms maximum 

Typical Inductance 360 mH reference 

Output Polarity Pin 'B' positive 

Operating Temperature -55°C to +107°C (-67°F to +225°F) 

Net Weight 5 ounces maximum 

Housing Material Stainless steel (industry standard for 70085 series)

Protection Class Hermetically sealed for harsh environments

The 70085-3030-415 features a specific mechanical configuration (denoted by the "-415" suffix) that determines its mounting thread, body length, and terminal configuration. This model is designed for direct replacement in existing installations or for new systems requiring its particular form factor.