AI-TEK 70085-1010-355 70085 Series Passive Speed Sensors

The AI-TEK 70085-1010-355 is a high-performance passive magnetic speed sensor from the renowned AI-TEK (formerly AIRPAX) brand, designed for precise rotational speed measurement in demanding industrial environments. AI-TEK has established itself as a global leader in speed sensing technology, with decades of expertise serving critical applications across power generation, petrochemical, marine, and heavy industrial sectors .

This particular model belongs to the 70085 series, which represents AI-TEK's family of passive magnetic pickups (variable reluctance sensors) known for their exceptional reliability, durability, and accuracy. These sensors operate without the need for external power, generating their own signal through magnetic induction—a fundamental advantage for applications requiring intrinsic safety and long-term stability .

The 70085-1010-355 is engineered to monitor rotational speed by detecting ferrous gear teeth, keyways, or other discontinuities on rotating shafts, converting mechanical motion into precise electrical signals for control systems, tachometers, and protective monitoring equipment.

Key Technical Specifications

General Specifications

Parameter Specification

Part Number 70085-1010-355

Sensor Type Passive Magnetic Pickup (Variable Reluctance)

Output Type AC Voltage (Sine Wave)

Operating Principle Magnetic Induction

Housing Material Stainless Steel

Mounting Thread Standard industrial thread configuration

Connector Type Integrated cable with specific termination

Electrical Characteristics

Parameter Specification

Output Voltage (Typical) 54V P-P (at optimal conditions) 

Output Voltage (Minimum) 13.4V P-P 

DC Resistance 240 Ohms 

Typical Inductance 30 mH 

Output Polarity White lead positive 

Frequency Response Optimized for industrial speed ranges

Environmental Specifications

Parameter Specification

Operating Temperature -65°F to +212°F (-54°C to +100°C) 

Storage Temperature Extended range for harsh environments

Vibration Resistance High immunity to industrial vibration 

Shock Resistance Robust construction for impact-prone applications 

Environmental Protection Sealed against moisture and contaminants

Cable Length 10 feet (3.05 meters) standard 

Mechanical Specifications

Parameter Specification

Probe Length Customized for specific 70085-1010-355 configuration

Thread Size Industry-standard dimensions

Gap Setting Typically 0.020" to 0.030" from gear tooth

Weight Lightweight, minimal impact on installation

Termination Pre-wired with color-coded leads