AI-TEK 70085-1010-118 70085 Series Passive Speed Sensors

 The AI-TEK 70085-1010-118, part of the renowned 70085 Series, stands out as a premier solution for engineers and maintenance professionals seeking reliable variable reluctance speed sensors. Also known as passive magnetic pickups, these sensors are engineered to deliver accurate performance in the most demanding environments, from heavy machinery to aerospace applications .

What is the AI-TEK 70085 Series?

The 70085 Series by AI-TEK (also known as AI-Tek Instruments or 阿泰克) represents a line of high-quality passive speed sensors that operate without the need for an external power supply. They utilize variable reluctance technology to generate an AC voltage signal purely from the motion of a ferromagnetic object, such as a gear tooth or shaft keyway . This "self-powering" capability makes them incredibly versatile and simple to integrate into existing control and protection circuits .

Key Technical Specifications

The specific model 70085-3030-118 is designed to meet rigorous operational standards. While the 70085 series offers various configurations, this model shares the core characteristics of its family, which include robust construction and high output .

Sensor Type: Inductive Passive Speed Sensor (Variable Reluctance) .

Output Signal: Digital (AC Voltage Pulse) .

Operating Principle: Generates a voltage pulse without external excitation when a ferrous target passes the pole piece.

Typical Inductance: Approximately 32-46 mH (reference for the series) .

DC Resistance: Typically 130 ohms max .

Output Voltage: Standard units can produce up to 43 V (P-P) or higher depending on gear size and speed, with guaranteed minimum outputs at specific test points .

Temperature Range: Designed for extreme environments, these sensors typically operate from -73°C to +107°C (-100°F to +225°F) .

Construction: Features a threaded body for easy installation and is sealed against environmental contaminants like oil, dust, and moisture .