AI-TEK 70085-1010-412 Ultimate High-Sensitivity Speed Sensor

The AI-TEK 70085-1010-412 is a high-performance, passive magnetic speed sensor designed by AI-TEK (also known as A-Tech Instruments), a trusted American manufacturer of rugged sensing solutions for demanding industrial environments . This sensor is part of the renowned 70085 series, which has established itself as the industry standard for variable reluctance speed sensing across rail, aerospace, and general industrial applications .

Unlike active sensors requiring external power, the 70085-3030-412 operates on a self-powered variable reluctance principle, generating a robust AC voltage signal purely from the motion of ferrous targets passing its magnetic face. This "passive magic" design ensures exceptional reliability in environments where power availability is uncertain or where intrinsic safety is paramount .

Built to thrive where ordinary sensors fail, the 70085-3030-412 withstands extreme vibration, shocking thermal extremes, and contamination from dust, oil, and moisture—making it the preferred choice for engineers who demand uncompromising performance in critical speed monitoring, traction control, and data logging systems .

Key Technical Specifications

Understanding the precise specifications of the AI-TEK 70085-3030-412 is essential for proper application engineering. Based on the 70085 series characteristics and comparable model specifications, here are the detailed parameters :

Parameter Specification Notes

Part Number 70085-1010-412 Full AI-TEK model designation

Operating Principle Variable Reluctance (Passive Magnetic) Self-generating, no external power required 

Output Voltage (Typical) 150 V (P-P) Peak-to-peak at rated conditions 

Output Voltage (Guaranteed Minimum) 12.9 V (P-P) Ensured performance at specified air gap and target speed 

DC Resistance 1500 Ohms maximum Critical for interface with monitoring equipment 

Typical Inductance 360 mH reference Affects low-speed performance characteristics 

Output Polarity Pin 'B' positive Standardized wiring configuration 

Operating Temperature -55°C to +107°C Wide industrial temperature range 

Net Weight 5 ounces maximum Lightweight, rugged construction 

Housing Material Stainless steel Corrosion-resistant for harsh environments

Connection Type Integral cable or connector Configuration-dependent

Mounting Thread Standard 70085 series interface Compatible with industry-standard mounting arrangements

Superior Advantages of AI-TEK 70085-1010-412

1. True Self-Powered Operation

The 70085-1010-412 requires no external excitation voltage or signal conditioning electronics at the sensing point. This passive operation eliminates power supply concerns, reduces wiring complexity, and enhances system reliability—particularly valuable in remote installations or hazardous areas where running power cabling is problematic .