Series 600 High Accuracy Angular Displacement Transducers (ADTs)

The Series 600 ADTs are precision differential capacitive sensors designed for highly accurate angular displacement measurement. They feature integrated solid-state electronics (oscillator, demodulator, amplifier) to convert shaft angular position into a proportional DC voltage output. Key advantages include minimal non-linearity (<0.05%), absolute measurement capability, continuous rotation without reactive torque, and no mechanical wear due to absence of rubbing contacts.

• Measurement ranges: ±30º to ±60º
• Non-linearity: less than 0.05%
• Operating temperature: approximately -39°C to +64°C (-38°F to +150°F)
• Output impedance: typically below 2 ohms
• Zero adjustment: internal potentiometer plus remote zero control (requires internal zero fully clockwise)
• Shielding recommended for lead to pin C in noisy environments

Series 100 Linear Velocity Transducers

These transducers measure linear velocity by detecting movement of high coercive force permanent magnet cores within shielded coils. They generate a self-powered DC voltage output proportional to magnet velocity, eliminating the need for external excitation.

• Self-generating DC voltage output
• High sensitivity and magnetic shielding
• High frequency response suitable for dynamic velocity measurements

Operation and Installation

The output voltage is produced only during magnet movement, requiring precise mechanical alignment of the magnet at the electrical center of the coils for linear operation. The magnet should be positioned to allow movement over half the linear range in both directions. Mounting should use split blocks or clamps; set screws are discouraged to prevent internal damage.

Mechanical and Electrical Specifications

Detailed dimensions, weights, and thread sizes are provided for various models to aid fixture design. The transducers operate reliably from approximately -39°C to +100°C (-38°F to +212°F). Output polarity depends on the magnet’s north pole orientation and direction of travel. Electrical impedance is low, ensuring linear output voltage proportional to velocity.

Technical Specifications and Operating Parameters

• Operating temperature range: -39°F to +200°F (-39°C to +93°C)
• Maximum non-linearity: ±2.5% for readings
• Mechanical parameters: maximum starting and running torque, weight, bearing life (rated for 10 million revolutions at 5 lbs radial load)
• Mounting: any position using three tapped holes and stainless steel pilot for precise shaft positioning

Installation and Calibration

Installation requires aligning the shaft slot with a drill spot on the transducer face to identify the calibrated linear range within one shaft revolution. Only one linear range is calibrated per unit. Specific models have defined zero positions corresponding to this alignment.

Core Extension Rods

Nonmagnetic stainless steel core extension rods are available separately to maintain full operational range. Using shorter rods than recommended reduces usable measurement range. Recommended rod lengths are specified per model in inches and millimeters.

Custom Application Forms

Two application assistance forms are provided for Angular Displacement Transducers (ADT) and Linear Variable Transducers (LVT). These forms collect detailed application parameters including maximum angular stroke or velocity, dimensional constraints, output voltage/current, temperature and vibration conditions, frequency response, torque/acceleration limits, non-linearity requirements, environmental factors, MIL specifications, termination types, and scheduling needs. Contact information fields enable follow-up by Trans-Tek’s Application Engineers.

Contact and Support Information

Trans-Tek provides phone, fax, and web contact details for technical support and application engineering. Users are encouraged to submit the custom requirement forms to receive tailored solutions.