LVDT Manufacturer 

Motion Sensors is a brand of Sentech Inc, a global leader in precision position sensing technology since 1988. Sentech’s brand of LVDT and RVDT product line of engineered sensors is trusted by aerospace, defense, space, and power generation / energy industries worldwide.

LVDT Product Line

Linear Variable Differential Transformers deliver accurate, repeatable position measurement without mechanical contact between components. This frictionless operation eliminates wear and ensures stable output throughout the sensor’s lifetime.

Sentech manufactures LVDTs and RVDTs for environments where failure isn’t an option, from critical aircraft flight controls to nuclear turbine systems. Every unit is built under our ISO 9001:2015 and AS9100 Rev D certified quality system.

Custom LVDTs & RVDTs Available

Most orders involve some level of customization. We routinely modify mounting styles, electrical terminations, stroke lengths, diameters, and materials to match your exact requirements. Miniaturized designs, extended temperature ranges, RTCA DO-160 and MIL-SPEC electronics packages are available.

Product Overview

Standard AC Models

• 75 Series — 0.750″ diameter, versatile AC-in/AC-out configuration
• 813 Series — 0.813″ diameter AC unit for applications requiring slightly larger form factor

DC Models with Built-In Signal Conditioning

• 75DC Series — 15V input, ±10V output
• 75S1DC Series — 15V input, 0-10V unipolar output
• 75S2DC Series — 24V input, 1-10V output
• 81STDC Series — 24V input, bipolar voltage output
• 42DC Series — 24V input, 4-20mA current loop output

Harsh Environment & High-Pressure Units

• 75PCAC / 75PCDC Series — Stainless steel pressure-sealed housings rated to 5,000 PSI, with configurations available for full submersion at pressures up to 30,000 PSI

Performance Capabilities

Sentech LVDTs accommodate strokes as short as 0.005″ for precision gauging or as long as 70″ for large-scale positioning. Standard linearity is ±0.25% of full scale, with temperature ratings spanning -65°F to +400°F.

For safety-critical systems, we offer multi-channel configurations with 2, 3, or 4 channels in a single housing, providing redundancy in critical applications.

Where They’re Used

Our LVDTs and RVDTs operate in commercial aircraft actuators, defense systems, gas, nuclear, and steam turbine controls, hydraulic cylinders, subsea equipment, automated manufacturing lines, and test & measurement setups across dozens of industries.

Get Started

Ready to discuss your application? Request a quote directly from Sentech’s engineering team.