OVERVIEW
• Free Core design
• AC LVDT
• 0.812" (20mm) O.D. size body
• Stroke lengths from ± 0.05 to ± 10 inches (± 1.3mm to ± 254mm)
• Non-Linearity better than ± 0.25% of FS
• Stainless steel housing rated to IP61
• Applications: Laboratory R&D Materials Testing, Valve Position Sensing, Factory Automation
MADE IN THE USA
The HGSI T-812-A series AC Linear Variable Differential Transformer (LVDT) Position Sensors are used to monitor and track the linear motion or position of a target. These ruggedized sensors are ideal for use in industrial and laboratory applications including automotive R&D, motorsports, industrial, motion control, medical, military and aerospace.
These swaged-end sensors are constructed entirely of stainless steel and are resistant to dust and temperature. The coil windings are sealed using an epoxy potting compound providing excellent protection against shock and vibration.
The T-812-A series will operate with most any conventional differential input AC LVDT signal conditioner, but operation with ratiometric signal conditioning is not recommended. HGSI offers a full line of compatible AC LVDT signal conditioners. Please contact us for a recommendation.
Options:
TECHNICAL SPECIFICATIONS
Input Voltage: | 3 Vrms (nominal) |
Input Frequency: | 400 Hz to 10 kHz |
Linearity Error: | ≤ ± 0.15% of FSO typical, ± 0.25% maximum |
Null Voltage: | 0.5% of FS |
Repeatability: | 0.01% of FS |
Hysteresis: | 0.01% of FS |
Operating Temperature: | Standard Version: -54 to +135°C (-65 to +275°F) |
Thermal Coefficient: | < -0.02%/°C of FS (< -0.01%/°F of FS) |
Humidity: | 90% RH |
Housing: | Stainless steel |
Lead Wires: | 32 AWG Teflon™ insulated, 12” length (305 mm) |
Life Expectancy: | > 100 million cycles |
Shock Rating: | 1000g, 11 mS |
Vibration Rating:: | 20 g to 2 kHz |
IP Rating: | IEC IP61 |
Country of Manufacture: | Made in USA |
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Product Overview
The T-812-A Series AC Linear Variable Differential Transformer (LVDT) from Harold G. Schaevitz Industries delivers rugged and reliable linear position sensing in a 0.812" (20 mm) body. Designed with a free core, this AC LVDT offers a wide selection of stroke lengths—from ±0.05 inch to ±10 inches (±1.3 mm to ±254 mm)—for precision measurement in industrial and research applications.
Built to withstand the demands of automotive, aerospace, and factory automation applications, the T-812-A is a highly durable and accurate sensor solution for engineers requiring long service life and high repeatability and reliability in motion control and measurement systems.
Key Features
Free Core design for simple mechanical integration
AC LVDT technology for contactless position sensing
Stroke lengths from ±0.05 to ±10 inches (±1.3 mm to ±254 mm)
0.812" (20 mm) outer diameter body
Non-linearity ±0.25% of full scale
Stainless steel housing rated to IP61
Epoxy-potted windings for enhanced vibration and shock protection
Made in the USA
Built for Precision and Durability
The T-812-A series is built for applications where precise displacement measurement and long-term performance are critical. The free core design allows for easy coupling to external moving parts using a core extension rod or mechanical linkage, making it highly adaptable to a wide variety of systems.
The sensor's stainless steel construction offers strength and corrosion resistance, while the epoxy-sealed internal coil assembly protects against environmental stress, vibration, and mechanical shock—ideal for both lab and field conditions.
Applications
Laboratory & R&D
The T-812-A is an excellent choice for test labs and research facilities requiring repeatable, accurate displacement data for:
Material testing systems
Prototyping and performance validation
Linear actuator verification
Valve Position Sensing
Engineers can rely on the T-812-A for feedback on valve position and stroke in:
Hydraulic and pneumatic control systems
Flow regulation and energy management setups
Harsh industrial environments
Factory Automation
With its robust body and extended stroke range, the T-812-A is suitable for:
Robotics and motion control
Production line monitoring
Packaging and assembly equipment
Aerospace & Automotive
Used in aerospace and automotive R&D and control systems, the T-812-A offers:
Compact form factor for tight integration
High resistance to environmental factors
Stable readings under vibration and temperature variation
Electrical Compatibility
The T-812-A is compatible with most standard differential input AC LVDT signal conditioners. HGSI offers signal conditioners and can assist with selecting the right unit for your application needs.
Why Choose the T-812-A?
Contactless AC LVDT technology with high reliability
Rugged, stainless steel body for harsh environments
Wide range of stroke lengths for flexibility
Precise, repeatable output with low non-linearity
Proudly made in the USA with expert technical support
Need help selecting or integrating a T-812-A sensor?
Contact HGSI today for expert assistance and application-specific recommendations.