The Messotron DPA-H Series High-Pressure Linear Inductive Displacement Transducers (LVDT) represent a top-tier, high-end industrial solution for specialized position tracking and mechanical stroke validation inside heavy-duty proportional hydraulic systems, thoroughly designed, tested, and engineered at Messotron's state-of-the-art precision mechanical manufacturing hubs in Germany. This comprehensive sensor line consolidates all variable range models including the DPA-H-25, DPA-H-50, DPA-H-75, DPA-H-100, DPA-H-150, DPA-H-200, DPA-H-250, and DPA-H-300. Operating on the trusted Linear Variable Differential Transformer (LVDT) principle paired with a super-reinforced structural composition, these devices allow for direct, deep submerged integration inside the high-pressure oil cavities of heavy-duty hydraulic cylinders or valve control matrices without requiring any auxiliary isolation pressure membranes. The "H" (High-Pressure / Hydraulic) suffix notation formally validates that the components are engineered to endure continuous static working pressures up to 350 bar (with transient pressure spikes up to 450 bar), establishing this sensor family as an irreplaceable technical component for heavy industrial positioning loops.

The core engineering advantage characterizing the Messotron DPA-H Series centers on its completely frictionless, non-contact inductive tracking principle. The moving magnetic core armature travels freely within the internal high-pressure pressure tube sleeve of the stator assembly without generating any physical contact, dragging friction, or surface sliding against the interior walls. By completely eliminating internal mechanical rubbing, physical component wear, sliding degradation, and measurement hysteresis loops are entirely avoided, maintaining absolute data repeatability over extensive continuous operating schedules and yielding a near-infinite runtime lifespan submerged in industrial fluids. The nominal measurement spectrum of this series is exceptionally flexible, providing a rich choice from micro-differential travel models like the DPA-H-25 (featuring a 25mm total travel capacity) ideal for high-precision servo valves and proportional flow manifolds, up to extended travel metrics including the DPA-H-100, DPA-H-200, and the heavy-duty DPA-H-300 model with a 300mm linear travel capacity, flawlessly accommodating industrial-grade cylinder piston displacements.

The pressure-housing sleeve of the Messotron DPA-H Series is precision-machined from high-strength specialized alloy steel displaying exceptional mechanical tensile properties and superior resistance to chemical corrosion from industrial hydraulic fluids. The internal transformer stator windings are hermetically enclosed and isolated from the high-pressure oil block using Germany's advanced pressure-tight laser-welding technologies, fully achieving strict environmental protection ratings of IP67 or IP68. Furthermore, Germany's strict symmetrical multi-coil winding methodology provides the DPA-H series with native immunity against extensive electromagnetic interference (EMI) fields, ensuring clean, sharp data transmission paths even when mounted adjacent to high-power solenoid valve coils. The raw electrical output signal is an unconditioned alternating current (AC) carrier frequency output, yielding supreme measurement reliability and excellent thermal stability. When paired with Messotron's external carrier frequency signal conditioners and amplifier units positioned remotely inside electrical enclosures, it smoothly transitions into industry-standard analog configurations (4-20mA, 0-10V) for hassle-free interface routing into central PLC nodes. This sensor acts as a technical backbone for mechanical inspection systems in heavy construction machinery bucket positioning, steel mill hot-rolling roller actuators, marine steering gear loops, hydroelectric dam gate controls, and high-speed automated injection molding equipment. Specifying the Messotron DPA-H Series is the premier choice for facilities seeking uncompromised operational continuity and maximal machinery runtime safety parameters.

• Manufacturer: Messotron
• Country of Origin: Germany
• Product Category: High-Pressure In-Cylinder Inductive Linear Displacement Transducers (Hydraulic LVDT)
• Consolidated Consolidated Model Registries: Messotron DPA-H-25, DPA-H-50, DPA-H-75, DPA-H-100, DPA-H-150, DPA-H-200, DPA-H-250, DPA-H-300.
• Core Technology: Linear Variable Differential Transformer - High-reliability mechanical frictionless non-contact inductive tracking
• Operating Pressure Rating: Sustains continuous static working pressure up to 350 bar (35 MPa), with transient peak surge tolerance up to 450 bar
• Nominal Linear Measuring Strokes per Model Designation:
  - Model DPA-H-25: Linear stroke range ± 12.5 mm (Total travel capacity 25 mm)
  - Model DPA-H-50: Linear stroke range ± 25.0 mm (Total travel capacity 50 mm)
  - Model DPA-H-75: Linear stroke range ± 37.5 mm (Total travel capacity 75 mm)
  - Model DPA-H-100: Linear stroke range ± 50.0 mm (Total travel capacity 100 mm)
  - Model DPA-H-150: Linear stroke range ± 75.0 mm (Total travel capacity 150 mm)
  - Model DPA-H-200: Linear stroke range ± 100.0 mm (Total travel capacity 200 mm)
  - Model DPA-H-250: Linear stroke range ± 125.0 mm (Total travel capacity 250 mm)
  - Model DPA-H-300: Linear stroke range ± 150.0 mm (Total travel capacity 300 mm)
• Full-Scale Linearity Deviation Tolerance: Extremely tight specification standard of ≤ ±0.25% to ±0.5% across total stroke limits
• Measurement Repeatability Performance: Exceptional precision repeatability yielded down to micro-scale due to total absence of slide friction
• Electrical Signaling Protocol: Raw unconditioned alternating current AC output (Requires external carrier frequency amplifier module for 4-20mA / 0-10V conversion)
• Ingress Protection Compliance: Standard IP67 / IP68 protection rating (Hermetically sealed pressure-tight assembly execution)
• Structural Sleeve Material Composition: High-tensile premium-grade alloy stainless steel engineered for excellent pressure and corrosion tolerance
• Electrical Interfacing Layout: Pressure-resistant multi-pin industrial heavy-duty screw-threaded connectors or highly shielded oil-resistant molded signal cables
• Mounting Layout Integration: Deep integrated embedded mounting configurations inside heavy hydraulic cylinder rods, proportional/servo valve blocks, and heavy industrial press mechanisms