The Messotron DF Series Linear Inductive Displacement Transducers / Mechanical Gauge Probes represent a top-tier, high-precision contact measurement family, meticulously engineered and manufactured at Messotron's state-of-the-art facilities in Germany. The series consolidates comprehensive technical models including the DF 6, DF 12, DF 20, DF 25, DF 50, DF 80, DF 100, and DF 130. Operating on the trusted Linear Variable Differential Transformer (LVDT) principle, these instruments integrate a near-frictionless ball-bearing guided measuring shaft alongside an internal heavy-duty return spring mechanism. The DF family is intensely optimized for strict industrial metrology and mechanical dimensioning applications, where direct surface contact is essential to determine precise material thickness, flatness tolerances, concentricity errors, structural bending, or to detect micro-scale geometric variations within high-speed automated quality assurance (QA/QC) validation loops.

The core engineering advantage of the Messotron DF Series centers on its highly compact, pen-style/gauge-type structural layout, which allows for smooth integration into high-density, multi-gauging fixtures where installation layout space is heavily constrained. The internal mechanical spring tension is meticulously balanced to ensure the durable probe tip continuously and firmly tracks the exact contours of the moving workpiece without generating physical scratches or surface marring on sensitive materials. With a wide range of measuring ranges, system layout engineers can seamlessly choose from micro-measurement variants like the DF 6 (delivering a 6mm total stroke capacity) up to extended medium and long-travel configurations including the DF 12, DF 20, DF 25, DF 50, DF 80, DF 100, and the heavy-duty DF 130 featuring a total linear travel capacity of up to 130mm, perfectly covering all standard industrial component scales.

The internal moving core shaft is fabricated from specialized high-permeability magnetic alloys combined with Germany's strict symmetrical coil winding methods, completely eliminating physical magnetic hysteresis and minimizing thermal output drift caused by ambient factory floor temperature fluctuations. The external casing is machined from industrial-grade, polished stainless steel and hermetically sealed to comply with IP65/IP67 ingress protection standards. This robust steel armor forms an impenetrable barrier shielding the sensitive internal coil structures from abrasive grinding dust, splashing fluids, CNC coolant mist, and severe electromagnetic interference (EMI) fields emitted by nearby heavy machinery. The raw AC output signaling delivers maximum signal reliability. When paired with Messotron's external carrier frequency amplifier modules, it smoothly transitions into industry-standard analog protocols like 4-20mA or 0-10V, allowing flawless data routing into PLC nodes or dedicated manufacturing execution software. This sensor series acts as a technical backbone for multi-point inspection benches in automotive assembly yards, glass/display flatness validation lines, cold-rolled sheet metal thickness monitoring systems, and national-level metrology laboratories.

• Manufacturer: Messotron
• Country of Origin: Germany
• Product Category: Inductive Linear Variable Differential Transformer Gauge Probes (LVDT)
• Grouped Consolidated Model Registries: DF Series (MESSOTRON DF 6, DF 12, DF 20, DF 25, DF 50, DF 80, DF 100, DF 130)
• Measuring Principle: Linear Variable Differential Transformer - Contact spring-loaded push probe mechanics
• Linear Measuring Ranges and Stroke Capacity per Model Designation:
  - Model DF 6: Range ± 3 mm (Total linear stroke 6 mm)
  - Model DF 12: Range ± 6 mm (Total linear stroke 12 mm)
  - Model DF 20: Range ± 10 mm (Total linear stroke 20 mm)
  - Model DF 25: Range ± 12.5 mm (Total linear stroke 25 mm)
  - Model DF 50: Range ± 25 mm (Total linear stroke 50 mm)
  - Model DF 80: Range ± 40 mm (Total linear stroke 80 mm)
  - Model DF 100: Range ± 50 mm (Total linear stroke 100 mm)
  - Model DF 130: Range ± 65 mm (Total linear stroke 130 mm)
• Actuation Mechanism: Integrated internal mechanical return spring (Spring-loaded contact)
• Full Scale Linearity Deviation Error: Ultra-low error threshold of ≤ ±0.25% to ±0.5% depending on model configuration
• Measurement Repeatability: Reaches optimal levels of < 1 µm under controlled standard laboratory parameters
• Electrical Output Protocol: Raw unconditioned alternating current AC output (Requires external carrier frequency amplifier for 4-20mA / 0-10V conversion)
• Ingress Protection Compliance: Standard IP65 class, upgradable to IP67 with hermetically sealed cable layouts
• Housing Structural Composition: Premium-grade stainless steel engineered for high impact and wear resistance
• Probe Stem Outer Diameter: Standard industrial cylindrical outer profile tailored for universal mounting blocks
• Permissible Operating Thermal Range: -20°C to +80°C (Extended operational tolerances from -40°C to +120°C available for specialized demands)
• Electrical Interfacing Layout: Integrated highly shielded molded signal cable or heavy-duty screw-threaded multi-pin connectors