NM01PosiTestFM

The DEFELSKO PosiTest FM is a classic, mechanical (non-electronic) coating thickness gauge specifically designed for the non-destructive measurement of non-magnetic coatings on steel (ferrous) substrates. Known for its ruggedness, simplicity, and reliability, it is a "banana gauge" style instrument widely used in industries for quality control and inspection.

Key Features & Benefits:

• Magnetic Pull-Off Principle: The PosiTest FM operates on the magnetic pull-off principle. A permanent rare-earth cobalt magnet is brought into contact with the coated surface, and the force required to pull it away is directly proportional to the thickness of the non-magnetic coating (e.g., paint, enamel, plastic, galvanizing, metalizing, plating) over the steel base.

• Specifically for Ferrous Metals: The "FM" in the model name stands for "Ferrous, Magnetic," indicating its use exclusively on steel or iron substrates.

• Wide Measurement Range: The PosiTest FM model measures coating thickness from 0 to 80 mils (0 to 2000 microns), suitable for a broad range of applications from thin films to thick protective coatings like hot-dip galvanizing.

• High Accuracy: Offers an accuracy of ±0.2mils up to 4mils and ±5% of the reading over 4mils.

• Permanently Calibrated & Stable: The gauge is factory-calibrated and designed to maintain its calibration over time due to its permanent magnet. It comes with a Certificate of Calibration traceable to PTB (Physikalisch-Technische Bundesanstalt), ensuring accuracy and compliance.

• Mechanical, No Batteries/Electronics: A significant advantage is its entirely mechanical operation, meaning it requires no batteries or electronic components. This makes it inherently "explosion-proof" and safe for use in hazardous (explosive) environments like refineries, where electronic devices might be restricted.

• Rugged & Durable: Features an extra rugged housing that is highly resistant to mechanical shock, water, acids, and solvents, making it suitable for harsh industrial conditions.

• User-Friendly Design:

  • Positive visual and audible indicators confirm when a thickness reading has been established.

  • "V" grooves in the probe housing and gauge base allow for correct positioning on cylindrical objects.

  • Compact, lightweight, and precisely balanced, it is independent of gravity and can be used in any position.

  • A GO/NO-GO button can be pre-set for rapid pass/fail measurements.

  • One-finger operation for probe contact and dial rotation.

• Standards Compliance: Conforms to relevant national and international standards, including ASTM D7091/B499, ISO 2808, and others.

• DEFELSKO Quality: Manufactured by DeFelsko, a leading American manufacturer of coating inspection instruments, known for their uncompromising quality and reliability.

Specifications:

• Manufacturer: DeFelsko Corporation

• Model: PosiTest FM

• Measurement Principle: Magnetic Pull-Off

• Substrate Compatibility: Ferrous metals (Steel, Iron) only

• Coating Compatibility: Non-magnetic coatings (e.g., paint, enamel, plastic, galvanizing, metalizing, plating)

• Measurement Range (FM Scale): 0 to 80 mils (0 to approx. 2000 microns)

• Accuracy: ±0.2mils up to 4mils, ±5% of the reading over 4mils

• Power Source: No batteries or electronics required (mechanical operation)

• Probe: Integrated, highly wear-resistant Carbide Probe

• Dimensions: Approx. 8.5inches (L)×2inches (H)×1inch (W) (21.6cm×5.1cm×2.5cm)

• Weight: Approx. 6.1oz (0.17kg)

• Operating Temperature: 0∘C to 50∘C (32∘F to 120∘F) for the gauge and surface at the same temperature. Can measure on surfaces up to 100∘C (212∘F) if the gauge itself is kept within its operating range.

• Included: PosiTest FM gauge, wrist strap, neck strap, instruction manual, Certificate of Calibration, and a high-quality leather case with belt loops.

Typical Applications:

• Measuring paint and powder coating thickness on steel.

• Inspecting galvanizing, plating, or other non-magnetic protective coatings on steel and iron.

• Quality control in manufacturing, fabrication, and finishing industries.

• In-situ inspections in refineries, chemical plants, and other hazardous environments where electronic devices are not permitted.