PosiTest DFT

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Dry-Film Thickness Gauge for All Metal Substrates

A Straightforward, Economical Solution Without Compromise

The PosiTest DFT provides fast, reliable measurement of non-magnetic coatings on steel—and, in its Combo version, on aluminum, brass, and other non-conductive metals. As a simplified yet high-quality tool, it delivers the precision of DeFelsko technology without unnecessary extras, making it perfect for those needing essential functionality at a competitive price.

Supplied in the UK by DFT Instruments, each gauge arrives calibrated, certified, and supported locally—helping you stay accurate and audit-ready with ease.

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Features

2 Versions Available – Choose from the Ferrous model (for steel) or the Combo model (for both steel and non-conductive metals such as aluminum and brass).
High-Speed Readings – Capture more than 60 measurements per minute for rapid, repeatable results.
Ready to Go – Factory calibrated, requiring no adjustments for most common applications.
Flexible Calibration Options – Apply zero or single-point calibration for enhanced accuracy on complex or unusual surfaces.
On-Gage Averaging – Automatically calculates and displays the average of up to 99 individual readings.
Durable Ruby-Tipped Probe – Provides long-lasting performance, even on rough or abrasive surfaces.
Clear, Adjustable Display – Brightness control ensures optimal visibility in any lighting environment.
Smart Screen Rotation – Auto-rotating display with optional lock for consistent orientation.
Simple User Interface – Intuitive, icon-driven menu system for easy operation.
Traceable Calibration Certificate – Supplied with a long-form certificate demonstrating traceability to PTB.
International Standards Compliance – Conforms to ISO 2178/2360/2808, ISO 19840, ASTM B244/B499/D7091/E376, BS3900-C5, SSPC-PA2, and more.

Why Measuring Matters

Precision Where It Counts
Ensures coatings meet specified thickness for protection, longevity, and performance.
Boost Efficiency
Provides over 60 readings per minute, greatly improving inspection speed.
Ideal for Value-Oriented Applications
Perfect for tasks where advanced data logging or PosiSoft connectivity isn’t required—but quality is.
Adaptable to Curved Parts
Its probe’s V-groove makes measuring pipes and cylindrical objects quick and easy.
Clear Results, Minimal Setup
Ready to use right out of the box—with optional zero or single-point calibration for precision adjustments.
Minimises Costly Rework
Re-sprays and material wastage drive up costs. By confirming correct thickness during application, inspectors and applicators can reduce waste and avoid rejected parts.
Critical for Mixed-Metal Projects
Many modern projects involve both ferrous and non-ferrous metals. The Combo model of the PosiTest DFT allows fast measurement on both steel and aluminum, making it easier to verify across different substrates without interruption.

Why Choose DFT?

Over 25 Years of Expertise
Since 1998, DFT Instruments has been trusted across the UK to supply and support coating inspection equipment. Our experience ensures every customer gets the right gauge and the knowledge to use it effectively.
Official UK Distributor for DeFelsko
Buying through us guarantees you a genuine PosiTest DFT, backed by DeFelsko’s international reputation and warranty, plus local UK-based support.
Certified Calibration Included
Every gauge is supplied with a long-form calibration certificate traceable to PTB/NIST, meeting the documentation requirements for audits and quality systems.
Local Calibration & Repair
Our UK-based Authorised Service Centre provides recalibration and servicing with same-day or next-day turnaround, so you don’t lose valuable time.
Practical Support & Training
Our team is on hand to provide guidance—whether you’re selecting the right model, learning best practices, or troubleshooting issues on site.

Features & Benefits

Choice of Models – Select the Ferrous-only gauge for steel applications, or the Combo version for both steel and non-conductive metals like aluminum and brass.
Fast Measurement Speed – Take over 60 readings per minute, making it efficient for production lines and large projects.
Factory Calibrated – Ready to use out of the box. Optional zero or single-point calibration available for complex or unusual surfaces.
Digital Averaging – Displays the average of up to 99 readings, ensuring more representative results across textured or variable surfaces.
Durable Construction – A rugged, ruby-tipped probe ensures long life, even when used on rough or abrasive coatings.
User-Friendly Interface – Simple, icon-based menu system with a one-button RESET function makes operation straightforward, even for new users.
Adaptive Display – Screen automatically rotates to match measurement orientation, with a brightness control for optimal visibility in any lighting environment.
Versatility on Shapes – Built-in V-groove makes it easy to take repeatable measurements on curved objects such as pipes and cylinders.
Compact & Portable – Lightweight design (just 54 g without batteries) with included wrist strap and carrying case, ideal for inspections in the field.
Standards Compliant – Conforms to international norms including ISO 2178/2360/2808, ISO 19840, ASTM B244/B499/D7091/E376, BS3900-C5, SSPC-PA2, and more.
Traceable Calibration – Each gauge is supplied with a certificate showing full traceability to recognised metrology standards, ensuring confidence in every reading.

Technical Specifications

Specification	Details
Measurement Range	0 – 40 mils / 0 – 1,000 µm
Accuracy	±(0.1 mil + 3%) / ±(2 µm + 3%)
Size	108 × 43 × 20 mm (4.25″ × 1.7″ × 0.8″)
Weight	54 g (1.9 oz) (without batteries)
Certifications	Includes long-form calibration traceable to PTB/NIST
Kit Includes	Wrist strap, precision shims, hard shell case, 2 AAA batteries, instructions, calibration certificate, 2-year warranty

Comparison Table: PosiTest DFT Model Comparison

Feature / Capability	PosiTest DFT Ferrous (DFTF)	PosiTest DFT Combo (DFTC)
Substrate Compatibility	Measures non-magnetic coatings only on steel	Measures on both steel and non-conductive metals like aluminum and brass
Automatic Substrate Detection	Not applicable	Automatically detects substrate type for seamless switching
Recommended For	Users working exclusively with steel substrates (e.g., powder coaters)	Users coating a range of metals, including aluminum, brass, and mixed metal batches
Typical Users	Powder coaters, painters, refinishers who primarily work on steel	Automotive, refinish, and industrial users requiring multi-metal capability

Additional Differences:

Both models offer 60+ readings per minute, averaging display, auto-rotating screen, and reset features.
The Combo version provides added flexibility for inspection workflows that include various metals—without needing to swap gauges or change probes.

These enhancements make the Combo model particularly policy-friendly for sites handling multiple materials, while the Ferrous model offers a budget-conscious, streamlined solution.

FAQ’s

Do I need to calibrate it before use?

No. The gauge is factory calibrated and ready to measure straight out of the box. For more complex surfaces, you can apply a zero or single-point calibration adjustment for improved accuracy.

What’s the fastest measurement speed?

The PosiTest DFT can capture over 60 readings per minute, making it one of the fastest gauges in its class. This is ideal for production lines, automotive refinishing, or repetitive quality checks.

What is the difference between the Ferrous and Combo models?

Ferrous (DFTF): Designed to measure non-magnetic coatings on steel only.
Combo (DFTC): Measures coatings on both steel and non-conductive metals like aluminum and brass, automatically recognising the substrate.

Can it measure on curved or small parts?

Yes. The probe has a built-in V-groove, which makes it easy to take stable, accurate readings on cylindrical objects such as pipes, rods, or tubing.

What kind of display does it have?

The PosiTest DFT features a high-contrast digital display with adjustable brightness for all lighting conditions. The screen auto-rotates for ease of use in any orientation, and a rotation lock can be applied if preferred.

What standards does the PosiTest DFT comply with?

It conforms to a wide range of international standards, including ISO 2178/2360/2808, ISO 19840, ASTM B244/B499/D7091/E376, BS3900-C5, SSPC-PA2, and more.

How rugged is the probe tip?

The probe is ruby-tipped, giving it superior wear resistance. This ensures accuracy and durability even on abrasive or rough coatings, making it suitable for long-term field use.

What’s included with the gauge?

Each unit is supplied with a wrist strap, protective carrying case, precision shims, AAA batteries, instructions, and a calibration certificate, along with a two-year warranty for peace of mind.

Still need help?
If you experience an issue, check our troubleshooting guide or contact our support team directly. As a DeFelsko Authorised Service Centre (DASC), DFT Instruments provides calibration, repair, and technical assistance locally in the UK.

Find out more about the PosiTest DFT and all the features that come with it

Literature

Find useful instruction manuals and quick guides for the PosiTest DFT

Accessories

All the useful accessories to accompany your PosiTest DFT can be found here.

What’s Included:

Every PosiTest DFT gauge is supplied as a complete kit, ready for immediate use:

PosiTest DFT Gauge (Ferrous or Combo model)
Long-Form Certificate of Calibration (traceable to PTB/NIST)
Protective Hard-Shell Carrying Case
Precision Plastic Shims for verification
2 × AAA Alkaline Batteries (pre-installed)
Wrist Strap for hands-free security during use
Printed Instructions & Quick Reference Guide
2 Year Manufacturer Warranty

Need straight-ahead, dependable coating thickness readings for metal substrates? The PosiTest DFT is your go-to—no frills, no fuss, just precise measurements.

📞 To enquire about this product, contact our team today on: 01442 879494 or Complete the form.