A buyer’s read on the DeFelsko PosiTector 6000 FTS3: an Advanced body paired with a removable, cabled FTS probe for thick nonmagnetic coatings on ferrous metal substrates.
Start with the coating and substrate, not the feature list. FTS3 is not a universal “all metals” or magnetic-coating gauge. The 2025 model guide identifies the FTS probe for thick protective coatings on ferrous metal substrates, including thick epoxy, rubber, and intumescent fireproofing.[3] This review considers prepared, nonhazardous coated ferrous samples where coating thickness is the question—not fireproofing performance or structural acceptance. It is the wrong shortcut if your work routinely moves between ferrous and non-ferrous substrates, or if the listing’s generic “all metals” wording is being treated as the model’s actual probe specification.[4]
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What the FTS3 measures
The stated FTS range is 0–250 mils, 0–6 mm, and 0–6000 µm.[3] Those are the maker’s separately published unit ranges. The guide states accuracy as a fixed value plus a percentage of the gage’s actual reading.[3]
- 0–100 mils: ±(0.5 mils + 1% of the actual reading).[3]
- Above 100 mils: ±(0.5 mils + 3% of the actual reading).[3]
- 0–2.5 mm: ±(0.01 mm + 1% of the actual reading).[3]
- Above 2.5 mm: ±(0.01 mm + 3% of the actual reading).[3]
These are band-specific stated accuracy figures, not an achieved uncertainty claim for your part, coating, operator, or surface.[3] Do not replace the two mil bands with a single “±1%” headline. The higher band matters when thick fireproofing, rubber, or epoxy is near the upper half of the FTS range.
Resolution, speed, and records
Hi-Res changes displayed resolution; the manual expressly says accuracy is not affected.[2] Fast mode increases measurement speed and the manual warns that reduced accuracy may be noted.[2] Use that mode as an inspection convenience, not evidence that a rapid pass has the same conditions as a carefully positioned reading.
Advanced-body documentation describes storage of 250,000 readings in up to 1,000 batches, while the model guide lists statistics, live graphing, prompted batches, and three scan modes for the Advanced configuration.[2][3] Scan statistics and Limited Count Average are summaries: the manual says that in those modes only the statistics and/or average is saved, not individual readings.[2] If a job requires every probe event, choose the recording mode deliberately and confirm the delivered firmware behavior.
Calibration is three different things
Do not use “calibration” as a catch-all. The manual separates manufacturer calibration, user verification, and adjustment.[2] The manual says probes are factory calibrated and include a Certificate of Calibration.[2] Verification is the user’s check against a known standard, such as a plastic shim or coated thickness standard.[2] Adjustment aligns readings to a known sample to improve accuracy on a specific surface or a defined portion of the range.[2]
For records on prepared coated samples, that distinction matters. Substrate shape, composition, and surface roughness can influence readings, so a zero check or a known-thickness check on a representative uncoated area should be part of the work instruction.[2] The manual describes one-point and two-point adjustments; two-point adjustment provides greater accuracy within a limited, defined range.[2] It also documents stored Cal Memory settings and Cal Lock.[2] Record which adjustment, substrate, coating condition, probe position, units, and time were used.
Reset is not a harmless calibration button. The manual says it erases batches, stored measurements, batch names, screen captures, and calibration adjustments before returning settings to factory defaults.[2] Preserve records before any reset and do not treat a reset or a forgotten-lock workflow as a substitute for controlled verification.
Current documents versus the shipped instrument
The 2025 FTS3 guide lists the gage body and FTS probe with precision plastic shims, a rubber holster, wrist strap, three AAA alkaline batteries, instructions, a lens shield, hard case, USB cable, PosiSoft software, and a Long Form Certificate of Calibration traceable to NIST or PTB.[3] These are documented package contents, not an inspection of the seller’s carton or its individual certificate. Check the actual configuration if your decision depends on a specific accessory or certificate.
The downloadable documents do not establish the feature set of every unit offered today. The model guide is marked ©DeFelsko Corporation USA 2025 and identifies FTS3 as the Advanced body with the 6000 FTS probe.[3] The operating manual is a current downloadable document in this review, but its instructions also say to update the gage for the latest on-gage help information.[2] Treat both as documentation of the stated configuration and functions, not proof of the firmware, connector, battery, software-host compatibility, or included accessories in a particular carton.
The maker’s current family page describes touchscreen, USB, WiFi, Bluetooth, software, and higher-level reporting routes for the PosiTector 6000 family.[1] That establishes current family-level documentation, not a verified shipped-revision parity test for this exact retail unit. The family page also describes current Advanced storage and scan features, while the offer’s “Date First Available” is October 10, 2011.[1][4] That date is not the stock year. Before relying on wireless sync, cloud reporting, touchscreen behavior, storage capacity, or a long-form certificate, ask the seller to confirm the exact body/probe revision and carton contents.
Who should buy it
FTS3 fits a buyer who needs non-destructive thickness records for thick protective coating work on ferrous steel or iron, and who can control measurement location, probe placement, verification standards, and adjustment records. It is especially relevant when a removable cabled probe helps reach the measurement point while the Advanced body keeps organized batches and summaries. This review does not establish fireproofing performance, coating acceptance, structural safety, diagnosis, or compliance. A thickness number alone does not supply those conclusions.
The offer reviewed here identifies DeFelsko, model PosiTector 6000 FTS3, ASIN B009VR05BW, with the seller shown as Neobits_ and availability shown as usually shipping within 4 to 5 weeks.[4] Confirm current price, stock, exact revision, certificate, probe, and accessories at checkout rather than treating a retail page or family guide as a guarantee.
The buying decision
Buy the FTS3 when the job is thick coating measurement on ferrous substrates and your process values band-specific accuracy, representative-surface verification, and documented readings. Pass when you need all-metal coverage, guaranteed current wireless/software features, or a result that by itself proves coating acceptance or safety. The defensible purchase is the one whose shipped body, FTS probe, revision, standards, and record workflow match the inspection you perform.
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Sources
The operating manual contains 56 physical pages, with the English section on physical pages 3–15. The model guide identifies the current documented FTS3 configuration; neither document establishes the revision or certificate shipped with an individual order.