Order before 15:00 on business days? Shipped the same day!

Fast & reliable shipping throughout Europe

Expert customer service with professional advice

Mega Sale: Discounts up to 75%! While supplies last!

View Offers
Discover similar products: Autool, Paint thickness gauge
Autool  |  SKU: TG501

Autool TG501 | Paint thickness meter

€77,95 incl.
€64,42 excl.

Warranty directly via AsTools

We handle warranty cases ourselves, quickly and without involving the manufacturer. Thanks to our own parts inventory and technical expertise, we can usually assist you immediately. Only in exceptional cases do we still send the product to the supplier.

2 years warranty on all products

All our products come with a 2-year factory warranty. This ensures you long-lasting quality and service.

Easy returns

You can easily request your return through your account. We will send you the return label by email. Return shipping costs are your responsibility.

Professional customer service

Our experts are ready to help you quickly and professionally, both online and in our physical store. Questions? Feel free to contact us!

The Autool TG501 is a paint thickness gauge for steel and non-ferrous metals such as aluminium. It measures coating thickness from 0 to 2000 µm using magnetic induction on steel and the eddy current principle on non-ferrous metals. In AUTO mode it detects the substrate itself; with MAG and EDDY you select it manually.

Below 100 µm you read off 0.1 µm, with an accuracy of ±(3% + 1 µm). A galvanised substrate is detected separately (3 to 500 µm). The display rotates with the orientation of the device, and up to 80 readings can be stored with a sequence number. This allows you to compare panel by panel and trace overspray and filler.

HIGHLIGHTS

✔Steel and aluminium — Automatic substrate detection in AUTO mode.
✔Fine resolution — 0.1 µm below 100 µm, ±(3% + 1 µm).
✔80-reading memory — With sequence number, without noting down.
✔Rotating display — Readable under a sill or in a wheel arch.

POINTS TO NOTE

✕Measuring surface at least Ø15 mm — On a sharp seam or sharp edge the measurement is not reliable.
✕Curved surfaces — Minimum radius of curvature 5 mm convex and 25 mm concave.
✕Not for plastic — It does not measure bumpers and plastic parts.
✕Small differences — A few micrometres fall within the measurement uncertainty.

Applications and functions

The TG501 is intended for car dealerships, body repair shops, appraisers and private buyers who want to record the coating thickness of a bodywork rather than judge it by eye.

Measuring functions

  • Ferrous (MAG): Coating thickness on steel via magnetic induction.
  • Non-ferrous (EDDY): Coating thickness on aluminium and other non-ferrous metals via eddy current.
  • AUTO: Detects the substrate itself.
  • Galvanised steel: Separate detection from 3 to 500 µm.
  • Units: µm, mm or mil.

What you use it for

  • Pre-purchase inspection: Locating overspray and filler that are not in the history.
  • Appraisal and trade-in: Recording coating thickness per panel.
  • After body repair: Checking whether the new coating matches the surrounding panels.
  • Before polishing: Seeing how much paint is still there.

How to use it

  1. Switching on: The batteries are already included; switch the device on.
  2. Selecting the probe mode: AUTO, or MAG for steel and EDDY for aluminium.
  3. Zero calibration: Calibrate on the supplied reference plate or a bare piece of metal.
  4. Measuring: Place the probe straight and flat on the panel.
  5. Comparing: Measure each panel at several points and compare the values with each other.

Special functions and features

What makes the TG501 practical:

  • Zero calibration: With reference plates for steel and aluminium and calibration foils.
  • Beep tone: Confirmation with every measurement.
  • Clear reading: The last measurement or the entire memory.
  • Automatic switch-off: After 2 minutes without operation.

Package contents

  • 1x Autool TG501
  • 1x Set of calibration foils and reference plates (steel and aluminium)
  • 3x AAA batteries
  • 1x Wrist strap
  • 1x User manual
💡
Good to know: Measure each panel at three or four points and compare the readings with the surrounding panels, rather than relying on a single value. Factory paint is roughly the same thickness across the whole vehicle; a panel that is clearly thicker has almost always been refinished.

Technical specifications

Specification Description
Brand Autool
Model TG501
Type Paint thickness gauge, ferrous and non-ferrous
Measuring principle Magnetic induction (Fe), eddy current (NFe)
Probe types AUTO, MAG, EDDY
Measuring range 0 to 2000 µm
Galvanised substrate 3 to 500 µm
Resolution 0.1 µm (0 to 100 µm), 1 µm (above 100 µm)
Accuracy ±(3% + 1 µm)
Measuring speed Maximum 2 measurements per second
Minimum measurement area Ø15 mm
Minimum radius of curvature 5 mm convex, 25 mm concave
Minimum substrate thickness 0.30 mm steel, 0.05 mm non-ferrous
Units µm, mm, mil
Memory 80 readings
Display Backlit LCD, rotates automatically
Power supply 3 × 1.5 V AAA (included)
Auto power off After 2 minutes
Housing ABS, IP40
Operating environment −10 to 50 °C, 20 to 90% RH
Warranty 3 years device, 1 year accessories
Item number TG501