The professional paint thickness gauge HW-300 Pro is a precise and reliable tool for comprehensive diagnostics of a car's body condition. The device is designed to measure the thickness of paint, primer, and varnish on metallic, steel, and aluminum surfaces, making it an indispensable assistant for evaluating a car before purchase, identifying hidden repairs after accidents of varying severity, and controlling painting quality.
Using the thickness gauge allows you to detect signs of non-factory painting, body filler, and local repairs, which may indicate a vehicle's accident history. The obtained data provides an objective basis for price negotiation or making an informed decision about the advisability of a purchase.
To quickly master the device, we recommend familiarizing yourself with the detailed calibration and usage instructions for HW-300 Pro.

Key Features and Operating Principle
To ensure maximum measurement accuracy (error only ±(3%+1 µm)), the device's sensor must be positioned strictly perpendicular to the surface being tested. The HW-300 Pro automatically recognizes the base material type (ferromagnetic metal or non-ferrous metals like aluminum and copper), eliminating operator error.
The device supports multiple measurement units, switchable with one button:
- Micrometers (µm)
- Millimeters (mm)
- Mils (1 mil = 0.001 inch)
The built-in LCD backlight ensures clear visibility of readings in any lighting conditions.

Technical Specifications
| Parameter |
Value |
| Measuring Range |
0–2 mm (2000 µm) |
| Resolution |
0.01 mm / 1 mil |
| Accuracy |
±(3% of reading + 1 µm) |
| Operating Temperature |
-10 °C to +50 °C |
| Power Source |
2 AAA 1.5V batteries |
| Dimensions (L×W×H) |
122 × 50 × 22 mm |
| Weight (without batteries) |
~90 g |
Package Contents
- HW-300 Pro Paint Thickness Gauge
- Calibration plates (standards)
- Protective carrying case
- User manual in English
Note: AAA batteries are not included.
Comparison with Other Models
| Model |
HW-300 Pro |
HW-300S |
HW-300 Max |
| Automatic Material Recognition |
Yes (Fe / NFe) |
Yes (Fe / NFe) |
Yes (Fe / NFe) |
| Measuring Range |
0–2 mm |
0–2 mm |
0–5 mm |
| Display Backlight |
Yes |
Yes |
Yes |
| Calibration Plates Included |
Yes |
Yes |
Yes |
| Resolution |
0.01 mm |
0.01 mm |
0.01 mm |
Applications
- Used Car Inspection Before Purchase: Quick body check for repainted elements to identify hidden defects and accident repairs.
- Quality Control in Auto Shops and Body Shops: Checking paint thickness after filling, priming, and painting to comply with technical standards.
- For Insurance Companies and Appraisers: Objective determination of the extent and quality of restoration repairs after accidents.
- For Private Users: Monitoring your own vehicle's condition and verifying results from third-party services.
The HW-300 Pro paint thickness gauge is a professional solution for accurate and fast diagnostics that combines high precision, ease of use, and affordable price. It comes with an official warranty and is available for order with delivery throughout Europe.