Compact Paint Thickness Gauge HW-300 Max is a professional device for accurately measuring paint coatings on metallic and aluminum surfaces of cars. It is designed for detailed body diagnostics, detecting non-original paintwork and hidden repairs, which is especially important when evaluating a vehicle's condition before purchase.
The device can detect traces of repair after both major accidents and minor damages. Using the thickness gauge allows you to objectively assess the body's condition and, if necessary, reasonably negotiate a lower price for the vehicle.
To achieve maximum measurement accuracy, the device must be held strictly perpendicular to the surface. HW-300 Max automatically recognizes the base material: steel (Fe) or non-ferrous metals such as aluminum and copper (NFe).
Key features and functions:
- Measurement in three units: millimeters (mm), microns (µm), and mils (mil).
- Switching between units is done with a button.
- Built-in display backlight for convenient operation in low-light conditions.
- Display of measurement count since power-on.
- Automatic shutdown after inactivity to save battery.
Package contents:
- Metal calibration plate.
- Test plates for verifying device operation.
- Batteries not included (requires 2×AAA 1.5V batteries).
Calibration process:
- Turn on the device by holding the button until dashes appear on the screen.
- Long-press the second button until the flashing "Zero Call" message appears.
- Perform calibration according to the instructions.
Detailed calibration and usage guide available via link: HW-300 Max Calibration and Usage Instructions.

Technical specifications:
| Parameter | Value |
|---|---|
| Dimensions (L×W×H) | 85 × 40 × 25 mm |
| Resolution | 0.01 mm / 1 mil |
| Measurement range | 0–2000 µm |
| Accuracy | ±(3% + 1 µm) |
| Power supply | 2×AAA 1.5V |
| Operating temperature | –10°C to +50°C |
| Auto power off | Yes |
| Display backlight | Yes |
| Automatic material detection | Fe (steel) / NFe (aluminum, copper) |
Advantages of using HW-300 Max:
- Professional diagnostics: Detects hidden damages and repairs.
- Versatility: Works with metallic and aluminum surfaces.
- High accuracy: Error margin of only ±3% + 1 µm.
- Compact and ergonomic: Small size and convenient controls.
- Power saving: Auto shutdown feature.
- Clear display: Backlight for operation in any conditions.
The HW-300 Max paint thickness gauge is an essential tool for auto repair shops, vehicle appraisers, car dealers, and private individuals who want to check a vehicle's body condition before purchase or sale. It provides accurate data, enabling informed decisions and helping to avoid hidden issues.
Before first use, be sure to calibrate the device and read the complete instructions to ensure measurement accuracy and device longevity.
| Model | Accuracy | What it means in practice | Error risk | Recommendation |
|---|---|---|---|---|
| HW300 | ±20–30 µm | May not detect difference between factory paint and repairs | ❌ High | Only for basic checks |
| HW300S | ±10–20 µm | Can detect repaint, but not always precisely | ⚠ Medium | Minimum acceptable option |
| HW300 MAX | ±5–10 µm | Clearly detects repainted elements | ✔ Low | ? BEST CHOICE |
| HW300 PRO | ±1–5 µm | Detects even minimal differences | ✔ Minimal | Professional level |
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★★★★★
Сделал по несколько замеров в одной точке — результаты повторяются с небольшим разбросом.
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★★★★★
Друг посоветовал этот прибор, когда узнал, что я присматриваю машину на вторичке. С ним сразу проверил несколько вариантов и на одном нашел крашеную дверь. Компактный, подсветка помогает в пасмурную погоду.
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★★★★★
Подарил брату на день рождения, он часто смотрит машины. Ему очень понравился: сразу протестировал на своей, нашёл небольшой подкрас на двери.
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★★★★★
Оказалось, одно крыло крашено, хотя продавец уверял, что всё оригинал. Прибор компактный, показывает точно, заряд держит хорошо.
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★★★★★
Пользуюсь этим прибором уже три года, проверил больше ста машин. Ни разу не подвёл, показания точные, подсветка выручает в тёмных гаражах. С ним нашёл не одну крашеную панель. Батарейки хватает надолго, менял всего раз.
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★★★★★
Vecais biezuma mērītājs beidza strādāt, nopirku šo kā aizstājēju. Jaunais ir daudz ērtāks un precīzāks, displejs ar apgaismojumu lieliski noder.
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★★★★★
Draugs ieteica šo mērītāju, jo pats lieto jau ilgāku laiku. Nopirku un esmu priecīgs – palīdzēja atklāt slēptu defektu automašīnai, kuru grasījos pirkt. Viegli lietojams, uzreiz parāda, kur ir remontēts.
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★★★★★
Ikdienā pērku un pārdodu lietotus auto, tāpēc bez krāsojuma mērītāja nevaru iztikt. Šis modelis ir ērts, ātrs un precīzs. Ekrāna apgaismojums palīdz pat tumšās garāžās. Par cenu – izcila vērtība.
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★★★★★
Jau lietoju šo ierīci ikdienā, bet nopirku otru kā rezervi darbnīcai. Tā vienmēr ir uzticama, un ar to var ātri atklāt slēptos remontdarbus.
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★★★★★
Pirms pasūtīšanas pārbaudīju, ka krāsas biezuma mērītājs der modelim HW-300.