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The NexPTG PRO Carbon with Calibration Certificate is NexDiag's flagship paint coating thickness gauge, built for detailers, appraisers, insurers and bodyshops who need measurements that hold up as evidence, not just a working gauge. It shares every feature of the standard PRO Carbon, an extended 0–3000 micron range, 8000-reading memory, VIN scanner, voice control and smartwatch pairing, and adds one thing the rest of the range doesn't have: an official calibration certificate issued by an external, accredited certification company, confirming this specific unit meets NexDiag's stated accuracy parameters.
0–2500µm · 4000 readings · core features
0–3000µm · 8000 readings · VIN reader, voice control
Same as PRO Carbon, plus accredited calibration certificate
Issued by an external, accredited certification company for this specific unit, giving you documented, defensible accuracy for formal reports and appraisals.
Covers thin factory paint through to thick filler or multi-layer refinish work, with 1 micron resolution.
Scan a VIN with your phone's camera to auto-populate vehicle data, and operate the whole workflow hands-free by voice.
The only NexPTG model that connects to a Wear OS or WatchOS smartwatch, so you can take readings without pulling out your phone.
| Spec | Detail |
|---|---|
| Measurement range | 0–3000 µm (0–118.11 mils) |
| Measurement resolution | 1 µm (0.04 mils) |
| Probe type | Movable, spherical tip, profiled housing |
| Curve measurement | Yes |
| Substrate recognition | Steel, galvanised steel, aluminium |
| Zinc detection | Up to 1000 µm |
| Coating analysis system (PAS) | Extended ver. 2 |
| Measurement memory | Up to 8000 readings |
| Measurements per second | 10 |
| Communication | Bluetooth 4.0 LE |
| Calibration certificate | Yes, accredited third-party (EN) |
| VIN code reader | Yes |
| Voice control | Yes |
| Smartwatch app | Yes (Wear OS / WatchOS) |
| Report bodies | 100+ individual, personalised vehicle bodies |
| Report generation & export | Yes, via NexPTG app (email export) |
| Battery life | Up to 100 hours continuous, 2x AA |
| Operating temperature | -20°C to +40°C |
| Housing colour | Carbon |
| Weight | 58g (without batteries) |
| Size | 112 x 50 x 28 mm |
| App compatibility | Android 5.0+ (Bluetooth LE), iOS 11+ / iPhone 6s or later |
| Warranty | 36 months |
Not sure this is the right model? See the full NexPTG comparison and buying guide to check it against the rest of the range.
I'm Nick, founder of Detailing Shed. Over the years I've used paint thickness gauges on a lot of vehicles, and it's changed how I approach every correction job.
I've picked up resprayed panels that looked completely normal to the eye. No colour mismatch, no overspray, nothing you'd catch just walking around the car. The gauge told a different story. I've also come across vehicles with real variation in paint thickness from panel to panel, the kind of pattern that usually points to repair work at some point, even when there's no paperwork or visible sign of it.
A few times I've had a reading come back a lot lower than expected on a panel. That's not a good moment. It means there isn't enough paint or clear coat left to safely do the level of correction the customer originally asked for. Without the gauge, I wouldn't have known that until it was too late, and cutting through clear coat isn't something you can undo.
Having that number in front of me before I pick up a machine means I'm making an informed call, not a guess. It takes the risk off the customer's paint, and off my reputation. That's really what a paint thickness gauge does: it removes the guesswork. You know exactly what you're working with before you touch the paint, not after.
You can't safely remove paint if you don't know how much of it you've actually got. Finding a repair, filler, a respray, or paint that's thinner than it should be before you start polishing can save real time, real money, and in some cases stop you doing damage to a car's paint that can't be undone.
If you're serious about paint correction, a paint thickness gauge should be considered essential equipment, not an optional accessory.
Nick, Founder, Detailing Shed
It measures the exact depth of paint, primer and clear coat on a vehicle's panels, in microns. Detailers use it to check for previous respray or filler work before quoting a correction, track how much clear coat is being removed during machine polishing, and establish a safe baseline before applying paint protection film or a ceramic coating.
Identical hardware and specifications. This version simply includes an official calibration certificate from an external, accredited certification company, confirming the unit meets NexDiag's stated accuracy parameters. It matters for anyone producing paint reports for insurers, appraisers or used-car buyers who need certified, defensible measurements, not just a working gauge.
Yes. The NexPTG PRO Carbon automatically recognises and measures steel, galvanised steel and aluminium substrates, covering the mixed-material panels found on most modern vehicles.
It measures from 0 to 3000 µm (0 to 118.11 mils) with a resolution of 1 µm, taking up to 10 measurements per second through a spherical probe rated for both flat and curved panels.
The gauge itself has no display; all readings are sent via Bluetooth 4.0 LE to the free NexPTG app on iOS (11+, iPhone 6s or later) or Android (5.0+ with Bluetooth Low Energy), where measurements, reports and vehicle data are recorded. It also pairs with a Wear OS or WatchOS smartwatch for hands-free measuring.
Yes. Factory paint typically reads within a consistent, narrow range, so a noticeably thicker or inconsistent reading across a panel usually indicates filler, respray or replacement work.
It's not required for routine correction and coating work, but it's worth it for anyone producing formal condition reports, working with insurers or appraisers, or wanting documented proof of accuracy behind every quote.
| Document Name | File Type | |
|---|---|---|
| Report NexPTG Pro Carbon |
Please allow extra time for delivery to regional and remote areas.
Free Shipping on orders over $150 excluding remote areas and certain weight restrictions apply for free shipping in each state. Trade accounts $250 minimum for free shipping.
The following qualifies for free shipping:
For orders with free shipping, we determine whether to use a courier service or Australia Post based on the address. If you prefer your order to be shipped via Australia Post, please select the "Parcel Post" option at checkout.
Note: We do not ship to PO Boxes or Parcel Lockers with free shipping.
If your parcel is returned to us, the following conditions outline when additional shipping costs may apply:
*We will not be held responsible for delays or late delivery of Australia Post or courier services.
*If a parcel does not arrive as anticipated, please allow 5-7 working days for Australia Post or couriers to complete process of tracking and locating as in most cases it turns up after 3-7 days of expected delivery. We cannot refund or send another item until this process is completed.
*We don't take responsibility for orders that are lost or stolen once the parcel has been delivered to the correct delivery address.
*Items that are over 21kg may require to pay extra freight costs if in regional or remote areas - we will contact you if this is the case.
All of our prices are in Australian dollars (AUD) and include GST (Goods and services tax)
At Detailing Shed, we're committed to supplying premium-grade car care products. Please review the following before submitting a return or refund request.
Version 1.2 · Last updated: 18 August 2026
| Topic | Summary |
|---|---|
| Change-of-mind returns | Store credit only, within 30 days of delivery, unopened & unused |
| Restocking fee | 10% of item price |
| Return shipping | Paid by the customer |
| Non-returnable | Chemicals/liquids, Ceramic Coatings, and all Kranzle & Big Boi products |
| Faulty / damaged / incorrect items | Report within 10 days: repair, replacement or refund, no fee |
| Order cancellation (before dispatch) | Refund to original payment method, minus 3% transaction fee |
| Missing deliveries | Allow 7–15 business days after carrier investigation begins |
| New Zealand orders (polishers/buffers & pressure washers) | Customer pays return shipping for repair, inspection or warranty claims, even if a fault is confirmed |
Nothing in this policy limits or replaces your rights under the Australian Consumer Law (ACL). If a product has a major or minor failure (for example, it's faulty, unsafe, not fit for purpose, or significantly different from how it was described), you're entitled to a repair, replacement, or refund under the ACL, regardless of the store credit, restocking fee, or timeframe terms below.
The terms in the rest of this policy apply to change-of-mind returns and other situations that aren't covered by a consumer guarantee.
We accept change-of-mind returns for store credit only, on items that are unopened and unused, within 30 days of the delivery date.
Due to safety, hygiene, and quality control, the following are never eligible for change-of-mind return:
Unused, unopened accessories such as brushes, pads, and towels may be eligible, subject to approval from our team. Email us first with your order number and photos before sending anything back.
If you believe a product isn't working properly, contact us first rather than returning it straight away. Here's how we handle it:
If you've told us in advance the specific job you needed a product to do and it can't do that job, let us know. That can still count as a failure under the ACL even if the product otherwise works normally.
For orders shipped to New Zealand, if a polisher/buffer or pressure washer needs to be sent back to us for inspection, repair, or a warranty claim, return shipping is paid by the customer. Given the cost of international freight, we're not able to cover shipping on these two product categories for New Zealand orders, even where a fault is confirmed.
Yes, if you ordered the wrong product, return it under the policy above and place a new order for the correct item.
You can cancel an order any time before it's been processed or shipped. A 3% transaction fee (covering payment processing costs) is deducted from the refund; the remainder goes back to your original payment method.
Once an order has been processed or dispatched, it can no longer be cancelled, but you can still return the items under the Change-of-Mind Returns policy above.
Notify us within 10 days of delivery at info@detailingshed.com.au with your order number and clear photos. We'll arrange a replacement, or a refund if stock isn't available, at no cost to you. If we need the item sent back to us first, we'll cover or reimburse that return shipping too, since the item is faulty, damaged, or incorrect rather than a change of mind (this doesn't apply to New Zealand orders for polishers/buffers and pressure washers, per above).
For any return worth over $50, we recommend a trackable shipping service or shipping insurance. We're not responsible for returned items lost in transit.
If your order hasn't arrived, please allow 7–15 business days after Australia Post or the courier begins their investigation. We'll be in touch once it's resolved and any refund or replacement has been processed.
Product packaging or colours may differ from the images on our site due to manufacturer updates. This isn't grounds for a refund unless the product itself is faulty or incorrect.
Discount codes must be applied at checkout and can't be added retroactively to an existing order, and we can't refund the difference after an order is placed. Double-check your code before completing checkout. If it's not working, contact us before you finalise your purchase.
| Version | Date | Changes |
|---|---|---|
| 1.0 | 18 Aug 2026 | Initial rewrite: added the Australian Consumer Law rights section, the “isn’t performing” walkthrough, the at-a-glance summary table, and this version history. Clarified the Kranzle/Big Boi exclusion covers the full brand range (not just liquids/chemicals), removed Flex Tools from the non-returnable list, and clarified the 3% cancellation fee applies when refunding to the original payment method. |
| 1.1 | 18 Aug 2026 | Added a New Zealand orders clause: for polishers/buffers and pressure washers, the customer pays return shipping to send the item back for repair, inspection, or a warranty claim, even where a fault is confirmed. |
| 1.2 | 18 Aug 2026 | Clarified that for domestic (Australian) faulty, damaged, or incorrect items, Detailing Shed covers or reimburses return shipping (not just the replacement/refund), with the New Zealand polisher/buffer and pressure washer exception carved out. |
We're here to help
If you need to contact us for advice on any of the products, please email us at info@detailingshed.com.au
Please include description of the product you are interested. Some info of you car, and also what you are trying to achieve.
We may also review our blogsfor product recommendations.