How to Measure Car Paint Thickness with UNI-T UT343A Malaysia
How to Measure Car Paint Thickness with UNI-T UT343A Malaysia
Content
When inspecting a used vehicle, the paint may look uniform to the eye even when certain panels have been repainted.
A paint thickness gauge provides another useful data point by measuring the coating thickness over metal body panels.
The UNI-T UT343A Coating Thickness Gauge supports both Fe and NFe metal substrates and offers a measuring range of 0–1750 μm, making it suitable for automotive paint inspection and general coating measurement in Malaysia.
What Does a Paint Thickness Gauge Tell You?
A paint thickness gauge measures the distance between the probe and the underlying metal substrate.
On a vehicle, this normally represents the combined thickness of surface coating layers above the metal.
The objective is not simply to find the highest number.
What matters is the pattern of readings across different locations.
For example:
Bonnet: 118 μm
Front door: 121 μm
Rear door: 119 μm
Rear quarter panel: 205 μm
The higher reading on one panel does not automatically prove accident damage, but it provides a reason to inspect that area more carefully.
Step 1: Check the Surface
Before measurement, make sure the measurement point is:
Clean
Dry
Free from dirt
Free from excessive dust
Suitable for probe contact
Contamination between the probe and surface can affect the reading.
Step 2: Take a Reference Reading
Instead of deciding that a particular number is automatically "normal", first take readings from several comparable panels.
For example, measure:
Bonnet
Roof
Front doors
Rear doors
Front fenders
Rear quarter panels
Boot lid
This creates a useful reference pattern for that particular vehicle.
Step 3: Take Multiple Measurements
Do not measure only once in the centre of each panel.
Take readings at several points.
For example, on a door:
Upper section: 115 μm
Centre: 118 μm
Lower section: 117 μm
Consistent readings provide a different inspection picture from:
Upper section: 116 μm
Centre: 245 μm
Lower section: 310 μm
Large differences should lead to further inspection rather than an immediate conclusion.
Step 4: Compare Left and Right Sides
Comparing similar areas can be useful.
For example:
Left front door: 110–125 μm
Right front door: 108–122 μm
The results are relatively similar.
If another panel repeatedly measures significantly higher or lower, investigate why.
Possible reasons can include:
Repainting
Additional coating layers
Previous body repair
Different panel material
Panel replacement
Different original coating process
Why Fe and NFe Detection Matters
Vehicle construction can involve different metals.
Fe generally refers to ferrous substrates such as steel.
NFe refers to non-ferrous substrates such as aluminium.
Because the UNI-T UT343A supports Fe and NFe measurement, it offers greater flexibility when checking vehicles containing different metallic body components.
However, coating thickness gauges designed for metal substrates generally cannot provide meaningful conventional Fe/NFe coating readings on plastic body parts.
Don't Judge a Car from One Reading
This is one of the most important points when using a paint thickness meter.
A reading of 200 μm does not automatically mean:
"Accident car."
Likewise, a reading of 100 μm does not guarantee that a vehicle has never been repaired.
Paint systems, manufacturers, models, panel materials and previous work can all affect the results.
The correct approach is:
Measure → Compare → Identify unusual patterns → Inspect further
Paint thickness measurement should be combined with visual inspection and other vehicle-condition checks.
Why UNI-T UT343A Is Useful for Automotive Inspection
The UT343A offers several practical functions for this application:
0–1750 μm measurement range
Fe/NFe substrate detection
Single measurement mode
Continuous measurement mode
MAX/MIN/AVG functions
199 data storage
μm/mil unit selection
Upper and lower limit settings
It can be used by:
Used-car dealers | Workshops | Vehicle inspectors | Body & paint shops | Car buyers | Automotive service businesses
Paint Thickness Gauge Malaysia
A coating thickness gauge is a useful inspection tool when you need objective measurement data instead of relying only on visual appearance.
The UNI-T UT343A can also be used beyond automotive applications, including:
Metal fabrication
Powder coating
Painted steel inspection
Aluminium coating inspection
Manufacturing QA/QC
Industrial maintenance
For users in Kuala Lumpur, Selangor, Johor, Penang, Melaka, Negeri Sembilan, Perak, Pahang, Kedah, Kelantan, Terengganu, Perlis, Sabah and Sarawak, MTM Precision supplies industrial measuring and testing instruments for different applications.
Looking for UNI-T UT343A in Malaysia?
Contact MTM Precision Sdn Bhd for UNI-T UT343A product enquiries and application assistance.
MTM Precision Sdn Bhd
Showroom & Service Centre: Puchong, Selangor, Malaysia
Tel: 03-8080 7172
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com
Website: www.mtmpre.com.my
Tell us whether you are measuring automotive paint, powder coating, painted steel or coated aluminium, and we can help you select a suitable coating thickness gauge.
22 Sep 2026
