Coating Thickness Gauge vs Ultrasonic Thickness Gauge Malaysia – Which One Do You Need?
Coating Thickness Gauge vs Ultrasonic Thickness Gauge Malaysia – Which One Do You Need?
Do you need a coating thickness gauge or an ultrasonic thickness gauge?
Both instruments measure “thickness”, but they are designed to answer very different questions.
For industrial users in Malaysia, choosing the wrong type of thickness gauge can result in purchasing an instrument that does not measure what you actually need.
A simple way to understand the difference is:
Benetech GT-1201 coating thickness gauge → measures suitable coatings over compatible substrates.
Ultrasonic thickness gauge → commonly used to measure the thickness of the material itself in suitable applications.
The first question should therefore be:
What exactly are you trying to measure?
Example 1: Paint Thickness on a Steel Tank
Suppose you have a painted steel tank.
Your question is:
“How thick is the paint or coating?”
This is a coating thickness measurement application.
A suitable coating thickness gauge such as the Benetech GT-1201 may be considered depending on the coating and substrate.
You are interested in the layer above the steel.
Example 2: Remaining Steel Wall Thickness
Now consider the same tank.
This time your question is:
“The tank has been in service for many years. How much steel thickness remains?”
This is a completely different measurement requirement.
You are no longer trying to measure the paint.
You want to evaluate the steel wall itself.
An appropriate ultrasonic thickness gauge may be required for this type of application.
The Difference in One Example
Imagine a steel plate with paint on top.
The structure is:
Paint
↓
Steel plate
A coating thickness gauge asks:
“How thick is the paint?”
An ultrasonic thickness gauge application may ask:
“How thick is the steel plate?”
These are not interchangeable questions.
When Should You Use Benetech GT-1201?
The Benetech GT-1201 coating thickness gauge may be considered when you need to check suitable coatings such as paint or powder coating over compatible metal substrates.
Typical applications include:
Automotive paint inspection
Powder coating QC
Painted steel inspection
Painted aluminium inspection
Metal fabrication
Electrical enclosure QC
Machinery finishing inspection
Incoming coated-part inspection
The objective is to evaluate the coating, not the overall metal thickness.
When Do You Need an Ultrasonic Thickness Gauge?
An ultrasonic thickness gauge is commonly considered when the requirement is to measure the material thickness itself.
Typical applications may include:
Steel tanks
Pipelines
Pressure vessels
Steel plates
Ship structures
Storage tanks
Industrial equipment
Corrosion monitoring
For example, maintenance personnel may want to determine whether a steel wall has become thinner because of corrosion or erosion.
That is not the same job as measuring paint thickness.
Automotive Example
Suppose you are inspecting a used car.
You want to compare the paint thickness across the doors, bonnet and fenders.
This is a coating thickness application.
A coating thickness gauge may help identify unusual paint thickness patterns on suitable metal panels.
An ultrasonic thickness gauge would not normally be the first instrument selected for this objective.
The question is about paint, not the structural thickness of the vehicle panel.
Powder Coating Example
A factory manufactures powder-coated electrical cabinets.
QC needs to check whether the powder coating meets the required thickness.
Again, this is a coating thickness measurement application.
The team may use a suitable coating thickness gauge to compare several locations on each cabinet.
For example:
Top
Centre
Bottom
Left
Right
The underlying steel sheet thickness is not the main measurement objective.
Pipeline Example
Now imagine a maintenance team inspecting an old industrial pipeline.
The outside surface is painted.
The maintenance question is:
“Has corrosion reduced the pipe wall thickness?”
This is not simply a coating thickness problem.
The team is interested in the remaining pipe wall.
An appropriate ultrasonic thickness measurement solution may be required.
Can GT-1201 Measure Steel Plate Thickness?
If by “steel plate thickness” you mean:
2 mm
5 mm
10 mm
20 mm
of actual steel material, the GT-1201 is not being selected for the correct type of measurement.
The GT-1201 is a coating thickness gauge.
Do not confuse the thickness of the coating with the thickness of the steel underneath it.
Can an Ultrasonic Thickness Gauge Measure Paint?
That is also not the right way to choose an instrument.
Different ultrasonic instruments and measurement modes are designed for particular applications.
If your actual requirement is simply to measure a relatively thin coating over a compatible metal substrate, start by looking at the appropriate coating thickness measurement technology.
Do not buy an ultrasonic gauge merely because it also has the word “thickness” in its description.
Corrosion vs Coating Inspection
This distinction is especially important in industrial maintenance.
Coating Inspection
Question:
Is the protective coating at the required thickness?
Possible instrument category:
Coating thickness gauge
Corrosion Inspection
Question:
How much base metal remains after corrosion?
Possible instrument category:
Ultrasonic thickness gauge
A maintenance department may actually need both types of instruments because they answer different questions.
Example: Storage Tank Maintenance
Consider a painted steel storage tank.
The maintenance team may have two separate inspection requirements.
Requirement A
Check the thickness of the protective coating.
This concerns the surface coating.
Requirement B
Check the remaining steel wall thickness at selected locations.
This concerns the tank material itself.
One instrument should not automatically be expected to perform both jobs.
Example: Marine and Ship Inspection
Marine structures can also involve both measurement requirements.
A painted steel structure may require inspection of:
Protective coating condition
and
Remaining steel thickness
These are related to the same asset but are still different measurements.
The correct instrument depends on which layer you need to evaluate.
Example: Fabrication Factory
A metal fabrication company receives steel plate and manufactures painted machinery components.
During fabrication, the company may need to confirm the steel plate dimension or thickness.
After painting, QC may also need to check the coating thickness.
Again, these are separate measurements.
Do not assume one handheld thickness gauge automatically covers both.
Why Customers Often Buy the Wrong Type
A common enquiry is:
“I need a thickness meter.”
But this is not enough information.
The supplier needs to know:
Thickness of what?
Paint?
Powder coating?
Steel?
Aluminium?
Pipe wall?
Tank wall?
Plastic?
Once the actual material and measurement objective are known, instrument selection becomes much easier.
Five Questions to Ask Before Buying
Before purchasing any thickness gauge, answer these five questions.
1. What are you measuring?
Coating or base material?
2. What is the material?
Steel, aluminium, plastic or another material?
3. What thickness do you expect?
Microns?
Millimetres?
4. What is the component?
Car panel, cabinet, pipe, tank, plate or machinery?
5. Why are you measuring it?
Quality control, corrosion inspection, maintenance, automotive inspection or production?
These answers usually identify the correct instrument category quickly.
Micron vs Millimetre Is Another Clue
Coating thickness is often discussed in micrometres or microns (µm) depending on the application.
Base material thickness is often discussed in millimetres (mm).
This is not an absolute selection rule, but it can help identify what the customer is trying to measure.
For example:
“I want to check the paint thickness.”
likely points toward coating inspection.
While:
“I need to know whether this 8 mm pipe wall has reduced to 6 mm.”
clearly describes a different type of thickness measurement.
Which Instrument Should a Factory Buy?
Some factories may benefit from both.
For example, a company involved in fabrication and maintenance could use:
Coating thickness gauge
for paint and powder coating QC.
And:
Ultrasonic thickness gauge
for suitable material thickness and corrosion-related inspection.
The instruments complement each other rather than directly replacing each other.
GT-1201 Is for Coating Thickness Applications
The Benetech GT-1201 should be considered when the measurement objective is the coating over a suitable metal substrate.
Potential users include:
Powder coating companies
Automotive inspectors
Metal fabricators
Factory QC teams
Electrical panel manufacturers
Machinery manufacturers
Incoming inspection teams
If the objective is remaining pipe or tank wall thickness, tell us that clearly so the correct instrument category can be considered.
Not Sure Which Thickness Gauge You Need?
Instead of asking only:
“Do you have a thickness meter?”
send us a photo of the actual component.
Tell us:
What material is it?
Which layer do you want to measure?
What approximate thickness do you expect?
What is the application?
For many industrial enquiries, a photo immediately makes the requirement much clearer.
Coating Thickness Gauge vs Ultrasonic Thickness Gauge Malaysia
The easiest way to remember the difference is:
Want to measure the coating? → Consider a coating thickness gauge.
Want to measure the material itself or remaining wall thickness? → Consider an appropriate material thickness measurement solution such as an ultrasonic thickness gauge.
The Benetech GT-1201 belongs to the first category.
It is intended for suitable coating thickness inspection, including applications involving automotive paint, powder coating, metal fabrication and industrial QC.
Choosing the correct instrument starts with identifying which layer you actually need to measure.
Thickness Gauge Supplier Malaysia
MTM Precision Sdn Bhd
Showroom & Service Centre:
No 29-1 & 2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia
Tel: 03-8080 7172
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com
Website: www.mtmpre.com.my
We support customers throughout Selangor, Kuala Lumpur, Johor, Penang, Melaka, Negeri Sembilan, Perak, Pahang, Kelantan, Terengganu, Kedah, Perlis, Sabah and Sarawak.
Not sure whether you need a Benetech GT-1201 coating thickness gauge or an ultrasonic thickness gauge?
Send a photo of your component to WhatsApp +6016-660 7346 and tell us exactly which layer you want to measure. We can help identify the more suitable instrument category before you buy.
04 Oct 2026
