Measuring and control instruments are very important resources in any production process. Along any process, there are many parameters and properties that need to be cared for with precision to guarantee high quality standards are met.

So, how to choose the best supplier for measuring and control instruments?

5 aspects to consider when selecting your measuring and control instruments supplier

There are different aspects you should consider when selecting your measuring and control instruments provider. The most important ones are the following:

1. Quality of the instruments

This may sound obvious, but the quality of the measuring and control instruments is of uttermost importance, since this will have a great impact on the result of your Quality Control (QC) and your Quality Assurance (QA) activities.

For example, S.A.M.A. Italia is a UNI EN ISO 9001 certified company, a certification that definitely confirms that you are choosing a supplier with clear procedures, aimed at providing an accurate service.

It is a supplier that operates all over the world through its own SAMA Tools brand.

I believe it is reliable and experienced, from which you can make sure you get hight quality tools.

Moreover, all their instruments are manufactured to comply with the relevant standards.

2. Calibration

As defined by the experts at SAMA Tools, “calibration means to identify metrological characteristics of a measuring instrument and it may be defined as a “photograph” of the instrument in its current state. It is the result of a comparison with a reference sample and it does not contemplate the adjustment of the instrument.”

This is an important aspect because it can happen that you get a “quality” instrument but which is not calibrated, so it may need adjustment. The result is an instrument that does not work properly and it will only create problems.

To prevent this from happening, SAMA Tools offers calibration services and supplies Laboratory Test Reports in compliance with UNI CEI EN ISO/IEC 17025 and ACCREDIA certificates on all their instruments, but also on equipment you already own and of other brands.

How often should the measuring instruments be calibrated? We talked about this here.

3. Destructive or non-destructive testing instruments?

When we speak about measuring and control instruments, we can speak about two categories: destructive testing instruments and non-destructive testing instruments.

As the name implies, destructive testing requires altering or destroying the sample in order to identify mechanical characteristics.

If you want to carry out measurements and controls in your production process without damaging your sample, the best alternative is non-destructive testing, such as:

  • Visual tests
  • Flaw inspection
  • Roughness measure and control
  • Ultrasonic thickness control
  • Coating thickness control
  • Hardness testing
  • Environmental control

This will allow you to identify properties and mechanical features directly on the final product without damaging it. And SAMA Tools offers you the best instruments for each of these tests.

4. Technical support

When we see the words “technical support”, most of us immediately think  about fixing or repair. However, the technical support you should look for when selecting your measuring and control instruments provider must be a more holistic kind of service.

As SAMA Tools Export Manager Martina Guatteri, expresses it: “It is well known that every successful company has an excellent after-sales assistance.” Yes, this should be part of what you should look for, but as she also says, pre-sales assistance is also very important.

The goal is to find a supplier that can really understand your needs and provide you with the best solution, instead of having to be adjusting until you get “something close to what you wanted”.

Moreover, having a good technical support means making sure you won’t have any problems while using the instruments, and that you won’t need a long time to learn how the instrument is used.

SAMA Tools offers all their customers a holistic metrological consultancy service and they take care of your needs from the very beginning. They help you become an independent user of their instruments, with expert technicians that will assist you during installation, if required, and during the first measurements. And you will gain notions that go far beyond reading a manual.

5. Do you need portable instruments?

It is not always possible to install an instrument in a laboratory or within the process to measure and control important parameters. Most of the time, when dealing with QC and QA, you need to measure “on the fly” and this means having a portable and light tool, suitable for measuring in the field.

SAMA Tools can provide you with a wide range of portable tools while maintaining the highest quality on the market.

  • Portable surface roughness testers
Portable surface roughness testers

In photo: SAMA Tools portable surface roughness testers

  • Ultrasonic thickness gauges
Precision ultrasonic thickness gauge

In photo: SAMA Tools precision ultrasonic thickness gauge

  • Ultrasonic flaw detectors
Ultrasonic flaw detectors

In photo: user with ultrasonic flaw detectors

  • Portable external load cell torque testers
Portable external load cell torque testers

In photo: SAMA Tools portable external load cell torque testers

  • Micrometers and calipers
Micrometers and calipers

In photo: SAMA Tools micrometers and calipers

  • Sound level meters

In photo: SAMA Tools sound level meters

  • Luxmeters

In photo: SAMA Tools Luxmeter

  • Moisture meters
Moisture meters

In photo: SAMA Tools moisture meters

  • Infrared thermometers

In photo: SAMA Tools infrared thermometers

  • Portable pH meters
Portable pH meters

In photo: SAMA Tools portable pH meters

  • And many more…
SAMA Tools measuring instruments

In photo: SAMA Tools measuring instruments

What if I am an international customer?

Being a worldwide leader in measuring control and instruments, as it was mentioned above, SAMA Tools exports its products all over the world.

You can count on the Export Manager, Martina Guatteri, specialized in customs procedures, who will be able to provide you with the necessary help in any customs procedures required, and on Beatrice Roni, who is equally available to help you in the purchase phase and obtain the best instruments for your application.

You can contact them!


Feedback from the world

Below you can find some feedback that we recently received from three clients based outside Italy.

The first one is a video review that sent us Emre Sari of Sarilar Dis Tic Ltd Sti, a company based in Turkey that provides highest quality hazelnuts.

To ensure the high quality of their hazelnuts, they constantly monitor the humidity level, using our Moistures meters – SA7825G.

In addition, Sarilar has assumed the role of supplier of SAMA Tools brand, providing these moistures meters to its customers on the Turkish territory, for a better quality control of their final products.

Listen to the video review, or read the transcription below, and if you want to know more, read:

“Quality Control in the Hazelnut Production: The case of Sarilar”


The second feedback comes from Spain, from a company certified for the production of Flow meters.

“Very good service and counseling during the purchase. The instrument working as expected without any problems.”

Marcel Caballero – Guadarrama-Flow, S.L.


The third one comes from Romania, from a company in the metal packaging sector. It provides solutions to some of the world’s most recognizable brands.

“For several years we were looking for an equipment to improve our quality incoming goods system. We faced issues with the curing of the lacquer on our raw material sheets for which was difficult to prove the cause of the nonconformity. By using SAAB521 Solvent Rub Resistance Tester we succeeded to have the expected results, to put in place a procedure and more than that extended it to our suppliers in order to have the same measurement system. I highly recommend it.”

Andrea Nedelcu

Why I recommend SAMA Tools as your measuring and control instruments supplier?

So far, I have showed you that SAMA Tools ticks all the boxes to be considered a first-class measuring and control instruments provided.

What’s more, from my experience having direct contact with them, the attitude and clarity in their communication makes you feel sure you are in the right hands.

In addition, you can subscribe for free to their English newsletter and get a nice freebie in the process. You’ll be getting valuable information in the form of an ebook.

If, on the other hand, you are from Italy, subscribe to the Italian newsletter edited by the marketing manager Fabiana Fanti.

This combination of high-quality products and services makes it a no brainer for anyone looking for a measuring and control instruments provider.

Go get in touch with S.A.M.A. Tools, you won’t regret it!


Carlos Collantes

Mechanical Engineer


Video summary “Measuring instruments: 5 tips for a quality choice”


Roughness measure and control is a very important aspect to guarantee surface quality. It may seem to be a smooth flat surface, but it’s never 100% flat. This means surface roughness is never a value of zero. But, what is surface roughness?

What is surface roughness?

Surface roughness refers to the irregularities that appear on the surface of a piece as a result of mechanical processes such as milling, turning and grinding.
So, even the smoothest surface to the touch or flattest surface to the eye will have peaks and valleys that must be measured and controlled to make sure the desired surface finish is achieved.

Why is roughness measure and control so important?

Measuring and controlling the roughness of the surface is important because it can have a significant impact on different aspects of the piece, including:

  • The look and feel of the surface.
  • The functionality of the surface.
  • The adherence of any kind of coating on the surface.

Rotating machinery represent a good example to illustrate this importance. There are moving parts that require specific roughness for their proper operation.

If the roughness is too high, it may result in accelerated failure because of increased wear, while a roughness value below the requirements may result in loose parts that could affect machine operation.

How to measure surface roughness?

Surface roughness is usually measured by means of a probe that is commonly called a surface roughness profiler. This name is given to the probe because it moves in a straight line over an evaluation length selected on the surface and creates a profile of the irregularities found on such surface.

The profile created is composed of peaks and valleys, and the roughness parameters are calculated based on the height of those peaks and the depth of those valleys.

Probe roughness tester SA6230

The parameters of roughness

One of the most common ways to represent surface roughness is with the average roughness or “Ra”. The average roughness (Ra) is defined as the arithmetic average value of the absolute values within an evaluation length.

In other words, the value of Ra shows an average value of how much the profile moves up or down from an imaginary line that represents what is considered completely flat. This information means that larger values of Ra represent a higher roughness of the surface.

Here is some more information about roughness parameters.

However, measuring and controlling the average roughness (Ra) of the surface alone may not always be enough, as it has some limitations. For example, an Ra value does not make a difference for the type of irregularity. This makes it necessary to measure and control other roughness parameters, such as:

  • RPc to characterize a profile, which means counting the peaks.
  • The mean square roughness (Rq), which is the square root of the mean of deviations squares of the real profile within an evaluation length.
  • Rz, commonly used in sandblasting and which takes into account the average peak-valley difference of 10 points (5 peaks and 5 valleys) that deviate more within an evaluation length.
  • Rmax, which allows measuring the maximum depth of profile within an evaluation length.

Fortunately, all these values are not calculated by hand any more. Tools like our graphic roughness tester will do the job with high accuracy and without complications.

Roughness tester SA6260


Take a look at the video of graphic roughness tester


What are the applications of roughness measure and control?

As described above, surface roughness can have an impact on different aspects of a piece. Therefore, it is common to see roughness measure and control applications which need to reduce such an impact.
Some examples of surface roughness measure and control include:

Roughness tester SA6230

  • Automotive parts where controlling the friction is important, like in the case of brake and clutch systems.
  • Equipment for pharmaceutical and food processing, since they require low values of roughness to avoid particles to adhere on the surfaces of vessels and other elements to avoid contamination between batches.
  • Flooring preparation to avoid slippery surfaces in places like hospitals and other areas where a higher roughness on the floor surface is required.
  • Electronics and semiconductors for a better operation.
  • Machine tools production, especially those used for high-precision manufacturing such as gear cutting tools.
  • Hydraulic and pneumatic actuators, where avoiding the increase of friction is essential for proper operation.
  • Paper manufacturing industry.
  • Medical equipment.
  • Telescopic tubes.
  • Clothing manufacturing machinery.
  • Ceramics and porcelains.
  • Bearings, couplings and seals.
  • Casting molds and other casting equipment that require high precision surfaces.
  • Valves, pumps and other machinery.

One can easily see that many different industries can benefit from roughness measurement and control.

Moreover, it’s important to highlight that measuring and controlling surface roughness is an important step both in production and in quality assurance (QA) and quality control (QC) in the laboratory.

Sometimes, pieces need to be processed in-line or on the field, and therefore measurements are needed outside the laboratory.

For those cases, our compact surface roughness tester and portable surface roughness tester definitely come in handy.

Roughness Tester SA6240

How to select a surface roughness measure and control tool?

Acquiring a surface roughness measure and control tool is very important, and it is also important to select the best option for the application at hand. There are different aspects that require consideration when selecting the right tool. The most relevant are:

  • Whether the specific values of the parameters are required or just a comparison is needed.
  • The number of parameters that need to be measured.
  • The need for a visualization of the profile.
  • The need for portability.
  • The need for a specific application such as coating after sandblasting.

Roughness meter calibration

The calibration report with reference to primary samples is carried out by using LAT certified specimens whose roughness values Ra, Rz etc are tested with the new roughness meters, or already in customer’s possession, to identify the relative deviation.

You can rely on us for the calibration of your instruments because we are ISO 9001 certified for the provision of the calibration service.

Calibration banner

If you want to check the roughness measure and control instruments, we offer to selection to choose from,  just click here.
However, if you are not sure or have any doubts about measuring and controlling surface roughness, we reccomend you contact us and one of our technical experts will gladly help you.