What it is and how we do it at Technomix

Visual inspection

Your contact at Technomix

Dominik Breuer

Senior executive

Visual inspection in a nutshell

  • Visual inspection – also known as visual control, visual testing or VT – is used to identify external errors, flaws and damage on parts and components that may compromise their quality, function or safety when they are used or further processed.
  • It is a type of non-destructive material testing (NDT) which forms part of the quality assurance arsenal in manufacturing companies.
  • The relevant standard distinguishes between direct and indirect visual inspection. Direct visual inspection uses analogue means, i.e. the human eye, if necessary with magnifying tools. Indirect inspection is conducted digitally, i.e. with the aid of camera technology.
  • Technomix offers all established visual inspection procedures and, with over 30 years’ experience in the field, boasts exceptional levels of precision. Even for the most complex of microparts.

Avoid complaints arising from external damage to your products.

Scratches, cracks, dirt deposits, undesired roughness, burrs, welded joint defects – visual inspection can rule out all of these, and more.

Generally, around 80% of conceivable production errors can be identified solely via visual inspection. That’s why, in most cases, it is the first and most cost-efficient step in non-destructive material testing.

It’s all about quality assurance: Manufacturing companies can’t afford any blunders when it comes to their orders. Any major complaints can cause significant economic and contractual problems for a company, not to mention the damage to their reputation, both on the market and among their clients.

Request your non-binding quotation today.

Trust in our company’s high quality standards and straightforward processes and find out how visual inspections and other material tests can make complaints and their associated contract risks a thing of the past.

Free, non-binding offers with quick response times.

Direct and indirect visual inspections

According to the general principles of DIN 13018, visual inspection can be subdivided into direct and indirect inspection procedures. The decisive difference is whether the inspection personnel check the product by eye – if necessary with the aid of a magnifying glass, microscope, endoscope, technoscope etc. – or via a monitor that displays the image from a camera, videoscope etc.

Alternatively, the visual inspection process can be described as analogue or digital. (The standard provides a much more scientific description involving the disruption, or non-disruption, of the optical path between the light source and the eye of the inspection personnel.)

For the customer, there is no notable difference between the two types of visual inspection, as they provide identical results, i.e. a product that is reliably identified as either flawed or approved. The type of procedure required has far more to do with the part to be inspected and the inspection requirements.

Visual inspection sometimes comes in for criticism – but not when we do it.

We often hear things like “Manual visual inspections are only carried out by people, and people can fail to spot defects.” Is there really a danger that errors can slip through unnoticed, as some statistics suggest? No. Well, not at Technomix anyway. While the criticism is valid, we can counter it in two ways:

  1. Firstly, we invest large amounts in the training and further education of our inspection personnel, we use cutting-edge inspection equipment, and ensure that our room conditions are ideal for exceptionally precise inspections.
  2. Secondly, we can also inspect most parts using fully automated camera technology that rules out errors and is cost-efficient. Find out more here: Innovation at Technomix.

Employment requirements for Technomix inspection personnel
→ Concentration and performance test
→ Trial work
→ 4-6 weeks of induction and qualification with allocated mentor
→ Approval process for every product to be inspected
→ Regular eye tests with optician
→ Regular validation tests

Still unsure about the benefits of visual inspection?

Technomix is regularly enlisted by companies, predominantly from the automobile and aerospace industries, that want to ensure that their customers receive only flawless products. Visual inspection is just part of our extensive range of services. Tell us what you require today and become one of the many satisfied customers who trust in the extraordinary levels of precision and reliable appraisals of our highly qualified inspection personnel.

Free, non-binding offers with quick response times.

Dominik Breuer

Senior executive