About us

Since our foundation our company has been dedicated to the photo-thermal measuring of coating thicknesses - a contact-free and non-destructive determination of the thickness of painted coatings, based on thermal waves.


A laser/LED beam creates a slight warming of the painted surface. The heat flows through the coated layer and is subject to a reflection at the base material. The thicker the coating, the longer the heat takes. An infra-red sensor determines the run-time and the thickness is calculated electronically.

Depending on the application, the entire measurement process is completed within a second, which means that even high production speeds up to 120 mtr./min. can be measured online.

The photothermal systems achieve a precision of accuracy up to ± 0.5 μm for coating thicknesses of 10-150 µm. It tolerates fluctuations in spacing distance of up to 100 mm.

Our customers are from automotive industry, adhesive coating industry, coil coating industry, and others.

Products and services

We have different measuring systems for different applications:

  • PS Industrial - Car body painting and coil coating

  • PS Standard - Adhesive coating, painting, ...

  • PS Light - coating of sealing profiles, plastic coating, ...

    The systems PS Standard and PS Light will be presented live here at the fair.
PS Light

The optical excitation of the PS Light is based on state-of-the-art LED technology. It is eye-safe and can therefore be operated without extensive protective measures. This allows a maximum throughput of your parts, which you can measure almost every second when you use the PS Light in a laboratory. Due to its sturdy construction, the long service life of its installed technology and the short measuring time, the PS Light is optimally suited for inline use.

PS Standard

PS Standard is a high-precision system designed for fast and non-destructive measurement of the thickness of adhesives, paint, and other coatings in the production sector.
PS Standard is well suited for the production field as it can be used to measure the thickness of coatings on all types of components.
With a deflection mirror, measurements of internal coatings are also possible for diameters ≥18 mm Maximum penetration depth: < 40 mm.

PS Industrial

PS Industrial is a robust solution for automated measurements of the thickness of coatings in paint lines. The PS Industrial robot is designed for measuring the thickness of coatings using a robot. It is mostly used to measure the thickness of coatings inline, particularly on car bodies.
The PS Industrial speed is designed for measuring the thickness of coatings on moving objects and is particularly used in coil coating lines.
They can be attached to robots or a traverse.

Phototherm Dr. Petry GmbH
Altenkesseler Str. 17/C1
66115 Saarbruecken

Phone: +49 681 9762300
Fax: +49 681 9762302
Internet: www.phototherm.de
E-mail: Send message

Contact person

Berndt Kautter
General Manager
Phone: +49 681 9762301
E-mail: Send message

News & Innovations

Measuring of the coating of sealing profiles during the production
Our newest system, the PS Light, did already a perfect job in measuring of the coating of sealing profiles during the production.

With our system you have the ability to check the coating directly after applying and so you can adjust and control the coating perfect. This reduce bad quality and avoid scrap ware. And all with a non-destructive, non-contact measuring system.

Different producers of sealing profiles are very happy to getting a solution for measuring very easy and simple their coatings.

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