SDI operates through a number of brands:

Fistreem International was acquired 24th September 2018

Fistreem International

Fistreem International designs and manufactures water purification products and vacuum ovens.

Atik Cameras

Atik Cameras designs and manufactures highly sensitive cameras. These are marketed for life science and industrial applications under its Artemis brand and for deep-sky astronomy imaging as Atik cameras.

Quantum Scientific Imaging

Quantum Scientific Imaging – design and manufacture scientific cameras for applications that require superior imaging performance such as astronomical, life science, research and industrial imaging.

Synoptics Health

Synoptics Health focuses on imaging techniques within the clinical environment.


Synbiosis produces equipment for microbiologists to automate microbial colony counting.


Syngene produces equipment for life scientists to image and analyse electrophoresis gels used for DNA and protein analysis.

Applied Thermal Control

Applied Thermal Control designs and manufactures precision re-circulation chillers, coolers and heat exchangers used to control the thermal environment within a wide variety of applications including within the scientific instrument support market (including electron microscopes, X-ray, diffraction and mass spectrometers.

Astles Control Systems

Astles is a supplier of chemical dosing and control systems to different manufacturing industries including manufacturers of beverage cans, engineering and motor components, white goods, architectural aluminium and steel.


Sentek manufactures and markets off-the shelf and custom-made electrochemical sensors for water based applications. These sensors are used in laboratory analysis, in food, beverage and personal care manufacture, as well as the leisure industry.

Opus Instruments

Opus Instruments is the manufacturer of the Osiris infrared imaging system designed specifically for art conservators to provide high-resolution, high-speed images in a small portable camera.