SDI Group

Collins Walker Ltd., established in the United Kingdom, is a manufacturing company specializing in the production of electric steam and hot water boilers. It serves both the industrial and commercial sectors, both domestically and internationally. Their product range includes electrode steam and hot water boilers, immersion element steam and hot water boilers, along with ancillary equipment such as blowdown vessels, hotwells, dosing systems, water treatment systems, and superheaters.

InspecVision specializes in designing and manufacturing precision inspection machines for industrial applications. Their product portfolio includes industrial metrology machines, optical 2D scanners, 3D inspection and reverse engineering machines, and precision metrology equipment. These solutions enable clients to enhance their quality control processes, boost production capacity, and improve overall operational efficiency.

LTE Scientific is a manufacturer, supplier and service provider of medical and laboratory equipment, serving the healthcare, research, pharmaceutical, biotech, food and chemical industries. Its product range includes laboratory and medical autoclaves, endoscope drying and storage cabinets, and a broad line of laboratory thermal equipment such as ovens, incubators, freeze-dryers and environmental chambers used for stability testing, shelf-life studies and large-scale incubation.

Chell Instruments Limited, established in 1992 and located in North Walsham, United Kingdom, specializes in the development and manufacturing of pressure, vacuum, and gas flow measurement and control solutions. The company provides a comprehensive range of instrumentation, including pressure and gas flow measurement devices, vacuum measurement systems, mass flow meters, and controllers. Chell Instruments caters primarily to industries such as steam turbine testing and power generation, offering services that encompass the design, manufacture, calibration, and custom production of measurement instruments and systems. As a subsidiary of SDI Group plc, Chell Instruments continues to deliver high-quality solutions for gas handling and purification needs.

MPB Industries Ltd is a manufacturer based in East Peckham, United Kingdom, specializing in the design and production of flow measurement instruments. Established in 1986, the company offers a diverse range of products, including variable area flowmeters, flow alarms, flow transmitters, flow indicators, flow switches, calibration cylinders, sight glasses, and specialized medical gas flowmeters. MPB Industries serves various sectors, such as power generation, oil and gas production, medical anesthesia, aviation, pharmaceuticals, and education, providing essential tools for the accurate measurement and control of liquids and gases. As of April 2019, MPB Industries operates as a subsidiary of Scientific Digital Imaging plc.

Graticules Optics is a proven world-class designer and manufacturer of precision micropattern products.

Thermal Exchange Ltd is a manufacturer and distributor of cooling and temperature control equipment located in Leicester, United Kingdom. Established in 1982, the company specializes in producing a wide range of products including industrial chillers, air blast coolers, laboratory chillers, and welding coolers, as well as water additives tailored for industrial, medical, and scientific markets. Operating as a subsidiary of Scientific Digital Imaging plc since February 2019, Thermal Exchange is committed to delivering innovative solutions that meet the specific temperature management needs of its diverse clientele.

Quantum Scientific Imaging specializes in the design and manufacture of high-performance scientific cameras tailored for a variety of demanding applications, including astronomical, life science, research, and industrial imaging. The company emphasizes the development of advanced imaging technologies and accessories, utilizing sophisticated electronic design and testing software to enhance imaging capabilities. In addition to its core products, Quantum Scientific Imaging offers extensive technical support, maintenance, and warranty services to ensure optimal performance and customer satisfaction. This commitment to innovation and client support positions the company as a leader in the field of quantum scientific imaging.

Founded in 1995, Applied Thermal Control designs, manufactures, and supplies precision recirculating chillers, coolers, and heat exchangers for scientific instruments and process control markets. Based in Whitwick, UK, the company employs around 15 staff and collaborates with international distributors and service agents.

Astles Control Systems Limited, founded in 1989 and based in Princes Risborough, United Kingdom, specializes in the design, manufacture, and supply of chemical dosing and control systems. The company offers a wide range of products, including online industrial control systems, dosing pumps, and laboratory sensing equipment, such as pH and conductivity meters. Its offerings cater primarily to niche markets, notably the two-piece beverage can manufacturing sector, as well as industries like automotive, engineering, and white goods. In addition to product supply, Astles provides essential services such as routine maintenance, emergency callouts, and calibration, which contribute to a steady revenue stream from repeat business.

Sentek Limited is a manufacturer of electrochemical sensors, specializing in pH and conductivity sensors for water-based applications. Founded in 1991 and headquartered in Braintree, United Kingdom, the company produces a range of products including laboratory and industrial pH sensors, 2 and 4 pole conductivity sensors, ion selective electrodes, and dissolved oxygen electrodes. Additionally, Sentek offers various accessories such as cables, connectors, and consumables. The company caters to diverse market sectors, including research and production facilities, hydroponics, freshwater management, water treatment, agriculture, health, and the food industry. In response to growing consumer demand, Sentek expanded its operations with a new plant in Fife.

Atik Cameras designs and manufactures highly sensitive cameras. These are marketed for life science, industrial applications and for deep-sky astronomy imaging.

Opus Instruments specializes in the manufacture of the Osiris infrared imaging system, designed specifically for art conservators. This innovative portable camera delivers high-resolution, high-speed images, enabling the examination of underdrawings in artworks. It has been utilized in major art galleries worldwide, including the Louvre, where masterpieces by renowned artists such as Leonardo da Vinci and Rembrandt have been analyzed. The Osiris system is powered by an ARM microcontroller that manages the scanning process, controls the infrared sensor, and transmits the captured data to a PC via USB. As a result, art conservators can view the imaging data in real-time as the scanning takes place. Opus Instruments is exploring additional applications for this technology to enhance its offerings and expand its impact in the field of art conservation.

Artemis CCD manufactures CCD cameras for astronomy and scientific imaging.

Synoptics Ltd is a UK-based company specialising in digital imaging technology for life science research. It designs and manufactures gel imaging and analysis systems, including transilluminators, reagents, and software for applications such as proteomics, TLC, and zone measurement. Key software products include Dymension for 2D gel image analysis, GeneTools for automatic image analysis, GeneDirectory for data storage and extended band matching, and GeneSys for image acquisition. The company's products aim to accelerate life science research by providing advanced, efficient imaging solutions.