Physical Properties Testing (PPT) is a multi-national holding company that designs and manufacturers physical property testing instrumentation focused on a wide range of end markets and applications. Each brand within PPT represents a category leader in their specific testing niche.

Established in 1872, James Heal has been serving the textile industry for more than 140 years. Specializing in the design and manufacturing of textile testing laboratory instruments, the company supplies testing equipment to textile and garment manufacturers and testing laboratories worldwide. Headquartered in Halifax, United Kingdom, the company has over 100 FTEs in addition to their network agents and distributors in over 50 countries. James Heal was acquired by PPT in September 2014.


Established in 1977, Mecmesin is a British company specialising in the design and manufacture of force and torque measurement equipment for quality control. Based in Slinfold near Horsham, West Sussex the company has expanded globally with subsidiary companies in France, Germany, Thailand, China and the USA plus a global network of exclusive distributors who offer customers local technical expertise and after-sales support.

The Mecmesin brand represents excellence in accuracy, build, service and value. Mecmesin’s test systems enable designers, engineers and quality managers to feel confident in the quality of their raw materials, components or finished products, to maintain consistency of manufacture, to comply with relevant standards and save money by minimising rejects in the production process.


Battery Ventures are a global, technology-focused investment firm pursuing the most promising companies and ideas. Founded in 1983, the firm makes venture-capital and private equity investments from offices in Boston, Silicon Valley and Israel. They work hard, but humbly, and are guided by data-driven processes. They seek out extraordinary businesses and leaders who operate the same way.



Thomas Reslewic, PPT Executive Chairman

Thomas Reslewic – Chairman

Thomas has over 20 years’ experience of managing companies who manufacture scientific instrumentation and test products.

Before PPT, Thomas served as group president for two business groups within Teledyne Technologies (TDY:NYSE): Teledyne Environmental and Electronic Instruments and Teledyne Defense Electronics.

There he managed a portfolio of companies that produce a broad range of scientific instruments, environmental monitoring equipment, test and measurement instruments, microwave-communication solutions and defense electronics.

Thomas holds a degree in Physics from College of the Holy Cross (Massachusetts) and an MBA from the University of Oregon.

John Page – Managing Director of PPT Group

John has over 30 years’ experience in mechanical engineering, and since joining Mecmesin Ltd in 1988 has held a number of key senior management roles within the company including Applications Engineering Manager, UK Sales Director, and Business Development Director.

John was appointed Managing Director of Mecmesin Ltd in 2005, and since that time the company has consistently delivered strong year on year organic growth. He was promoted to Managing Director of the PPT Group in March 2020.