Calibration solutions to improve your performance. Originally the metrology branch of Air Liquide, starting in 1999, Trescal has become the world leader in precision service. Your productivity depends on how reliable your tools are. As the global leader in calibration services, Trescal has experience in every industry, instrument and domain so that you can feel confident in entrusting us with your entire asset portfolio. We calibrate 3.3 million instruments per year, 98% of which is in-house, covering 20,000 brands and 150,000 referenced instruments. We provide a full suite of precision services that includes repair, maintenance, asset management, validation and qualification.