4TEK JSC has a wealth of experience in accredited pressure, electrical, temperature calibration and associated instrumentation. We devote to provide the most suitable and high quality instruments to industrial and academic fields. We keep developing provide the most advanced instrument to meet customer’s requirement.

We are the distributor of Additel USA - Provider of high quality handheld / portable temperature and pressure calibrators for industry and laboratory. Additel is not only the manufacturer, but also the pioneer for the design and research and development.

Main product :  Automated Pressure Calibrator, Digital Pressure Calibrator, Pressure Test/Calibration Pumps, Multifunction Process Calibrators, Temperature Calibrator.