T J Williams was formed over 150 years ago to supply nautical instruments and charts to the thriving shipping industry in South Wales. T J Williams Instrumentation also offers a comprehensive Calibration and Repair service on all types Pressure - Temperature - Level - Flow instrumentation. We also recognise that our customers not only require quality products, but look to T J Williams too provide a design and development service that is maintained by working with ISO 9001:2000 accreditation. T.J.Williams Instrumentation has evolved into the chemical and process industries markets through both its management and employees expertise. Today T J Williams Instrumentation is a manufacturer of Pressure/Vacuum gauges, Test Gauges, Tank Contents Gauges, Low pressure Capsule Gauges and Chemical seals