Zenith is an Australian company offering complete instrumentation solutions including Sales, Service, Repair, Calibration and Installation. Contact for details Zenith Sales & Calibrations Pty Ltd, Unit 22, 9 Salisbury Rd, Castle Hill, NSW 2154, Ph: 02 9680 8765, Fax: 02 9680 8847, Web: www.zenithinstruments.com.au