Exhibit 21 METRIKA SYSTEMS CORPORATION Subsidiaries of the Registrant As of February 23, 2000, Metrika Systems Corporation owned the following companies: NAME STATE OR JURISDICTION PERCENT OF OF INCORPORATION OWNERSHIP - ---------------------------------------------------------------------------------------------------------- Gamma-Metrics Minerals Pty Ltd. South Australia 100 Radiometrie RM GmbH Germany 100 Radiometrie S.A. France 100 Gamma-Metrics California 100 MF Physics Corporation Delaware 100 Radiometrie Corporation Delaware 100 DMC Mess & Regeltechnik GmbH Germany 100 Radiometrie U.S.A., Inc. California 100 Radiometrie Limited England 100