73677309
Aug 10, 1987
Apr 5, 1988
SYSTEM FOR CONTINUOUS MONITORING OF UNDERGROUND STORAGE TANKS COMPRISING A PROBE POWER INDICATOR, INDIVIDUAL PROBE ALARMS, TEST SWITCHES, CONDUIT FOR PROBE CABLES, WEATHER PROOF ENCLOSURE, VISUAL ALARM, AUDIBLE ALARM AND CONDUIT FOR AC POWER, RELAY CONTACTS AND ANALOG SIGNAL OUTPUTS
Electrical and Scientific Apparatus