Microprocessor colony counter 6 digit seven segment, range 0-999999 with Averaging, Count Correction and 100 Sample Storage facility. Microprocessor colony counter 4 digit seven segment, range 0-9999 with Averaging, Count Correction and 100 Sample Storage facility. Microprocessor colony counter 3 digit seven segment, range 0-999 with Averaging, Count Correction and 100 Sample Storage facility. Digital colony counter 6 digit LED display, Range-999999 Digital colony counter 4 digit LED display, Range 0-9999 Digital colony counter 3 digit LED display, Range 0-999