A microprocessor-controlled photometer for monitoring microbial growth in multi-welled plates

Multi-welled microtitre plates provide a convenient means of handling 'large block' multifactorial experiments with microbial cultures. An inexpensive instrument, termed a 'Biophotometer', has been designed to monitor microbial growth in each well, by transmitted light measurements. Optional microcomputer control is employed to facilitate scanning of plates and data handling. A unique method for agitating cultures is incorporated into the system. Typical results are presented to illustrate the versatility of this system.