Sansel instruments & controls provide a range of test and measuring instruments, colony counter. Model ccioo. Comes with the following features: 4- digit. 7-segment led; 0-9999 counts: the last data is kept on memory when power fails: quality lens is provided for clear viewing: long life electronic pen: Useful to count group of micro organism: useful in applications like food processing, pharmaceutical, mineral water: and 230v ac operation.