Colony counter, handheld, battery-operated

Mark, count, and receive an audible and visual alert each time a count is registered|Store up to 35 sample counts in memory|Backlit display for easy viewing in low light|Felt-tip markers work on plastic or glass|Handheld Electronic Colony Counter. A cost effective and accurate way to count colonies of bacteria or other microorganism grown on an agar plate. This hand-held, simple-to-operate device marks, counts, and gives an audible and visual alert each time a count is registered on the easy-to-read, backlit digital display. Store up to 35 sample counts in memory and display the sum total of all colonies counted. The audible alert can be turned off if desired and the counting function locked to prevent errors during breaks between counting. The lightweight, pen-style design reduces the likelihood of error, combining all aspects of counting into one motion. Error is further reduced when counting both up and down to verify sample counts. The long life, red and black felt-tip markers work on plastic or glass and are oil and water resistant. Ink marks are removable with ethyl alcohol. Counter includes a protective storage case, red and black felt-tip markers, and 3 V lithium battery.