Hand Tally Counter: Use for counting blood cells, bacterial colonies, drops of liquid, or any repetitive event. Tallies up to 9999. Features a quick-reset knob, lens for easy reading, and finger ring for a secure grip. Sturdy, chrome-finished metal construction. Measures 46 mm dia x 41 mm W.
Benchtop Counters: Mechanical, benchtop counters are ideal for determining the number of cells, counting parts, etc. Use with blood cell label or insert your own. Each key records up to 999. Total window keeps track of the total number of stokes made on all other keys; at one hundred totals, counter rings bell. Counter with 6-key measures 250 x 76 x 56mm. 9-key counter measures 320 x 76 x 56mm.