Easy to read LCD Counts to 99,999 Fail-safe reset Weighs only one ounce Each time a black mark is made with the felt-tipped pen, it automatically sounds a beep, and LCD displays the counts. Use it to count cell growth on petri dishes, inventory parts, and tally samples received. Touch, sound,…

Consists of a shallow glass cell, 17.9 mm diameter x 0.4 deep, provided with two charging channels, 2 mm wide x 5 mm long For counting smaller plankters, use 43X dry objectives of approximately 0.65 n.a. and 4 mm e.f. See C.M. Palmer and T.E. Maloney. American Society of Limnology and…

Weighs less than an ounce Easy to read LCD Counts to 99,999 Fail-safe reset Key-Chain/Wrist-Strap/Carabiner Digital Counter is designed for ease-of-use and fail-safe counting. Features include display count to 99,999, two year constant use battery, water-resistant, O-ring-sealed with…

Metal construction for long life Single-hand use Quick manual counting