Jing, "Bank tally counter" is much more cheaper than plankton counters, and you can find them around $30. It also has five or six keys. Just google for it, and you can find a bunch of vendors easily. Although it is designed for tabletop use, you can devise something to make it portable in the field.
Makiri Makiri Sei, Ph. D. Postdoctoral Fellow 146 Pearson Hall Department of Zoology Miami University Oxford, OH 45056 (513)-529-3175 ________________________________________ From: Ecological Society of America: grants, jobs, news [[email protected]] On Behalf Of Cochran-Stafira, D. Liane [[email protected]] Sent: Friday, July 10, 2009 4:08 PM To: [email protected] Subject: Re: [ECOLOG-L] Dual counter Jing, What about the counters for blood labs or plankton. These are mechanical, and can take multiple types of counts (ex. cells or animals). Try Fisher or one of the other large lab suppliers. Carolina Biological has one with 5 keys for $265.00 (#NP-70-0688). Hope this helps. Liane **************************************** D. Liane Cochran-Stafira, Ph.D. Associate Professor Department of Biological Sciences Saint Xavier University 3700 West 103rd Street Chicago, Illinois 60655 phone: 773-298-3514 fax: 773-298-3536 email: [email protected] http://faculty.sxu.edu/~cochran/ <http://faculty.sxu.edu/~cochran/> ________________________________ From: Ecological Society of America: grants, jobs, news on behalf of Jing Luo Sent: Tue 7/7/2009 4:33 PM To: [email protected] Subject: [ECOLOG-L] Dual counter Dear listers, I'm looking for a manual counter (mechanic or electric) to count flowers in the field. Since we are studying monoecious plant, female and male flowers need to be counted separately. It would be ideal to have a counter capable of counting two objects (e.g. use thumb to click button for male and index finger for female flowers). We have bought this electronic dual pitch counter (http://tallycounterstore.com/ps116_electronic_pitch_counter_1.html), but you have to press a button each time you switch between two objects (which is very inconvenience). Does anyone have any recommendations for a counter that fit our application purpose? Thanks. Jing
