Posted by Brian Stevenson on May 06, 2008 at 08:21:49:
In Reply to: Re: Klett-Summerson Colorimeter
The only accessories one would need are colored glass filters, a couple of inches in diameter, if I recall correctly. A solution is placed in a test tube (there are actual official Klett tubes of high-grade glass, but most people used standard test tubes), and the tube is inserted into a hole between the lamp/filter and a detector. I used one in grad school during the mid-1980s, where we used it to determine optical densities of bacterial cultures. I also inherited one in my university lab when I started as a professor 10 years ago, but sent it to surplus as I had no need of it. Chances are that they sent it to the dump. I don't know of any scientist who still uses one. They aren't particularly attractive, are big and heavy. The ones I've used are an industrial grey color. Somebody might give you a few dollars for yours, but I wouldn't expect more than 5 - 10 dollars. Shipping would be much more than that.