A free pH booklet is available which contains valuable information on
basic pH measurement theory, pH measurement techniques, selecting the
proper pH electode for a particular application, and a pH
troubleshooting guide. The booklet is available from Lazar Research Labs.
Inc. by emailing service at lazarlab.com or faxing 1-213-931-1434. The
booklet can also be obtained from the Lazar web site at