schemes of pH meters by Radelkis

[ca210306]

Hi!
I prepare two books to print now and one from the ones it is "Electronic
circuits for signals of sensors". In this I would like to have a some
practical examples of a use of circuits to chemosensors. Has (only scheme !
not all servis manual !!!!!!) of Radelkis´ pH meters: OP208/1, 211/1 and
264/1 anybody and is it possible to send me scanned it (jpg, pdf) ???

Thank You very much for any help to me:  Simon Cihelnik
s.cihelnik at worldonline.cz