bbesler@vela.acs.oakland.edu (Brent Besler) (03/16/90)
>Does anyone know of electronic/electric devices in the market that >are made/could be modified to measure water hardness and pH? Such devices are very common in analytic chemistry done in the field. Electrodes are available whos potential is dependent only on the concentration of a single type of ion. This is true within limits. There will always be some interference. Potentiometric pH meters are pretty common lab devices. Perkin-Elmer and Beckman Instruments make them. I think Edmund Scientific also sells them. Measuring the hardness of water means determining the magnesium and calcium ion concentrations. Ion selective electrodes for these exist also. Try posting to sci.chem. You will probably get more response. I am not in analytic chemistry(I am in computation chemistry). Brent H. Besler
bbesler@vela.acs.oakland.edu (Brent Besler) (03/16/90)
Ion slective electrodes and meters for determining water hardness do indeed
exist. One source is Thomas Scientific(609) 467-2000. They have a number
of regional toll free numbers. The cost of the ion selective electrode for
water hardness is $395 and the various meters to which the electrode is hooked
run about $950. pH electrodes run about $85 and can be used on the same
meter.
Brent H. Besler