Hach is your best bet. Their test kits are the norm in water chemistry and are used almost exclusively in all types of industrial water analysis and control. They make kits for all type of analysis, from single element, to wide range programmable units. The kits come with pH and / or conductivity meters and range from wet chemistry titrations to direct read colorimeter or photometers.
David,
The end point on a titration is usually at the 1st indication of the color change. If you are talking about a phenolthalein alkalinity end point to determine hydroxide alaklinity, then you read at the 1st indication of clear turning to pink (reverse titration) or from pink to clear (acid titration). For hardness titration, you need to titrate to a completely blue end point where the pink color is completely gone. If you question the results, go slow near the end point and watch for the color change. Run the test a few times and average the results.
Mike
