ph, tds salinity tester

[Jimsreef]

Randy

Would this be an accurate tester for ph, salinity and tds readings for my reef tank? Jim
http://www.tequipment.net/ExtechEC500.asp

[Randy Holmes-Farley]

It does not read high enough in salinity to determine the salinity of seawater (35 ppt, it maxes out at 10 ppt).

I do not know how many pH calibration points it uses. 2 is much bettter than 1.