Will this work for tds/ppm????

Hey I say this on Ebay and was wondering if it would be perfect for DWC?
http://cgi.ebay.com/HANNA-TDS-PPM-Ha...QQcmdZViewItem

it says it only goes to 999ppm

lol...somtimes your going to need to read more than that my nutes in my res are around 1200ppm right now.....

i h ave the hanna 4 in one temp, ec, tds , and ph its working flawless right now even tho i had some querks to even out in the begining

I would check that model because he is right a ppm reading of only 999 is not enough to finish flower.