Ppm meter

can i use a tds ppm meter for hydroponics?
heres a link to the one im looking at
HM Digital TDS-EZ Meter/Tester, Water/ppm/Purity/TDSEZ - eBay (item 300204707369 end time Mar-15-08 15:15:08 PDT)

this is the exact same one i bought. works great for me, ive never had any problems with it. i am in soil, although im not sure how it would function differently for hydro. i would def recommend it

Yes a tds metter is a ppm meter ppm is TDS..Make sure its a 0-9999 meter