[Pat Purcell]

Anyone have one of  these, is it handy ,not handy, useless,

http://cgi.ebay.com/Dual-In-Line-TDS-Meter-for-RO-DI-Reverse-Osmosis_W0QQitemZ300093328675QQcategoryZ117435QQrdZ1QQcmdZViewItem

[rugby]

they are handy in that its an instant reading,but the external tds meters (the one that looks like a thermometer that you dip into the water)gives a more accurate reading.

[Pj]

They are very handy.
Mine reads exactly the same as my hand held one, and has for a year and half.

[Pat Purcell]

Thanks for the replies,

[JM123]

Pat I had that very model - it was very accurate and always agreed with the handheld. 

[AuRavelling79]

Pat I had that very model - it was very accurate and always agreed with the handheld. 

Same here - still use one.