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10-05-2009, 02:18 AM#10
OPSenior Member
HANNA INSTRUMENT
HANNA HI 98129 Waterproof pH/EC/TDS/ºC/ºF Combo Tester
or
oakton waterproof PTTestr 35(pH/TDS)
cause i just want a pen to read tds(tds is ppm rite like 200 or 1400 ) i dont want the two numbers like 0.4 or 2.8
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