digital tds meter Measurement Range:TDS: 0 ~ 9999ppm Pen type digital tds meter, all in one, tds electrode is included, FEATURES* 0 ... operation in 5 mins* Easy to change the tds electrode*Microcomputer circuit, intelligent function, high accuracy* ... ) x 4 PCs* Pen type digital tds meter, all in one, tds electrode is included, easy for general ... included).Weight82 g (electrode included). digital ppm Meter