vivosun ph and tds meter combo, 0.05ph high accuracy pen type ph meter ± 2% readout accuracy 3-in-1 tds ec temperature meter, ul certified vivosun <b>your 1# choice to know water quality</b><br><br>the vivosun tds ec ph meter set is a professional water quality test meter.<br><br><b>ph meter specifications: </b><br>measure range : 0.00 - 14.00 ph<br>resolution : 0.01 ph<br>accuracy : ± 0.05 ph<br>calibration: two points automatic calibration button<br>power supply: 2 x 1.5v lr44 button battery (keep using more than 500 hours)<br>dimension:155mm*31mm*18mm<br>weight:50g<br><br><b>3-in1 tds ec temperature meter specifications:</b><br>lock function - makes it easy to read and record, the instrument will lock the reading result.<br>after the numerically result gets stable, press hold button then remove the meter out of test solution to read.<br>4 display modes: press shift button: tds - ppm & °c, ec - μs/cm & °c, tds - ppm & °f, ec - μs/cm & °f.<br>5 minute auto shut off feature, so battery won't run down.<br>measurement range<br>conductivity: 0 - 9990 μs/cm<br>tds: 0 - 9990 ppm (parts per million)<br>degrees celsius: 1.0 - 80.0°c<br>fahrenheit: 32.0 - 176.0°f<br>accuracy: ± 2%<br>net weight: 51g<br>size: 154 x 30 x 14 mm<br>tips: tds = total dissolved solids, which is any salt, metal or mineral in the water.<br><br>package includes:<br>1 x ph meter<br>1 x 3-in-1 tds ec temperature meter<br>2 x calibration packet<br>2 x carrying case<br>2 x user manual