TDS Meter Specifications:
Lock function - makes it easy to read and record, press HOLD button then remove from test solution.
5 minute Auto Shut Off feature, so battery won't run down.
Measurement Range: TDS: 0 - 9990 ppm (parts per million)
Accuracy: ± 2%
Automatic temperature compensation: can automatically change the value of the value of 25 �.
Working temperature: 0 ~ 50 �
Ambient relative humidity: <85%
Net weight: 28g
Size: 142 x 23 x 13 mm
Tips:TDS = Total Dissolved Solids, which is any salt, metal or mineral in the water.