New Pro Digital Electric TDS/EC Tester Water Quality Test Pen Temperature Meter

It can test the dissolved solids content and the EC value in water to check the water quality. It is easy to operate and has the lock function and

Hydromaster HM-200 ph/TDS/EC/Temp Meter by HM Digital

pH / EC / Temperature Meter ATC 3 in 1 Waterproof Pen Type

Digital TDS Meter - PPM, TDS & EC Tester

Hydroponic Meter PRO Kit, All-in-One pH Pen, Interchangeable Probe

Insten - TDS Meter Digital Water Tester for Drinking Water, 3-in-1

Yewhick Digital pH and TDS Meter Combo, High Accuracy Water

3 In 1 TDS EC Meter Temperature Digital LCD Water Testing Pen

5 In 1 TDS EC PH Salinity Temperature Digital Meter High Accuracy

The Triplett Model WQ120 waterproof (IP57) PH/TDS/Conductivity/Salinity Pen combines a flat surface pH electrode with a multi-range conductivity cell to measure pH, TDS, Conductivity, Salinity and Temperature. The flat surface electrode for pH can measure solids, semi-solids, and liquids. It simultaneously displays pH, TDS, Conductivity, or Salinity and Temperature and has an analog bargraph for viewing trends.

Triplett WQ120 - pH/Conductivity/TDS/Salinity Meter

The ISPRING TDS meter is a digital instrument that measures the TDS (Total Dissolved Solids), in the scale of ppm (parts per million) which indicates the amount of solid dissolved in the water. The lower the TDS, the purer the water. EPA suggests that the TDS of drinking water should be below 500 ppm. Besides the purity, water temperature also impacts TDS value. ISPRING 3-button TDS meter features 2 sensors, 1 for TDS and 1 for temperature.