Apera PC8500 Portable pH Conductivity/TDS/Salinity Meter Kit
6-in-1 Waterproof pH/ORP/TDS/EC (Conductivity)/Salinity/Temp Meter Pocket Size Multi-Parameter Water Quality Tester Kit Replaceable ORP Probe: Amazon.com: Industrial & Scientific
Myron L 6PIIFCE Conductivity, Resistivity, TDS, pH, ORP/Free Chlorine, Temperature Meter: Amazon.com: Industrial & Scientific
Amazon.com: 5 in 1 TDS Meter Digital PH Tester, 0.01 High Accuracy PH Meter for Water, PH/TDS/Conductivity/Salinity/Temp Tester, PPM Meter Water Tester for Drinking Water, Hydroponics, Plants, Aquarium and Pool : Industrial
6-in-1 Pentype Conductivity Tester Temperature TDS ORP Salinity Water Quality IP57 Design Taiwan Made - AliExpress
HQ4100 Portable Multi-Meter, pH, Conductivity, TDS, Salinity, Dissolved Oxygen (DO), ORP, and ISE, 1 channel, w/o electrodes | Hach
HQD® HQ440D General Purposes Water Laboratory pH and Conductivity/TDS Meter Package | Hach
PC400 Portable pH/Conductivity/TDS Meter Kit, ±1% FS, ±0.01 pH, Multi-Parameter, TDS, pH, Conductivity (EC) Write a review | Southern Labware
Extech 341350A-P Oyster Series pH/Conductivity/TDS/ORP/Salinity Meter with Polymer Cell
Milwaukee MW804 PRO Waterpoof 4-in-1 pH / Conductivity / TDS Tester with Thermometer and Replaceable Probe
Hanna HI98129 Combo pH/Conductivity/TDS Tester, Low Range
Extech - 0 to 14 pH, pH/Conductivity Meter - 88636949 - MSC Industrial Supply