Portable pH / EC / TDS / ° C meter Hanna Instruments pH Meters - Unit of Detection: 0.1pH、10ppm、0.1℃、【EC】10μS/cm, Operating Ambient Temperature (℃): 0~50, Height (mm): 145, Mass (g): 230 | MonotaRO Philippines
Hanna Instruments HI 98129 Waterproof pH/Conductivity/TDS Tester : Amazon.ca: Industrial & Scientific