Aquarium Temp ORP Salinity TDS Meter Water Quality Tester Swimming Pool
It can be used as a classic water quality tester even if it is not connected to a smartphone. ORP range: ± 999mv. Salinity range: 0-10000ppm, 10.1-200.0ppt, 0.01% - 25.00%. TDS range: 0-9999ppm, 10.1 - 200.0ppt.