That provides accurate measurement of pH, oxidation-reduction potential(ORP), conductivity, salinity, and total dissolved solids (TDS).Starter pen meter are the economical,Durably Constructed to Withstand Wear and Tear Resulting from Repetitive use
conductivity tester, handheld device provides a qualitative visual indicator of the conductivity of different solutions, acids or salts, Two brass probes can be touched to a solid substance, or immersed in a liquid, to show conductivity on green LEDs
Simple Operation in a Slim and Portable Design,Durably Constructed to Withstand Wear and Tear Resulting from Repetitive use,Waterproof Housing Protects the meter in their Working Environment,measurement of pH, oxidation-reduction potential(ORP), conductivity, salinity.