Conductivity: Conductivity is the ability of a substance to allow current to pass through it. It is related to the resistance value of the substance.Siemens/cm (centimeter),This unit hasChinese / Chinese S/cmChina-US-West/Rinni United Nations (MS)Two scales to meet the needs of users in most cases. KL-1383A ModelThe conductivity is waterproof, resistant to water.IP55 KL-1383BTMA conductivity meter, which can be walled or embedded to facilitate installation, operation, and maintenance.