4

Sep

EC Conversion Chart

EC Conversion Chart


Electrical conductivity (EC) is the ability of a material to transmit (conduct) an electrical current and is commonly expressed in units of milliSiemens per meter (mS/m).

Soil EC measurements may also be reported in units of deciSiemens per meter (dS/m), which is equal to the reading in mS/m divided by 100.
(1 dS/m = 0.01 mS/m)

1 microsiemens [μS]equals0.001 millisiemens [mS]
10 microsiemens [μS] equals0.01 millisiemens [mS]
100 microsiemens [μS] equals0.1 millisiemens [mS]
1000 microsiemens [μS] equals1.0 millisiemens [mS]

To convert fromToMultiply by
μS/cm mS/cm0.001
mS/cm μS/cm 1000
μS/cm dS/cm 0.001
dS/m μS/cm 1000
dS/m mS/cm 1
mho/cm μS/cm 1000
EC Units μS/cm 1

For water used for agricultural and irrigation purpose the values for EC and TDS are related to each other and can be converted with an accuracy of about 10% using the following equation:

TDS (mg/l) = 640 x EC (dS/m or mmho/cm or ms/cm).

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