WELLOG                                         SIEMENS AND MHOS

Revised: 5-04-2007

Mhos are used to describe the measurement of Conductance. Conductance is the reciprocal of Resistance.

Mho is Ohm spelled backwards!

The Mho (conductance) is the reciprocal of Ohm (resistance).   For example:  2 Ohms = ½ Mho.

All units may also be expressed in deci, milli, micro, etc. For example: 1 milli-mho = 1000 ohms.

10 Ohms = 1/10 Mho = 100 milli-mhos

OTHER UNITS OF CONDUCTANCE:

One Siemens (SI units) = 1 Mho (MKS units)

1 milli-siemens = .001 mho = 1000 ohms

10 milli-siemens = .01 mho

100 milli-siemens = .1 mho

1000 milli-siemens = 1 mho

1 deci-siemens = .1 mho

10 deci-siemens = 1 mho

1 centi-siemens = .01 mho

1 centimeter = .01 meter.

.5 deci-Siemens = 50 milli-mhos

Conductivity is expressed in terms of a volume, meters, cubic meters, cubic centimeters, etc. It is a reciprocal of resistivity.

1 milli-mho/meter = 1 milli-siemens/meter

.5 deci-siemens/meter = 50 mhos/cm (centimeter is 100 times smaller and 50 is 100 times larger than .5)

A scale of 100 to 19,900 micro-siemens/meter = .1 to 19.9 milli-mhos/meter.

1 milli-mho/cm = 100 milli-mhos/meter  = 1 deci-siemens/meter

1 ohm-meter = .1 mho/meter = 100 milli-mhos/meter

10 ohm-meters = 10 milli-mhos/meter = 1 mho/cm.

For more information on units of conductivity and resistivity contact info@wellog.com