17
The useful unit for seawater is
milimhos/cm (mS/cm); seawater is
around 55 mS/cm. The useful unit
for freshwater is micromhos/cm
(µmhos/cm, or µS/cm); tap water
ranges between 50 and 800 µS/
cm (depending on the source).
The basic unit of fluid conductivity
is “mho/cm”, otherwise known as 1
Siemen. However, this unit does not
really occur in water, so we typically
use one thousandth (mili-) or one
millionths (micro-) of it for natural
waters (1000 milimhos and 1,000,000
micromhos are equal to one mho).
FLUID ELECTRICAL CONDUCTIVITY
Fluid Electrical Conductivity Reference:
Electrical Conductivity of Common Fluids
FLUID
TEMPERATURE
(°F)
CONDUCTIVITY
(µs/cm)
Coca Cola Syrup
68
600
Coffee Extract
183.2
5000
Corn Syrup
89.6
16
Ethylene Glycol (Pure)
68
1.07
Gin 90 Proof
77
10
ISO-propyl Alcohol
77
3.5
Molasses
50
300
RC Cola Syrup
77
600
Sugar Solution Dilute
86
585
Urea
77
5000
Vodka 100 Proof
77
4
Water, Distilled
-
0.04
Water, NYC
77
72
NOTE:
This table of fluid conductivity
is for reference only, to show the
relative conductivity of various fluids.
Since the list contains flammable
fluids, it is not to be construed as
a list of permissible fluids to be
used with QSE series meters.
NOTE:
QSE series meters are
for use with water, aqueous
solutions and other non-flammable,
electrically conductive fluids. Do
not use the meter with petroleum
products (diesel fuel, unleaded
gasoline, jet fuel, kerosene, etc.)
or other incompatible chemicals.
