Add just a drop of bleach
(which is an oxidizing agent)
606.9
Reading A
Tap water
605.3
Reading B
A
B
-234.6
Reading A
Tap water
24.2
Reading B
A
B
An ORP probe has a platinum tip that is connected to a silver wire, surrounded by
silver chloride. That silver wire is then connected to a KCL reference solution. Be-
cause platinum is an unreactive metal it can “silently observe” the electron activity
of the liquid without becoming apart of whatever reaction is occurring in the liquid.
Platinum tip
Silver chloride
Silver wire
Reference wire
KCL reference solution
When reading the ORP of a liquid that has very few electrons available for transfer ORP
readings can appear to be inconsistent.
The water is unreactive and has only trace amounts of electron
movement.
These readings are equivalent to the readings you
see with an unconnected multimeter.
6
Copyright © Atlas Scientific LLC
