Industrial ORP Probe - Atlas Scientific
ORP stands for oxidation/reduction potential. Oxidation is the loss of electrons and reduction is the gain of electrons. The output of the probe is represented in millivolts and can be positive or negative.
Just like a pH probe measures hydrogen ion activity in a liquid; an ORP probe measures electron activity in a liquid. The ORP readings represent how strongly electrons are transferred to or from substances in a liquid. Keeping in mind that the readings do not indicate the number of electrons available for transfer.
This Industrial ORP Probe can be fully submerged in fresh water or salt water, up to the tinned leads indefinitely.