Datasheet

Half-cell operating principle

Back in the day, ORP probes would come with a separate reference probe, which is crucial

for accurate readings. Modern day ORP probes have the reference built in, creating an all

in one package. In order for Atlas Scientiﬁc to get the size of our Micro ORP probe down

to 6.2mm, we had to separate the reference into its own micro probe.

Both ORP and reference micro probes are needed in order to take accurate readings.

1940's ORP probes

(Half-cell ORP & Reference) (Half-cell ORP & Reference)(Half-cell ORP & Reference merged into one)

These probes are too small

to be a combination probe.

Combination probeORP Reference

Modern probes New Micro probes

+ =

Silver chloride

Reference wire

4M KCL

reference solution

Platinum wire

Micro

ORP probe

Micro

Reference probe