Specifications

Electrodes | About pH Electrodes
Types of Reference Junctions
Reference Junctions
Some glass combination electrodes feature an anti-fouling annular
ceramic junction. The annular junction is formulated with a special
ceramic which encircles the glass bulb. Numerous pores in the ceramic
provide lower resistance and more stable pH readings. The plastic body
combination electrodes come standard with a porous HDPE pin junction.
Sleeve junction provides the highest ow rate for dicult samples.
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General Purpose Applications
Usually measures 120 mm (length) by
12 mm (diameter) and can be used for
general applications.
Specialty Applications
Eective for specic applications. For
instance the spear tip sensor can be
used for the direct pH testing of semi-
solids and soft materials. Sleeve type
electrode ensures high electrolyte ow
so it is ideal for low ionic strength and
viscous sample measurements. On the
other hand, a at surface tip electrode
is used for at samples like paper or
cloth. Micro-stem electrode ts into
thin stem NMR tubes or small vessels.
For harsh use, a durable tough bulb
electrode that is resistant to breakage
is recommended.
Porous HDPE Junction
Low electrolyte ow, hence more
durable.
Flushable Junction
Cleanses by pumping out electrolyte
to remove residue, thus eliminates
clogging problems in viscous samples.
Annular Junction
Fast electrode response.
Open Pore Junction
About 200 times larger than ceramic
junctions, ensures increased electrolyte
ow for stable junction potential.
General Purpose Vs Specialty Applications
Most electrodes come in different stem lengths and diameters for
specic applications.