Apera Instruments LabSen 551 User Manual

LabSen electrochemical sensors are premium pH electrode with manufacturing technology and key
components imported from Switzerland. LabSen551 spear pH electrode adopts spear membrane,
which can easily pierce into solid or semi-solid medium. This probe is suitable for pH measuring of
fruits, vegetable and soil.
This probe has following features:
 Solid PVC housing, offers stronger protection.
 Blue gel inner solution, does not flow and will not cause bubble.
 Maintenance-free polymer electrolyte, non-diaphragm structure.
 Long life reference system, has better stability and service life.

1 Technical Data

Measuring Range
Temperature Range
Shaft Material
Membrane Shape
Reference
Junction

Usage and Maintenance

2
Connect BNC plug to the input on the pH meter.
2.1
Pull off the rubber cover. Set them aside (DO NOT pour out the KCl solution). Rinse the
2.2
electrode with distilled water. Put the electrode back in the rubber cover after use.
After long time exposure in air, Polymer electrolyte will cause shrinkage. It will not happen in
2.3
measurement status. The electrode must be soaked in 3M KCl solution for storage. After long
time soaking, there will be some floccules dissolving out from 3M KCl solution, this is normal
phenomenon.
The electrode's measuring tip should be soaked in the soaking cover containing certain
2.4
amount of storage solution to keep the membrane hydrated and junction unblocked. Clean the
cover and replace the storage solution if the storage solution gets turbid and mildewed. The
electrode should never be sinked in pure water or buffer solution for long.
The connector of the electrode should keep clean and dry. If being contaminated, please clean
2.5
it with medical cotton and absolute alcohol and blow dry to prevent the short circuit of the
electrode and slow reaction of electrode.
Spear pH Electrode is suitable for measure wet solid or semi-solid medium. Please forcibly
2.6
LabSen 551 Spear pH Electrode
User Manual
(0 ~ 14) pH
(0 ~ 80) °C
PVC Plastic
Tapered
Long Life
Ceramic+Single Pore
Electrolyte
Soaking
Solution
Electrode Electrode (Ø15×90) mm
Dimension Measuring Tip (Ø6×25) mm
Connector
Cable
Polymer
3M KCl
BNC
Ø3×1m