Apera Instruments LabSen761 User manual

LabSen761 Blade Spear pH Electrode
User Manual
LabSen electrochemical sensors are premium pH electrode with manufacturing technology and key
components imported from Switzerland. LabSen761 places the tapered glass membrane in a
stainless steel shaft with blade. This probe is suitable for pH measuring of fish, meat and meat
products.
This Electrode has following features:
•LabSen® S-type spear sensor tip featured with high firmness and fast response, designed for
direct measurement of solid samples
•Food-grade titanium blade sheath, easily piercing into hard samples while providing strong
protection to the sensor
•Open&Ceramic double-junction with Polymer electrolyte. No more junction clogs.
•Long life reference system improves the stability of the reference system and extends the
electrode’s service life.
•Blue gel inner solution - does not flow and will not generate air bubbles
1 Technical Data
Measuring Range
(0 ~ 14) pH
Electrolyte
Polymer
Temperature Range
(0 ~ 80) °C
Soaking Solution
3M KCl
Membrane Type
S
Membrane Resistance
<250MΩ
Shaft Material
Food-Grade Titanium
Electrode Dimension
(Ø12×115) mm
Reference
Long Life
Connector
BNC
Junction
Ceramic+Single Pore
Cable
Ø3×1m
2 How to use
1. Insert the blue BNC connector of the electrode to the BNC socket of your pH meter
while twisting clockwise until it’s locked.
2. Before measuring, twist off the storage bottle cap (see graph on the right),
pull out the electrode and rinse it off with distilled or deionized water.
3. Perform at least a two-point calibration before measuring after connecting
the new electrode to your pH meter.
4. After using, put the electrode back into the storage bottle and twist on the
bottle cap.
3 Maintenance
1. When not in use, the electrode should be soaked in the storage bottle containing 3M KCL soaking
solution to keep the glass membrane and junction in a healthy condition. Clean the bottle and
replace the soaking solution if it gets contaminated. The electrode should never be stored in pure

water such as deionized or distilled water.
2. The electrode is only as accurate as it is clean. Always thoroughly rinse off the probe before and
after each measurement with pure water in a container or with a wash bottle.
3. The transparent polymer gel electrolyte will inflate and ooze out a bit when it’s soaked in KCL
solution. This will not affect the measurement of the electrode, and it will happen more frequently
with newer electrodes. This is a “self-clean” situation especially when the junction gets
contaminated. Just wipe off the inflated gel with clean tissue and continue to use the electrode
as normal.
4. When piercing meat (especially frozen meat), avoid bending the spear tip. Wash the electrode
and the titanium sheath with soap water after measurement, the titanium blade can be screwed
off and cleaned separartely if necessary.
5. The connector of the electrode should be kept clean and dry. If contaminated, please clean it
with medical cotton and absolute alcohol and blow dry to prevent the short circuit of the electrode
and slow reaction of electrode.
6. For tough contaminants, soak the electrode in Apera cleaning solution (AI1166) for 30 minutes.
Then use a soft brush to remove the contaminants. Afterwards, soak the electrode in 3M KCL
soaking solution for at least 1 hour. Rinse it off, then re-calibrate it before using again.
7. The connector of the electrode should be kept clean and dry. If contaminated, please clean it
with medical cotton and isopropyl alcohol and blow-dry it to prevent short circuit of the electrode
or slow response of the electrode.
8. The electrode should avoid testing strong acid and strong alkali solutions, as well as dehydrating
media such as absolute ethanol and concentrated sulfuric acid. If testing such solutions, the
immersion time should be minimized and the electrode should be carefully cleaned after use.
9. Every pH electrode will eventually age and fail. The typical service life of Apera pH electrodes is
12-24 months depending on the frequency of usage and how well you keep it clean and properly
stored. We recommend replacing your electrode every 12-18 months to ensure the best accuracy.
4 Warranty
We warrant this electrode free from defects in material and workmanship and agrees to repair or
replace free of charge, at option of APERA INSTRUMENTS any malfunctioned or damaged product
attributable to responsibility of APERA INSTRUMENTS for a period of six months. Warranty period
is the time limit to provide free service for the products purchased by customers, not the service life
of the tester or electrodes.
APERA INSTRUMENTS (Europe) GmbH
Address: Wilhelm-Muthmann-Str.18, | 42329 Wuppertal, Germany
Phone: [phone] | Email: [e-mail] | Website: www.aperainst.de