Apera LabSen AI3102 User manual

LabSen® 221 pH Electrode
User Manual
LabSen® pH electrodes are made with proprietary sensor technologies and key components from
Switzerland. LabSen® 221 Combination pH Electrode is designed for high-precision pH
measurement of viscous and low ionic strength solutions as well as general water solutions.
Features(
• Built with LabSen® S-type cylindrical glass membrane, featuring low resistance (fast
response) and high firmness
• No more air bubbles inside the glass membrane thanks to the Swiss blue gel electrolyte.
• Movable sleeve junction, adjustable infiltration rate of electrolyte, easy to clean
• The long-life reference system significantly increases measuring stability and extends service
life.

Technical(Specifications(
Measuring Range
0 - 14 pH
Temp e r at u r e R a n ge
-5 - 80 °C
Membrane Type
S
Body Material
Lead-free Glass
Reference
Long Life
Junction
Moveable sleeve
Reference Solution
3M KCL
Soaking Solution
3M KCL
Membrane Resistance
<150MΩ
Temp e r at u r e S e n so r
N/A
Electrode Dimension
(Φ12×130) mm
Connector
BNC
Cable
Φ3×1m
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. Unplug the blue rubber plug to maintain a smooth electrolyte flow.
4. Perform at least a two-point calibration before measuring after connecting the new
electrode to your pH meter.
5. The reference solution will run low as you use the electrode. Whenever the
solution level falls to 1/2 height of the electrode, add 3M KCL solution to the
refilling hole (unplug the blue rubber plug) using a syringe or pipette.
6. After using, put the electrode back into the storage bottle, twist on the bottle cap, and plug in the refilling
hole.

How(to(Use(the(Movable(Sleeve(
As shown on the right picture, reference solution flows out of the small hole, seeps through the surface of the
movable sleeve. You may adjust the degree of firmness. The looser the movable sleeve is, the faster the
reference solution’s flow rate is, meaning you will get stabilized readings in a shorter time. Purified water and
low ion concentration solutions measurements require faster flow speed. The
electrode must be recalibrated after tightness adjustment.
To lo o sen the mo vab l e sl e eve, push up the movable sleeve. If it is too tight to
push up, please place the probe onto the orange round tube (included in the box),
and press down the electrode with force, then the movable sleeve will be loose.
And then screw counterclockwise to loosen the movable sleeve or clockwise to
tighten it.
Maintenance(
1. When not in use, the electrode should be soaked in the storage bottle containing 3M KCL soaking solution
(SKU: AI1107) to keep the glass membrane and junction in a healthy condition. Clean the bottle and
replace the soaking solution if it’s contaminated or insufficient. 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. 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.
4. 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.
5. 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.
6. 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.

Warranty(
We warrant this electrode to be free from defects in material and workmanship and agree to repair or replace
free of charge, at option of APERA INSTRUMENTS, LLC, any malfunctioned or damaged product attributable
to responsibility of APERA INSTRUMENTS, LLC for a period of SIX MONTHS from the delivery.
This limited warranty does NOT cover any damages due to:
Accidental damage, transportation, storage, improper use, failure to follow the product instructions or to
perform any preventive maintenance, unauthorized repair or modifications, normal wear and tear, or other
external causes or actions beyond our reasonable control.
To get the fastest warranty fulfillment, go to support.aperainst.com and click “New Support Ticket” on the
upper right corner. Type your email in the requester field, “Warranty” in the Subject field, and then input the
following information in the description field:
• Your full name
• Product model that needs warranty fulfillment
• Serial number of the product (can be found on the back sticker of the tester body)
• What problem or issue you had experienced with the product
• Attach a photo of your proof of purchase
• Attach a photo of the problematic product
Then click Submit. One of our customer care specialists will help you fulfill the warranty within one business
day.
APERA INSTRUMENTS, LLC
Address: 6656 Busch Blvd, Columbus, OH 43229 Phone: [phone]
Website: aperainst.com Email: [email protected]