Apera Instruments 201-C User Manual

Brief Introduction

Apera Instruments 201-C pH Electrode is featured with a proprietary lithium glass membrane for fast
and stable readings. The gel inner reference solution does not need to be refilled. This electrode is
designed for testing in general water solutions. The electrode may NOT work well in the following
situations:
1. Long-term testing in high temperature solutions (>122°F or 50°C)
2. Frequent testing in strong alkaline (>12 pH) or acid (<2 pH) solutions
3. Testing low ionic strength solutions like distilled or deionized water
4. Testing caustic solutions that will corrode the polycarbonate housing of the electrode

Technical Specifications

Range
Housing
Junction
Reference electrode
Reference solution
Connector
Cable length
Dimension
Temperature sensor
Operating temperature

How to Install the Electrode

1. Find the BNC socket (where it shows pH ORP) on the pH meter; Open the rubber cap; Insert the
blue BNC connector of the electrode to the BNC socket while twisting clockwise until it's locked.
2. After installing the new electrode to your meter, a 3-point calibration must be performed to ensure
the accuracy.

How to Use the Electrode

1. There is a proper amount of storage solution in the storage bottle on top of the electrode. The pH
glass sensor tip is soaked in it to keep its sensitivity.
2. Before measuring, loosen the bottle cap, then pull out the electrode while twisting
counterclockwise. Place the storage bottle at a safe position.
3. Rinse the electrode with purified water and shake off excess water or blot-dry it with clean tissue
or filter paper. Never rub the glass membrane.
201-C pH Electrode User Manual
0 to 14 pH
Polycarbonate
Single ceramic
Ag/AgCl
Gel KCL
BNC
3 Ft
ø12*160 mm
N/A
32 to 176°F (0 - 80°C)