In-Situ pH/ORP Sensor User Manual
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Information subject to change without notice. In-Situ, In-Situ logo, iSitu, Baro Merge, Baro TROLL, HERMIT, iSitu, RDO, Pocket-Situ, RuggedCable, RuggedReader, TROLL, and Win-Situ
are trademarks or registered trademarks of In-Situ Inc. © 2013. All rights reserved.
For more information, contact In-Situ Inc.
221 East Lincoln Avenue, Fort Collins, CO 80524
1-800-446-7488 (toll-free in U.S. & Canada)
1-970-498-1500 (international & domestic)
www.in-situ.com
0059522 Rev. 006 04/13
Short-term Storage
Up to 1 week: Fill the electrode storage bottle with pH 4 buffer and immerse the sensor tip in the buffer. Tighten
the cap to prevent drying. Alternatively, pH 7 buffer can be used for a few days.
Long-term Storage
Greater than 1 week: Fill the electrode storage bottle with 10-20 mL of storage solution (Order No. 0065370) and
immerse the sensor. Tighten the cap to prevent drying.
Storage Recommendations
Prior to using the pH sensor after long-term storage, rinse the sensor with DI water and then soak it in pH 4 buffer
for 1 or 2 hours. This will saturate the glass bulb with hydrogen ions and prepare it for use.
Do not store the pH sensor in DI water because it will deplete the reference solution and drastically reduce the life
of the sensor.
Specifications
Type:
Platinum wire and glass sensing bulb with Ag/AgCl reference half-cell, replaceable
single junction,
single junction, replaceable reference filling solution
Range:
0 to 12 pH units, ± 1400 mV ORP
Pressure Rating:
211 m (692 ft)
Accuracy:
± 0.1 pH unit, ± 5 mV (ORP)
Resolution:
0.01 pH unit
Operating Temperature:
0 to 50° C (32 to 122° F)
Replacement Parts
Reference Filling Solution (60 mL)................................................................................................................................................0056900
ZoBell’s Solution (1L)..........................................................................................................................................................................0032100
pH Calibration Kit (1 L each pH 4, pH 7, pH 10, DI water)......................................................................................................0032080
Quick Cal (4 x 250 mL).......................................................................................................................................................................0033250
Reference Junction Kit (3 junctions, 60 mL reference filling solution...............................................................................0059620
Storage Solution (500 mL)................................................................................................................................................................0065370