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pH Sensor Troubleshooting and FAQs

About this FAQ

  • Created Dec 21, 2004
  • Updated Jan 7, 2014
  • Article #1361

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pH Sensor, order code PH-BTA, $79
Specifications and User Guide

TROUBLESHOOTING
- Primary Test: Does it read approximately 4 in its storage solution? (pH 13-14 indicates 0 volts, possibly a defective or damaged sensor)

- Secondary Test: Take readings in fresh buffers, NOT distilled water! If no buffers are available, try it in vinegar (~ pH 2.5-3.5) and ammonia (~ pH 10.5-11.5). If readings do not change when the sensor is placed in different solutions, the sensor is possibly defective or damaged.

RELATED TIL ENTRIES

CALIBRATION
-TIL 2442: How do I save a custom calibration to my pH sensor?
-TIL 2341: How do I manually calibrate my sensor in Logger Pro?
-TIL 2010: Why won't my pH Sensor calibrate?

OPERATION
-TIL 782: The glass bulb of my pH Sensor is broken. Can it be repaired?
-TIL 730: The pH electrode I have been using no longer seems to work or is slow to respond. Is there anything I can do to fix it?
-TIL 1286: Why doesn‘t my pH Sensor read pH 7 in distilled or deionized water?
-TIL 638: Why am I getting interference when I put two sensors in the same solution?
-TIL 1599: What type of liquids cause problems for the pH Sensor?
-TIL 2166: The liquid inside my pH Sensor is low or gone. Will it still work?

MAINTENANCE AND STORAGE
-TIL 369: Where do I get pH Storage Solution? (Buffer Storage Solution)
-TIL 2338: What do I do about mold growth in my bottle of pH electrode storage solution?
-TIL 728: How can I keep my pH or ORP storage solution from spilling when the sensor is in use?
-TIL 2201: My pH sensors were stored dry. Will they still work?
-TIL 706: What is the best way to clean the glass bulb of the pH electrode?
-TIL 1060: Do any of your sensors require special storage?
-TIL 2174: I bought your pH buffer capsule kit (order code: PHB). Can I make storage solution for my pH Sensors with this kit?
-TIL 2270: How do I dispose of my pH sensor?
-TIL 3032: My pH Sensor has mold inside the shaft. How do I remove it?

SPECIFICATIONS
- order code: PH-BTA
- Range: 0-14 pH units
- Type: Sealed, gel-filled, epoxy body, Ag/AgCl internal reference, 12 mm OD
- Storage solution: KCl/pH 4 buffer solution (10 g KCl in 100 mL buffer pH-4 solution)
- Response time: 90% of full reading in 1 second
- Temperature range: 5 to 80 deg C
- Accuracy: +/- 0.2 pH units

CALIBRATION
- Calibrate? Usually no. However, for the most accurate measurements with this sensor, we recommend calibration. It is a simple process that only takes a few minutes. Custom calibrations can also be stored directly onto the sensor.
- For calibration instructions, see: TIL 2341: How do I manually calibrate my sensor in Logger Pro?
- To save a calibration to a particular sensor, see : TIL 2442: How do I save a custom calibration to my pH sensor?

RELATED VERNIER PRODUCTS
- for buffers pH 4, 7, 10, pH Buffer Capsules, order code PHB, $12 (4 tablets each), add to 100 mL distilled water.
- pH Storage Solution, order code PH-SS, $16 (500 mL bottle)
- pH Storage Solution Bottles (5), order code BTL, $10 (5 bottles)

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