Tris-Compatible Flat pH Sensor (FPH-BTA)
Specifications and User Guide

-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.


How do I calibrate my sensor?
How do I calibrate a sensor in Logger Pro?
How do I save a custom calibration to my pH sensor?
During calibration, what are the typical potential output readings for the PH-BNC electrode?

My Tris-Compatible Flat pH Sensor reads mV instead of pH.
Why doesn't my pH Sensor read pH 7 in distilled or deionized water?
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?

What type of liquids cause problems for the pH Sensor?

The liquid inside my pH Sensor is low or gone. Will it still work?

Will I get interference when I put two sensors in the same solution?
Is the flat pH sensor more durable than regular pH sensor?

How can I keep my pH or ORP storage solution from spilling when the sensor is in use?
Where do I get pH or ORP Storage Solution? (Buffer Storage Solution)
What is the best way to clean the glass bulb of the pH electrode?
Do any of your sensors require special storage?
I bought your pH buffer capsules. Can I make storage solution for my pH Sensors with this kit?
My pH sensors were stored dry. Will they still work?
How do I dispose of my pH sensor?

– 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: How do I calibrate my sensor?
– In pH 4 buffer, the calibration voltage reading should be approximately 1.56
– In pH 7 buffer, the calibration voltage reading should be approximately 1.19
– In pH 10 buffer, the calibration voltage reading should be approximately 0.82

– for buffers pH 4, 7, 10, pH Buffer Capsule Kit (PH-BUFCAP)
pH Storage Solution (PH-SS) (500 mL bottle)
Storage Solution Bottles (5) (BTL) (5 bottles)