Vernier sells three different categories of pH sensor depending on the type of pH electrode used: standard, tris-compatible flat pH, and glass-body pH. Use the images to determine which sensor you have.
Note: The dates indicate the approximate time frame when these sensors were sold.

Standard pH Sensors

Go Direct^® pH Sensor (GDX-PH)—current version

• This sensor was first sold in 2017 and is currently shipping.
• Sensor connects via USB or Bluetooth. No interface is required.
• Replacement electrode: Go Direct® pH BNC Electrode (GDX-PH-BNC)
• Go Direct pH Sensor Troubleshooting and FAQs
• Sensor User Manual

Go Wireless pH—sold from 2015 to 2017

• This sensor was sold from 2015 to 2017 and was replaced by the Go Direct pH sensor.
• Sensor connects via Bluetooth only and only to phones and tablets. No interface is required.
• Replacement electrode: Go Direct® pH BNC Electrode (GDX-PH-BNC)
• Go Wireless pH Troubleshooting and FAQs
• Sensor User Manual

pH Sensor (PH-BTA)—current version

• This sensor was first sold in 2012 and is currently shipping.
• This sensor requires an interface (e.g., Go!Link, LabQuest Mini, or LabQuest 3).
• Replacement electrode: None (sensor must be replaced)
• pH Sensor Troubleshooting and FAQs
• Sensor User Manual

PH-BTA—sold from 2006 to 2012

• This sensor was sold between 2006 and 2012.
• This sensor requires an interface (e.g., Go!Link, LabQuest Mini, or LabQuest 3).
• Replacement electrode: None (sensor must be replaced)
• pH Sensor Troubleshooting and FAQs
• Sensor User Manual

PH-BTA—sold from 2002 to 2006

• This sensor was sold between 2002 and 2006.
• This sensor requires an interface (e.g., Go!Link, LabQuest Mini, or LabQuest 3).
• Replacement electrode: None (sensor must be replaced)
• pH Sensor Troubleshooting and FAQs
• Sensor User Manual

PH-DIN—sold prior to 2002

• This sensor was sold until 2002.
• This sensor requires an interface (e.g., Go!Link, LabQuest Mini, or LabQuest 3).
• This sensor requires a DIN to BTA adapter to connect to an interface.
• This sensor does not auto-ID and cannot be used with Graphical Analysis.
• Replacement electrode: pH Electrode BNC (PH-BNC)
• Sensor User Manual

Tris-Compatible Flat pH Sensors

Go Direct^® Tris-Compatible Flat pH (GDX-FPH)—current version

• This sensor was first sold in 2017 and is currently shipping.
• Sensor connects via USB or Bluetooth. No interface is required.
• Replacement electrode: Go Direct® Flat pH BNC Electrode (GDX-FPH-BNC)
• Go Direct Tris-Compatible Flat pH Sensor Troubleshooting and FAQs
• Sensor User Manual

Tris-Compatible Flat pH Sensor (FPH-BTA)—current version

• This sensor was first sold in 2010 and is currently shipping.
• This sensor requires an interface (e.g., Go!Link, LabQuest Mini, or LabQuest 3).
• Replacement electrode: Flat pH Electrode BNC (FPH-BNC)
• Tris-Compatible Flat pH Sensor Troubleshooting and FAQs
• Sensor User Manual

Glass-body pH Sensors

Go Direct^® Glass-Body pH Sensor (GDX-GPH)—current version

• This sensor was first sold in 2017 and is currently shipping.
• Sensor connects via USB or Bluetooth. No interface is required.
• Replacement electrode: Go Direct® Glass-Body pH BNC Electrode (GDX-GPH-BNC)
• Go Direct Glass-Body pH Sensor Troubleshooting and FAQs
• Sensor User Manual

Glass-Body pH Electrode BNC (GPH-BNC)—current version

• This electrode was first sold in 2015 and is currently shipping.
• An Electrode Amplifier (EA-BTA) and an interface (e.g., Go!Link, LabQuest Mini, or LabQuest 3) are required to use this electrode.
• Replacement electrode: Glass-Body pH Electrode BNC (GPH-BNC)
• Glass-Body pH Electrode BNC: Troubleshooting and FAQs
• Sensor User Manual

Related Articles

• The glass bulb of my pH Sensor is broken. Can it be repaired?
• 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?
• My pH probe does not give an accurate reading. What should I do?
• Why does my pH sensor experience drift or calibration issues?
• How do I dispose of my pH sensor?
• Where do I get pH or ORP Storage Solution? (Buffer Storage Solution)
• What do I do about mold growth in my bottle of pH electrode storage solution?
• I bought your pH buffer capsules. Can I make storage solution for my pH Sensors with this kit?
• What is the best way to clean the glass bulb of the pH electrode?
• How can I avoid spilling pH storage solution?