Vernier Software and Technology
Vernier Software & Technology

Go Direct pH Sensor

Go Direct™ pH Sensor product image

The Go Direct pH Sensor is a general-purpose pH sensor used to monitor pH of aqueous solutions. It directly connects wirelessly via Bluetooth® or wired via USB to your platform.


The Go Direct pH Sensor is an important and versatile sensor for lab and field activities alike. It gives students the freedom to explore pH without the inconvenience of wires—no more spilled solutions or dangling wires. The Go Direct pH transmits live readings and captures data in real-time.

Use this sensor in a variety of experiments:

  • Conduct acid-base titrations.
  • Monitor pH change during chemical reactions.
  • Test the pH and alkalinity of bodies of water.
  • Investigate household acids and bases.

This sensor is comprised of a pH electrode connected to a Go Direct Electrode Amplifier via a BNC connector. This design enables you to use the Go Direct Electrode Amplifier with other Vernier electrodes, such as the Flat pH Electrode, ORP Electrode, ISE electrode, or a third-party electrode.

Rechargeable Battery—Ready When You Are

The Go Direct robust rechargeable battery offers long battery life and provides always-ready operation. Monitor battery life directly from our free Graphical Analysis 4 app. Should the battery run low, simply connect the sensor to the charging cable and keep on collecting—no interruptions or inconvenience to you or your students.

Wired or Wireless—The Flexibility to Choose

Our Go Direct sensors connect directly to your mobile device, Chromebook, or computer using our free Graphical Analysis 4 app—no additional equipment or software purchases are necessary. Go Direct sensors can be used wired via USB or wirelessly via Bluetooth, allowing you to choose the solution best for your classroom or laboratory.

Go Direct pH Teacher Pack

Buy more and save more. With our Go Direct pH Teacher Pack, you receive eight Go Direct pH Sensors and a convenient charging station that allows you to charge eight Go Direct sensors at a time. The Charging Station works with the following Go Direct sensors: Go Direct Temperature, Go Direct ORP, Go Direct Electrode Amplifier, Go Direct Conductivity, and Go Direct 3-Axis Magnetic Field.



  • pH range: 0–14
  • Accuracy with new electrode (pH): ±0.2
  • Type: Sealed, gel-filled, epoxy body, Ag/AgCl reference
  • Shaft diameter: 12 mm OD
  • Storage solution: pH-4/KCl solution (10 g KCl in 100 mL buffer pH-4 solution)
  • Connections:
    • Wireless: Bluetooth
    • Wired: USB

View the Go Direct pH Sensor user manual

Experiments and Lab Ideas

Select a lab book to see a list of experiments and more information.

Compatibility Requirements

  • LabQuest 2
    LabQuest 2

    Coming Soon

    A future update will support data collection with the Go Direct pH Sensor and LabQuest 2, a standalone data logger.

    Learn more about LabQuest 2 »

  • Computers

    InterfaceGraphical Analysis 4 for ComputersVersion 4.1
    No interface requiredFull support 1

    Compatibility Notes

    1. For Bluetooth® connectivity, only computers running Windows 10 or Mac OS X 10.10 or newer are supported. The computer must also have a compatible Bluetooth 4.0+ radio.
  • Chromebook

    InterfaceGraphical Analysis 4 for ChromeVersion 4.1
    No interface requiredFull support
  • Mobile Devices
    Mobile Devices

    InterfaceGraphical Analysis 4 for iOSVersion 4.0.1Graphical Analysis for AndroidVersion 4.0
    No interface requiredFull supportFuture support

What’s Included

Go Direct pH

  • Go Direct pH Sensor (includes Go Direct Electrode Amplifier)
  • pH storage solution bottle with pH storage solution
  • Micro USB Cable
  • Quick-start guide

Go Direct pH Teacher Pack

  • 8 Go Direct pH Sensors
  • 8 pH storage solution bottles with pH storage solution
  • Charging Station
  • 8 Micro USB Cables
  • Quick-start guide

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
Go Direct pH SensorGDX-PH$79
Go Direct pH Teacher Pack (includes Charging Station)GDX-PH-TP$652
Optional Accessories
Ammonium Ion-Selective Electrode BNCNH4-BNC$187
Calcium Ion-Selective Electrode BNCCA-BNC$187
Chloride Ion-Selective Electrode BNCCL-BNC$187
Electrode SupportESUP$10
Electrode Tip GuardETG$10
Flat pH Electrode BNCFPH-BNC$69
Glass-Body pH Electrode BNCGPH-BNC$85
Go Direct Charge StationGDX-CRG$40
Go Direct pH BNC ElectrodeGDX-PH-BNC$40
Nitrate Ion-Selective Electrode BNCNO3-BNC$187
pH Buffer Capsule KitPH-BUFCAP$29
Potassium Ion-Selective Electrode BNCK-BNC$187


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Educational use only: Vernier products are designed for educational use. They are not appropriate for industrial, medical, or commercial applications. Product usage disclaimer »

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