Vernier Software and Technology
Vernier Software & Technology

Go Direct Electrode Amplifier

Go Direct™ Electrode Amplifier product image

The Go Direct Electrode Amplifier is a mV and pH amplifier that connects to Vernier electrodes and compatible third-party BNC electrodes. It directly connects wirelessly via Bluetooth® or wired via USB to your platform.


The Go Direct Electrode Amplifier offers an affordable way to expand your experiment options. Its BNC connector provides the flexibility to attach and remove a Vernier electrode, such as the pH Electrode, Flat pH Electrode, ORP Electrode, ISE electrode, or a third-party electrode. You can explore pH one day and potassium concentrations the next.

Because the Go Direct Electrode Amplifier is compatible with third-party electrodes, students learn consistent calibration and handling techniques on one amplifier using one software program. When electrodes expire or become damaged you need only replace the electrode—lowering your overall equipment costs.

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.


  • Units: pH or mV
  • Input range (mV): ±1000 mV
  • Input range (pH): 0 to 14 pH
  • Accuracy with new electrode (mV): ±20 mV
  • Accuracy with new electrode (pH): ±0.2
  • Connections:
    • Wireless: Bluetooth
    • Wired: USB

View the Go Direct Electrode Amplifier user manual

Compatibility Requirements

  • LabQuest 2
    LabQuest 2

    Partial Support

    The Go Direct Electrode Amplifier is partially compatible with LabQuest 2 (version 2.8), a standalone data logger with built-in graphing and analysis software. Please see the compatibility notes below for details.

    Learn more about LabQuest 2 »

    Compatibility Notes

    1. Connect this sensor via USB. Wireless data collection is not supported.
  • Computers

    InterfaceGraphical Analysis 4 for ComputersVersion 4.2.2
    No interface requiredFull support 1 2

    Compatibility Notes

    1. Requires a BNC electrode
    2. 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 4.2.2
    No interface requiredFull support 1

    Compatibility Notes

    1. Requires a BNC electrode
  • Mobile Devices
    Mobile Devices

    InterfaceGraphical Analysis 4 for iOSVersion 4.0.2Graphical Analysis for AndroidVersion 4.0
    No interface requiredFull support 1Future support 1

    Compatibility Notes

    1. Requires a BNC electrode

What’s Included

  • Go Direct Electrode Amplifier
  • Micro USB Cable

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
Go Direct Electrode AmplifierGDX-EA$49
Optional Accessories
Electrode SupportESUP$10
Go Direct Charge StationGDX-CRG$69
Go Direct Ammonium Ion-Selective Electrode BNCGDX-NH4-BNC$186
Go Direct Calcium Ion-Selective Electrode BNCGDX-CA-BNC$186
Go Direct Chloride Ion-Selective Electrode BNCGDX-CL-BNC$186
Go Direct Flat pH Electrode BNCGDX-FPH-BNC$68
Go Direct Glass-Body pH BNC ElectrodeGDX-GPH-BNC$84
Go Direct Nitrate Ion-Selective Electrode BNCGDX-NO3-BNC$186
Go Direct ORP BNC ElectrodeGDX-ORP-BNC$42
Go Direct pH BNC ElectrodeGDX-PH-BNC$40
Go Direct Potassium Ion-Selective Electrode BNCGDX-K-BNC$186


Related Products

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

Go to top