Vernier Software and Technology
Vernier Software & Technology
Skip to content
  1. Vernier.com

Go Direct® Potassium Ion-Selective Electrode

Go Direct® Potassium Ion-Selective Electrode product image
Order Code
GDX-K
U.S. Educator Price
$239
Grade level
Recommended for College and High School
Requirements
No interface needed and free app available.
Resources
User manual

The Go Direct Potassium Ion-Selective Electrode (ISE) can be used to measure the concentration of potassium (K+) ions in aqueous solutions. It connects via Bluetooth® wireless technology or wired via USB to your device.

Description

Use the Go Direct Potassium Ion-Selective Electrode to wirelessly measure levels of potassium ions.

The versatile BNC connector allows students to easily replace the electrode when it expires or becomes damaged. You need only replace the electrode and not the entire sensor—lowering your overall equipment costs.

The Go Direct Potassium Ion-Selective Electrode has a combination-style, non-refillable, gel-filled electrode. Like all other PVC ISE membranes, the membrane on the ISE has a limited life expectancy. However, the replaceable module of ISE allows you to simply discard the used membrane module and replace it with a new one.

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 wireless technology, allowing you to choose the solution best for your classroom or laboratory.

Note: We recommend that you do not purchase ISE replacement modules too far in advance of their expected time of use as degradation occurs while they are stored on the shelf.

Important: Ion-Selective Electrodes require good chemical technique and careful calibration to obtain accurate results; they are not recommended for middle school or elementary students.

Specifications

  • Range (mV): ±1000 mV
  • Range (concentration): 1 to 39,000 mg/L (or ppm)
  • Accuracy: ±10% of full scale (calibrated 10 to 1000 mg/L)
  • Interfering ions: Cs+, NH4+, H+, Ag+, Li+, Na+
  • pH range: 2–12 (no pH compensation)
  • Temperature range: 0–40°C (no temperature compensation)
  • Electrode slope: 56 ±3 mV/decade at 25°C
  • Electrode resistance: 100 to 200 kΩ
  • Minimum sample size: must be submerged 2.8 cm (1.1 in)
  • Connections:
    • Wireless: Bluetooth
    • Wired: USB

Compatibility Requirements

  • LabQuest 2
    LabQuest 2

    Partial Support

    The Go Direct® Potassium Ion-Selective Electrode is partially compatible with LabQuest 2 (version 2.8.1), 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
    Computers

    Software
    InterfaceGraphical Analysis 4 for ComputersVersion 4.3.1
    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
    Chromebook

    Software
    InterfaceGraphical Analysis 4 for ChromeVersion 4.3.1
    No interface requiredFull support

  • Mobile Devices
    Mobile Devices

    Software
    InterfaceGraphical Analysis 4 for iOSVersion 4.0.3Graphical Analysis for AndroidVersion 4.0
    No interface requiredFull supportComing soon

What’s Included

  • Go Direct ISE Amplifier attached to a Potassium Ion-Selective Electrode BNC
  • Micro USB cable
  • 30 mL bottle of High Standard solution with SDS (1000 mg/L K+)
  • 30 mL bottle of Low Standard solution with SDS (10 mg/L K+)
  • Short-Term ISE Soaking Bottle

Ordering Information

All prices are for U.S. educators.

NameOrder CodePriceQuantity
Go Direct® Potassium Ion-Selective ElectrodeGDX-K$239
Optional Accessories
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® Nitrate Ion-Selective Electrode BNCGDX-NO3-BNC$186

Support

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