Vernier Software and Technology
Vernier Software & Technology

Go Direct® Ammonium Ion-Selective Electrode

Go Direct® Ammonium Ion-Selective Electrode product image

The Go Direct Ammonium Ion-Selective Electrode (ISE) can be used to measure the concentration of ammonium (NH4+) in aqueous samples. It connects via Bluetooth® wireless technology or wired via USB to your device.

Description

Use the Go Direct Ammonium Ion-Selective Electrode to wirelessly measure levels of ammonium ions introduced from fertilizers. It can also indicate aqueous ammonia levels, if sample solutions are acidified to convert NH3 to NH4+.

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 Ammonium 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 18,000 mg/L (or ppm)
  • Accuracy: ±10% of full scale (calibrated 1 to 100 mg/L)
  • Interfering ions: K+, Li+, Na+, Cs+, Mg2+, Ca2+, Sr2+, Ba2+
  • pH range: 2–7 (no pH compensation)
  • Temperature range: 0–40°C (no temperature compensation)
  • Electrode slope: 55 ±3 mV/decade at 25°C
  • Electrode resistance: 0.1 to 5 MΩ
  • Minimum sample size: must be submerged 2.8 cm (1.1 in)
  • Connections:
    • Wireless: Bluetooth
    • Wired: USB

Compatibility Requirements

  • LabQuest 2
    LabQuest 2

    Full Support

    The Go Direct® Ammonium Ion-Selective Electrode is fully supported with LabQuest 2 (version 2.8.3), a standalone data logger with built-in graphing and analysis software.

    Learn more about LabQuest 2 »

    Compatibility Notes

    1. Wireless connection of this sensor to a LabQuest 2 requires a Go Wireless USB Radio when used with some older LabQuest 2 models.
  • Computers
    Computers

    Software
    InterfaceGraphical Analysis 4 for ComputersVersion 4.4
    No interface requiredFull support 1
    LabQuest 2Full support 2 3

    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.
    2. Connect this sensor directly to a computer or Chromebook via a USB or wireless Bluetooth® connection for best results. Alternatively, this sensor is fully supported when used with LabQuest 2 when LabQuest 2 is connected to a computer or Chromebook via Wireless Data Sharing.
    3. Wireless connection of this sensor to a LabQuest 2 requires a Go Wireless USB Radio when used with some older LabQuest 2 models.
  • Chromebook
    Chromebook

    Software
    InterfaceGraphical Analysis 4 for ChromeVersion 4.4
    No interface requiredFull support
    LabQuest 2Full support 1 2

    Compatibility Notes

    1. Connect this sensor directly to a computer or Chromebook via a USB or wireless Bluetooth® connection for best results. Alternatively, this sensor is fully supported when used with LabQuest 2 when LabQuest 2 is connected to a computer or Chromebook via Wireless Data Sharing.
    2. Wireless connection of this sensor to a LabQuest 2 requires a Go Wireless USB Radio when used with some older LabQuest 2 models.
  • Android
    Android

    Software
    InterfaceGraphical Analysis 4 for AndroidVersion 4.4Graphical Analysis GW for AndroidVersion 3.2
    No interface requiredFull supportIncompatible
    LabQuest 2Full support 1 2 3Full support 2 3

    Compatibility Notes

    1. Connect this sensor directly to a supported mobile device via a wireless Bluetooth® connection for best results.
    2. Mobile devices can only connect to LabQuest 2 via Wireless Data Sharing.
    3. Wireless connection of this sensor to a LabQuest 2 requires a Go Wireless USB Radio when used with some older LabQuest 2 models.
  • iOS
    iOS

    Software
    InterfaceGraphical Analysis 4 for iOSVersion 4.0.3
    No interface requiredFull support
    LabQuest 2Full support 1 2 3

    Compatibility Notes

    1. Connect this sensor directly to a supported mobile device via a wireless Bluetooth® connection for best results.
    2. Mobile devices can only connect to LabQuest 2 via Wireless Data Sharing.
    3. Wireless connection of this sensor to a LabQuest 2 requires a Go Wireless USB Radio when used with some older LabQuest 2 models.

What’s Included

  • Go Direct ISE Amplifier attached to a Go Direct Ammonium Ion-Selective Electrode BNC
  • Micro USB cable
  • 30 mL bottle of High Standard solution with SDS (100 mg/L NH4+ as N)
  • 30 mL bottle of Low Standard solution with SDS (1 mg/L NH4+ as N)
  • Short-Term ISE Soaking Bottle
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