The Potassium Ion-Selective Electrode is fully supported with LabQuest 2, a standalone data logger with built-in graphing and analysis software.
Learn more about LabQuest 2 »
Product Description
£259.00 ex VAT | £310.80 Inc VAT
The Potassium Ion-Selective Electrode makes the measure of potassium ions portable. When used with a Vernier LabQuest 2, the Potassium ISE can be used to take readings in the field at lakes or streams. This sensor is easier to set up and use than other methods of measuring potassium ion concentration in aqueous solutions. Because it is a stick-style sensor, its use is similar to using a conductivity probe or a pH sensor in a laboratory setting or in the field.
Ion-Selective Electrodes require good chemical technique and careful calibration to obtain accurate results. They are not recommended for middle school or elementary students.
We recommend that you do not purchase Potassium Ion-Selective Electrode replacement modules too far in advance of their expected time of use; degradation occurs while replacement modules are stored on the shelf.
Available to Order
Email to a friendExperiments
Experiments Include:-
Measuring Potassium in Commercial Products
Measuring Potassium in Foods
What's Included
- Vernier Potassium Ion-Selective Electrode
- 30 mL bottle of High Standard Standard (1000 mg/L)
- 30 mL bottle of Low Standard Standard (10 mg/L)
- ISE soaking bottle (empty bottle with insertion cap)
- User manual
Specification
- Range: 90 – 39,000 mg/L (or parts per million)
- pH Range: 2 to 12
- Interfering Ions: Rb2+, Cs2+, NH4+, Ca2+, Mg2+, Li+
- Temperature Range: 0 – 40°C (not compensated)
- Electrode Resistance: >50 mΩ
- Electrode Slope: 56 +/- 4 mV/decade at 25°C
- Calibration Voltage (typical): 2.7 V (1000 ppm), 1.9 V (10 ppm)
- Reproducibility (precision): +/- 11% of full scale
- Minimum sample size: 3 mL in a 50 mL beaker
- Accuracy: +/- 16% of full scale
Sensor Requirements
The Potassium Ion-Selective Electrode may require a compatible interface and software. Choose a platform below to see compatible interface and software options.
| Software | ||
|---|---|---|
| Interface | Logger Pro | Logger Lite |
| LabQuest Mini | Full support | Full support |
| LabQuest 2 | Full support | Full support |
| LabQuest Stream | Full support1 | Full support1 |
| Go!Link | Full support | Full support |
| Go Wireless® Link | Future support2 | Future support2 |
| Original LabQuest (DISCONTINUED) | Full support | Full support |
| LabPro (DISCONTINUED) | Full support | Full support |
COMPATIBILITY NOTES
- Connect LabQuest Stream via USB. Future software updates will support connection via Bluetooth®technology
- A computer with a compatible Bluetooth® 4.0 radio is required. Only computers running Windows 10 or Mac OS X 10.10 or newer are supported.
| Interface | Software Graphical Analysis for Chrome |
|---|---|
| LabQuest Mini | Full support |
| LabQuest 2 | Full support |
| LabQuest Stream | Full support1 |
| Go!Link | Full support |
| Original LabQuest (DISCONTINUED) | Full support |
COMPATIBILITY NOTES
- Connect LabQuest Stream via USB. Future software updates will support connection via Bluetooth®technology
| Software | ||
|---|---|---|
| Interface | Graphical Analysis for iOS | Graphical Analysis for Android |
| LabQuest Stream | Future support | Future support |
| LabQuest 2 | Full support1 | Full support1 |
| Go Wireless Link | Future support | Future support |
COMPATIBILITY NOTES
- Mobile devices can only connect to LabQuest 2 via Wireless Data Sharing.
Ideal Solutions for Enquiry Based Learning
5 Year Warranty on most items
Award Winning Products
Connectivity with iOS, Mac, Android, Windows and Chromebooks
Guaranteed Quality and Support
Extensive Support Materials
Related Products
Use the Drop Counter to perform accurate, automatic titrations. Record the number of drops or calibrate the drop size to record volume of titrant added during a titration. Logger Pro software can automatically convert the number of drops into volume. The Drop Counter can be used for conductimetric or potentiometric titrations using our Conductivity Probe, Ion-Selective Electrodes or any electrode with a 0 to 5 volt output.
£129.00 ex VAT | £154.80 Inc VAT
Add to basket 
This sensor can be used in a wide range of tests and experiments. It can be used to determine the rate of ethanol production during fermentation and can also be used to measure the discrete amount of ethanol in a given sample.
£155.00 ex VAT | £186.00 Inc VAT
Add to basket 
This sensor is used to measure voltages in the range of -30 to +30 volts
£64.00 ex VAT | £76.80 Inc VAT
Add to basket 
Use the Dual-Range Force Sensor in a wide variety of experiments including the study of friction, simple harmonic motion, impact in collisions, or centripetal force. The Dual-Range Force Sensor has two ranges: ±10N or ±50N. It can be easily mounted on a Vernier Dynamics Cart for use with the Vernier Dynamics System. Mount one on the New Centripetal Force Apparatus, on a ring stand or even as a replacement for a hand-held spring scale.
Use it to study friction, simple harmonic motion, impact in collisions, or centripetal force.
£142.00 ex VAT | £170.40 Inc VAT
Add to basket 
Ideal for most acceleration experiments. Use it for studying the one-dimensional motion of a car (real and toy), lift, pendulum bob, or amusement park ride.
£116.00 ex VAT | £139.20 Inc VAT
Add to basket - Range: -50 to +50 m/s2
- Typical accuracy: ±0.1 m/s
The Flow Rate Sensor can be used for environmental or Earth science studies. Flow rate data can be used to calculate the discharge value for a stream or determine the sediment transport of a stream. The Flow Rate Sensor includes 3 riser rods, which enable the impeller to be placed at fixed depths, and is equipped with a 5 m cable so your data-collection equipment can stay on shore. The Flow Rate Sensor also separates into four sections for easy transport and convenient storage.
£168.00 ex VAT | £201.60 Inc VAT
Add to basket 
The Vernier Energy Sensor offers an easy way to quantify voltage, current, power, and energy output of small wind turbines and solar panels such as those used in our KidWind Experiment Kits. Simply connect a source such as a small wind turbine or solar panel to one side and a load such as the Variable Load or a resistor on the Vernier Resistor Board to the other side.
The Energy Sensor measures the current and voltage of the system. Data-collection and analysis software, such as Logger Pro or LabQuest App can then calculate the power and energy output.
£114.00 ex VAT | £136.80 Inc VAT
Add to basket 
The Instrumentation Amplifier monitors voltages from 20 mV to 1 V (DC or AC). It has several switch settings to allow you to select the best gain and includes auto-ID functionality for each of the six ranges. Input bandwidth of 10 kHz allows the capture of higher frequency signals. It is typically used to amplify the chart recorder or analog output of any instrument, such as a third-party gas chromatograph.
£103.00 ex VAT | £123.60 Inc VAT
Add to basket 
The Differential Voltage Probe is designed for exploring the basic principles of electricity. Use this probe to measure voltages in low voltage AC and DC circuits.
£51.00 ex VAT | £61.20 Inc VAT
Add to basket 
Designed for much higher forces than the Dual-Range Force Sensor, the Force Plate can measure the forces developed during stepping, jumping, and other human-scale actions. For example, you can perform the following kinds of experiments:
£376.00 ex VAT | £451.20 Inc VAT
Add to basket - Observe the change in normal force during a ride in a lift.
- Measure the impulse delivered by the floor during a jump.
- Measure the reaction force as a student leans against a wall.
The Goniometer measures the angle of a joint, such as the knee or elbow. Use it to analyze the range of motion of a limb during different types of physical activity.
£207.00 ex VAT | £248.40 Inc VAT
Add to basket 
Use the High Current Sensor in experiments that involve currents larger than 1 A, such as solar panels, hand generators, and other alternative energy projects.
The High Current Sensor has a range of ±10 A. Current is measured with a Hall Effect sensor, which uses the magnetic field created by the current and therefore does not add a resistive element to the circuit. A metal shield over the Hall Effect chip reduces the influence of external magnets. A replaceable fuse protects the equipment and circuit
£103.00 ex VAT | £123.60 Inc VAT
Add to basket 
The Mini GC Plus is a portable instrument for separating, analyzing, and identifying substances contained in a volatile liquid or gaseous sample.
The Mini GC uses Air as its carrier gas so no external gas cylinders required.
£2,719.00 ex VAT | £3,262.80 Inc VAT
Add to basket 
The Colorimeter is great for Beer's law experiments, determining the concentration of unknown solutions, or studying changes in concentration vs. time.
This 4-wavelength Colorimeter measures the amount of light transmitted through a sample at a user-selectable wavelength in order to determine the concentration of a solution. Features such as automatic sensor identification and one-step calibration make this sensor easy to use. Fifteen 3.5 mL cuvettes are included. A package of 100 replacement cuvettes (with 20 lids) is available please click here
£155.00 ex VAT | £186.00 Inc VAT
Add to basket