Compact Potassium Ion Testing for Growers

The Horiba LAQUAtwin B-731 is a compact potassium ion meter that uses an ion-selective membrane to measure potassium in aqueous samples. It supports on-site testing workflows where growers need potassium-specific measurements rather than a general conductivity reading.

Grower Applications

• Plant sap testing: Measure potassium ions in appropriately prepared sap samples as part of a crop-monitoring routine.
• Soil-testing workflows: Use an appropriate aqueous sample preparation method; this is not a probe for direct measurement in dry soil.
• Cultivation management: Use potassium measurements alongside other testing and crop observations when evaluating nutrition.

Product Details

• Manufacturer: Horiba.
• Series: LAQUAtwin.
• Model: B-731.
• Measured ion: Potassium.
• Measurement method: Ion-selective membrane.
• Sample type: Aqueous samples.

Measurement Limitations

Non-target ions can affect ion measurements. Sample preparation and calibration matter when comparing results, so follow the manufacturer's instructions for the sample type being tested. The meter detects ions in water; it does not measure electrolytes in oils.

A potassium reading is not a complete nutrient analysis. Use an appropriate testing method and crop-specific interpretation before making fertilizer adjustments.