Horiba LAQUAtwin pH Meter


The pH value indicates the acidic or basic character of an aqueous solution. The higher the concentration of hydrogen ions in the solution, the lower the pH value.

A dilute aqueous solution with a pH value of less than 7 is considered acidic, with a pH value equal to 7 neutral, and with a pH value greater than 7 basic or even alkaline.


Application examples:

Soil pH for nutrient availability.

Soil pH is a measure of the acidity or alkalinity of the soil. On the pH scale, solutions with a pH of 7 are called "neutral solutions," less than 7 are called "acidic solutions," and greater than 7 are called "basic or alkaline solutions."

The optimum soil pH for healthy growth varies by plant. In general, however, most plants tolerate a soil pH of 6.0-7.5 because the majority of nutrients are available for uptake in this pH range.

In highly acidic soils, aluminum and manganese can become highly available and toxic to the plant, while the occurrence of calcium, phosphorus, and magnesium become lower.

Also, in highly alkaline soils, for example, the concentration of phosphorus and most other micronutrients are reduced.

Accordingly, depending on how the soil is planted, it is useful to know the plant's preferred pH and test the soil for it.

Soil pH can be determined by mixing a soil sample with water and placing the resulting aqueous solution on the sensor and measuring it within a few seconds.

The pH determination will indicate whether the soil is suitable for the plant being grown or may need to be adjusted for optimal plant growth.

pH of cement and concrete for flooring.

Fresh concrete is normally very alkaline and above the neutral point of pH 7. However, if the alkalinity in a concrete subfloor is too high, it can cause the flooring adhesive not to bond properly with the concrete subfloor.

Especially when laying floor tiles, for example, it is very important that the subfloor has a certain pH value in order to bond with the tile adhesive.

To quickly determine the correct pH of the concrete for installing the floor covering or its composite, the Horiba LAQUAtwin pH pocket meter can provide a quick, easy solution, saving time and money.

pH in plant tissue

To classify plant health, the pH value in plant tissue can be determined. At pH levels above 6.4, plants can become susceptible to insect attack, and at pH levels below 6.4, plants can become susceptible to other diseases.

Thus, the goal should be an optimum pH of 6.4 to allow for healthy plant growth. Laboratory analysis of tissue samples is helpful, but often does not provide results for several days or weeks.

Again, a quick alternative method for diagnosing plant health is offered by the LAQUAtwin pH meter.

A few drops of the plant juice of ripe leaves, which can be obtained by Horiba's juice press, are sufficient to determine the pH value.

The highly sensitive sensor determines the corresponding value in a short time.

Other areas of application include the food industry, the industrial production of paints and varnishes, and aquaristics for water quality analysis.

Since the sensor does not dry out, the Horiba Pockettester can be stored dry without any problems.

All Horiba LAQUAtwin pocket testers are dustproof and waterproof.

Application information


  • Minimum sample volume: 0.1 ml (0.05 ml with sampling form B).
  • pH-11: 2 calibration points, pH-, mV- display
  • pH-22: 3 calibration points, pH-, mV- display
  • pH-33: 5 calibration points, pH, mV and temperature display
  • Automatic calibration
  • Automatic buffer recognition: USA & NIST pH buffers
  • Automatic temperature compensation
  • Temperature calibration: 5 to 40.0 ºC
  • Automatic stability / auto hold measurement
  • Auto power off: 30 minutes
  • Low battery indicator
  • IP67 rating dust and waterproof
  • Replaceable sensor
  • 400 hours battery life: continuous operation without backlighting
  • Material: ABS epoxy resin
  • Display: custom (monochrome) LCD with backlighting
  • Operating conditions: 5 to 40 °C, 85% or less relative humidity
  • Warranty: 2 years - meter, 6 months - sensor
  • Packed in convenient carrying case
  • Supplied with pH 4.01 & 7.00 buffers (14ml each), 2 x CR2032 batteries, pipette, instruction manual and quick reference guide
Horiba LAQUAtwin pH Tester with 2 calibration points (pH-11)
Product number: 895650
Measuring range: 0.0 to 14.0 pH | Measurement parameters: pH
Manufacturer Part No. 3999960122 LAQUAtwin PH-11: The world's first pocket-sized PH meter  Your mobile laboratory - for use on site: Ideal for water quality testing in aquatic, drinking and process water and many other applications  HORIBA's unique compact meter integrates electrode, display and sample container to enable simple, effective on-site testing by direct measurement with a single drop.          Minimum sample volume: 0.1 ml (0.05 ml with sampling sheet B)        Up to 2 calibration points        pH and mV display        Automatic calibration        Automatic buffer recognition: USA & NIST pH buffers        Automatic temperature compensation        Automatic stable / automatic hold measurement        Automatic switch-off: 30 min.        Low battery indicator        IP67 rating dust and waterproof        Replaceable sensor        400 hours battery life: continuous operation without backlight        Material: ABS epoxy        Display: customised (monochrome) LCD with backlight        Operating conditions: 5 to 40°C, 85% or less relative humidity        Warranty: 2 years - meter; 6 months - sensor        Packed in a practical carrying case Supplied with pH 4.01 & 7.00 buffers (14ml each), 2 x CR2032 batteries, drops, instructions and short manual

€115.00*

Suitable HORIBA measuring instruments

Horiba LAQUAtwin pH Tester with 3 calibration points (pH-22)
Product number: 895651
Measuring range: 0.00 to 14.00 pH | Measurement parameters: pH
Manufacturer Part No. 3999960123 LAQUAtwin PH-22: The world's first pocket-sized PH meter Your mobile laboratory - for use on site: Ideal for water quality testing in aquatic, drinking and process water and many other applications. HORIBA's unique compact meter integrates electrode, display and sample container to enable simple, effective on-site testing by direct measurement with a single drop.           Minimum sample volume: 0.1 ml (0.05 ml with sampling sheet B)        Up to 3 calibration points        pH and mV display        Automatic calibration        Automatic buffer recognition: USA & NIST pH buffers        Automatic temperature compensation        Automatic stable / automatic hold measurement        Automatic switch-off: 30 min.        Low battery indicator        IP67 rating dust and waterproof        Replaceable sensor        400 hours battery life: continuous operation without backlight        Material: ABS epoxy        Display: customised (monochrome) LCD with backlight        Operating conditions: 5 to 40°C, 85% or less relative humidity        Warranty: 2 years - meter, 6 months - sensor        Packed in a practical carrying case Supplied with pH 4.01 & 7.00 buffers (14ml each), 2 x CR2032 batteries, drops, instructions and short manual

€140.00*
Horiba LAQUAtwin pH Tester with temperature measurement and 5 calibration points (pH-33)
Product number: 895652
Measuring range: 0.00 to 14.00 pH | 0 to 50.0 ºC | Measurement parameters: pH | Temperature
Manufacturer Part No. 3999960124 LAQUAtwin PH-33: The world's first pocket-sized PH meter Your mobile laboratory - for use on site: Ideal for water quality testing in aquatic, drinking and process water and many other applications. HORIBA's unique compact meter integrates electrode, display and sample container to enable simple, effective on-site testing by direct measurement with a single drop.         Minimum sample volume: 0.1 ml (0.05 ml with sampling sheet B)        Up to 5 calibration points        pH, mV and temperature display        Automatic calibration        Automatic buffer recognition: USA & NIST pH buffers        Automatic temperature compensation        Temperature calibration: 5 to 40.0 ºC        Automatic stable / automatic hold measurement        Automatic switch off: 30 min.        Low battery indicator        IP67 rating dust and waterproof        Replaceable sensor        400 hours battery life: continuous operation without backlight        Material: ABS epoxy        Display: customised (monochrome) LCD with backlight        Operating conditions: 5 to 40°C, 85% or less relative humidity        Warranty: 2 years - meter, 6 months - sensor        Packed in a practical carrying case Supplied with pH 4.01 & 7.00 buffers (14ml each), 2 x CR2032 batteries, dropper, instructions and quick reference guide

€168.00*
Horiba pH 4.01 Buffer Solution (514-4)
Product number: 895668
Measurement parameters: pH
Manufacturer Part No. 3999960108

€46.00*
Horiba pH 7.00 Buffer Solution (514-7)
Product number: 895669
Measurement parameters: pH
Manufacturer Part No. 3999960109

€45.00*