HORIBA LAQUAtwin pH Meter pH-11

HORIBA LAQUAtwin pH Meter pH-11


Accurate pH measurements in a few seconds, from a single drop.

Water pH varies in different environments, and a slight change can often have a major effect.

Whether you need to keep the pH of an aquarium within tight limits, are checking for the acidity of rain water or for the quality of meat and fish products, LAQUAtwin compact pH meters are ideal for you. No matter where and when you need to test.

Applications include: Fresh water testing (rain, rivers, lakes, hot springs); aquaria; drainage treatment solutions; soil testing for improved agriculture; fermentation and brewing; food freshness testing; research laboratories; QC of medical supplies and cosmetics; preventative dentistry; school education, etc.

Accessories included: 2 CR2032 batteries, 1 Pipette, 14 mL Standard solutions (pH 4 & pH 7).

Model pH-11 pH-11
(US only)
Measurement principle Glass electrode method
Minimum sample volume 0.1 mL (0.05 mL with sampling sheet B)
Measurement range pH / mV 0 to 14 pH / ± 650 mV
Display range 0 to 14 pH
Range and Resolution 0.1 pH 0.1/0.01 pH
Calibration Two point Three point Five point
Accuracy ±0.1 pH ± 0.01 pH
Functions Temperature compensation • IP67 Water/Dust proof • Auto hold • Automatic power off (30 minutes)
Display Custom (monochrome) digital LCD
Operating temperature/ humidity 5 to 40°C, 85% or less in relative humidity (no condensation)
Power CR2032 batteries (x2)
Battery life Approx. 400 hours in continuous use
Main Material ABS epoxy
Dimensions / Mass 164 mm × 29 mm × 20 mm (excluding projections) / Approx. 50 g (meter only, without batteries) 


Drop a sample with a pipette; small volumes as 0.1 mL can be measured. Using sampling sheet B, volumes down to 0.05 mL can be tested.


When you're in the lab, you can test the sample in a beaker. Ensure the sensor guard sliding cap is open.


Use as a scoop to test water from a river. Vertical scoop is available with a unique sensor guard.


The sampling sheet allows tiny, trace volumes to be analysed. For example, wipe off the surface of the skin with a sampling sheet soaked with pure water and measure.

Solid samples

Foods containing some moisture can be tested by placing a small piece directly onto the sensor.


LAQUAtwin meters can also test dry powders. Simply place the powder sample onto the sensor, and add an appropriate amount of pure water.

Paper, textiles and films

To test sheets of paper and textiles, cut up the sample into small pieces and place them directly onto the sensor then add a defined amount of pure water.


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