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Horiba LAQUAtwin Compact Salt Meter Na-Based - B-721 | Delivery Only

SKU: OMTR20102
REG. PRICE: $599.95
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Compact meter to measure sodium ion to calculate into NaCl based salt concentration unlike the conductivity converted meters.

Flat sensor technology and 60 years of sensor engineering realizes a reliable and direct measurement of a drop of the sample from 0.3mL.Unique sensor mechanism realizes direct measurement of solid, viscous, powder samples. Use sampling sheet (sold separately) to measure down to 0.05mL.

No need for a beaker to calibrate or measure. Just drop the standards and sample on the flat sensor, saves you time and minimize wasting your precious sample.

Applications include:

  • Soil and sap testing for improved agriculture; food testing*

* Detection of ions in water only; electrolytes in oils cannot be measured. Ion measurement can be affected by non-target ions.


  • MODEL: B-721
  • Measurement principle: Ion electrode method
  • Minimum sample volume: 0.3mL or more*1
  • Measurement range: 0.1 to 10% by weight
  • Display range: 0.00 to 25% by weight*2
  • Range and Resolution (Valid numbers)
    • ①0.00 to 0.99 % : 0.01 % by weight
    • ②1.0 to 9.9 % : 0.1% by weight
    • ③10 to 25 % :1% by weight
  • Calibration: Two-point*3
  • Accuracy: ±10%(Reading value).*4
  • Functions
    • Auto range change
    • Temperature compensation
    • Waterproof*5
    • Reading locking
    • 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: 164mm × 29mm × 20mm (excluding projections) / Approx. 50 g (meter only, without batteries)
  • Accessories included: 2 CR2032 batteries/1 Pipette/Instruction manual/Quick manual/Storage case/Standard solution (0.5%、5%)(14mL)/5 pieces of Sampling sheet
  1. Smaller amount(0.05mL or more) can be measured with the sampling sheet B.  (Please close the light shield cover. If a sample that contain particulate, please use ”Sampling sheet holder” (sold separately))
  2. When the measured value is out of the measurement range, the displayed value blinks. It should be used only as a guide.
  3. Selectable between one-point and two-point calibrations. 
  4. Repeatability in measurement of a standard solution after calibration using the same standard solution.
  5. IP67:no failure when immersed in water at a depth of 1 meter for 30 minutes. But the product can not be used underwater.

In The Box

  • [1] x Horiba LAQUAtwin Compact Salt Meter Na-Based - B-721 | Delivery Only
  • Autocalibration function recognizes standards and is user-selectable for either one- or two-point calibrations. 
  • Auto range change
  • Temperature compensation
  • IP67 waterproof
  • Auto hold
  • Automatic power off (30 minutes)

1-Year Replacement

  • Warranty If the product is faulty within the warranty period, the product will be replaced with a new one.
  • Please send the product to the following address on the contact us page.