Salinity-Portable Conductivity meter F-70/DS-70 Series


Smart Navigation

Intuitive and very easy to use touch panel operation.


Select electrodes according to purpose.


Our pH electrodes have a broad line-up according to sample, container and application type.

Selection Guide

Helping you to pick the perfect LAQUA.

Salinity meters


Download Datasheet


Salinity-Portable Conductivity meter D-70/ES-70 Series

pH, mV(ORP), ION, DO, Conductivity , Resistivity, Salinity, TDS

In the lab, in the field or anywhere you need it

Designed for use with one hand and with an IP67 waterproof rating and shock-resistant casing, this meter can be used for long periods, even in dark places, making it ideal  for field measurements in rivers and lakes.

Various functions

Backlit LCD, 2-channel measurement, Waterproof and dustproof (IP67 rated) , PC connection compatible, Printer output compatible (printer sold separately), Security function, Shock and chemical resistant body case

For details, see the specifications.

Download Datasheet

LAQUAtwin B-721


The only pocket meter that directly measures sodium ion concentration in 0.3ml sample (or 0.05ml sample with sampling sheet B) and converts it into salinity or NaCl salt concentration. No need for a beaker to calibrate the meter or measure a sample. Just place few drops of the standard or sample onto the sensor. This procedure saves you time and prevents wasting your precious sample. 

  • Minimum sample volume: 0.3ml (0.05ml with sampling sheet B) 
  • Salinity, mV, and temperature display
  • Up to 2 calibration points
  • Auto calibration
  • Auto standard recognition: 0.5 & 5.0% NaCl (default)
  • Changeable high calibration value
  • Auto stable / auto hold measurement
  • Auto power off: 30mins.
  • Low battery indicator
  • IP67 Rating dust & waterproof
  • Replaceable sensor
  • 400 Hours battery life: continuous use
  • Material: ABS epoxy
  • Display: custom (monochrome) digital LCD
  • Operating conditions: 5 to 40 ºC, 85% or less relative humidity
  • Warranty: 2 years - meter, 6 months - sensor
  • Packed in handy carrying case
  • Supplied with 0.5% & 5.0% NaCl standards (14ml each), 5 x sampling sheets B, 2 x CR2032 batteries, dropper, instruction and quick manuals




Measurement Principle

Ion Selective Electrode

Minimum Sample Volume

0.3ml (0.05ml with sampling sheet B)

Salinity Range

0.1 to 10% by weight

Display Range

0.0 to 25% by weight


0.00 to 0.99%: 0.01%

1.0 to 9.9%: 0.1%

10 to 25%: 1%

Calibration Points

Up to 2


±10% of reading value

Temperature Display

0 to 50.0 ºC


Custom (monochrome) digital LCD

Operating Temperature

5 to 40.0 ºC

Operating Humidity

85% or less relative humidity (no condensation)


CR2032 batteries (2)

Battery Life

Approx. 400 hours in continuous use


ABS epoxy


164 x 29 x 20 mm (excluding projections)


Approx. 55 g (including sensor and batteries)


  • Auto Calibration
  • Auto Standard Recognition
  • Changeable High Calibration Value
  • Auto Stable / Auto Hold Measurement
  • Automatic Power Off (30mins)
  • Low Battery Indicator
  • IP67 Dust / Waterproof
  • Replaceable Sensor