Contact us
print page
Article No.: A0006AC
Articlename: K-7400S Semi-Micro Osmometer

Semi-Micro Osmometer

Freezing point osmometer

KNAUER is one of the pioneers in the field of osmometry and known for its reliable and user friendly instruments for many decades. Our newest freezing point Osmometer K-7400S allows the easy and fast determination of the osmolality of various aqueous solutions. In addition, the freezing point depression of such samples can be measured. The proven technology of freezing point determination in combination with the robust and intelligent design of the device allows fast and reproducible measurements. The instrument is equipped with a peltier cooler and an integrated microprocessor controlling the automated measurement. The freezing point Osmometer is a standalone device that optionally can be equipped with a printer. Furthermore, the device can be controlled via the EuroOsmo 7400 software. The software automatically plots the temperature curve for each measurement and calibration and allows saving of the measured values. In addition, the data can optionally be exported into various file formats for archival storage.

The K-7400S Semi-Micro Osmometer complies with the European Pharmacopoeia for osmolality (2.2.35, 01/2012).



More information about osmometry here

Key Features

Technical Data

Technical parameters

Sample volume 50 - 150 µl
Osmolality range 0 - 2000 mOsmol/kg
Resolution osmolality: integer value without decimal part, e.g. 850 mOsmol
temperature: value with three digits, e.g. -1.576 °C
Test time ~ 2 min
Precision SD ≤ 4 mOsmol/kg [0 — 400 mOsmol/kg]
RSD ≤ 1 % [400 — 2000 mOsmol/kg]
Linearity ± 1 % [0 -1500 mOsmol/kg]
± 1.5 % [0 - 2000 mOsmol/kg]
Calibration Two-point Calibration (0 mOsmol/kg and one free selectable osmolality)
optional: Three-point Calibration (0 Osmol/kg and two free selectable osmolalities)


Power supply 100 – 240 V, 50 – 60 Hz, 70 W
Dimensions 160 x 182 x 340 mm (W xH x D)
Weight 5.3 kg
Ambient conditions Temperature range: 10–35 °C
Rel. humidity: 20–80 % (non-condensing)


Interfaces RS-232 port
Control Keypad (LED display, 2 rows with 24 characters)
optional: EuroOsmo7400 Software

Documents and more information

Do you need more details or a quote?

We are happy to help you

Technical data are subject to change without notice.
All trade names and registered trademarks are the property of their respective owners.

Follow us