KNAUEROsmometers & Osmolality Solutions
Knauer is one of the pioneers in the field of osmometry and is known for its reliable and user-friendly instruments. Contact a member of the Verulam Scientific team using the link below to place an order today.
Specialist Osmometer Instruments
Our freezing point osmometer K-7400S allows the easy and fast determination of the osmolality of various aqueous solutions. Also, the freezing point depression of the samples can be read. The proven technology of freezing point determination in combination with the robust and intelligent design of the device allows 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.
Cutting-Edge Technology
Our freezing point osmometer K-7400S 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. The data can also be exported into various file formats for archival storage.
Measurement Specifications
The measurement specifications of the KNAUER Semi-Micro Osmometer K-7400S comply with the requirements of the European Pharmacopoeia for osmolality (Ph. Eur. 2.2.35, 10/2021) in the pharmaceutically relevant range of 0-400 mOsmol/kg.
If you have any questions about our osmometer instruments, be sure to take a look at our technical brochure below, or reach out with any questions.
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 freely selectable osmolality) optional: Three-point calibration (0 Osmol/kg and two freely selectable osmolalities) |
General
| 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) |
Communication
| Interfaces | RS-232 port |
|---|---|
| Control | Keypad (LED display, 2 rows with 24 characters) optional: EuroOsmo7400 Software |
What Our Customers Say
At Verulam Scientific, we pride ourselves on our ability to consistently deliver precision instruments with care and attention to our clients. We stock a wide range of instruments from trusted manufacturers. Learn more about the quality of our service by reading some of our reviews using the link below.
Contact Us
If you would like further information on the Knauer Osmometry, please fill in the form below and one of the team will be in touch.
How Accurate and Reliable Are KNAUER Osmometers for Measuring Osmolality?
The Knauer K-7400S osmometer is extremely reliable, and can determine the exact freezing point of aqueous solutions to high degrees of accuracy. The thermistor has a resolution of 1/1000 K, so that even the slightest change in temperature is registered.
What Industries Typically Use KNAUER Osmometers?
Using a reliable and accurate osmometer such as the Knauer K-7400S provides the optimal solution for osmolality measurement in chemistry, biology, and pharmaceutical applications.
How Do You Maintain a KNAUER Osmometer?
To maintain the Knauer K-7400S, you will need to clean the stirring wire and the thermistor. It is vital to wear safety gloves during cleaning to prevent injury and infection. You can also perform functioning checks of the osmometer’s cooling capacity by measuring the temperature in the cooling cavity. For more information regarding maintenance and cleaning of the Knauer K-7400S, be sure to take a look at the comprehensive product brochure.
What Sample Types Can Be Analysed Using KNAUER Osmometers?
A Knauer K-7400S is able to analyse a wide range of sample types, such as:
- Rinsing solutions
- Pharmaceutical solutions
- Eye drops
- Soft drinks
- Isotonic drinks
- Alcoholic beers
- Biological fluids
Contact the Verulam Scientific team today to learn more about suitable samples for a Knauer Osmometer.
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