A.KRÜSS Optronic Brochure Density Meters
A.KRÜSS Optronic Brochure Density Meters, English PDF document.
View resource →Product overview
Semi-automatic models draw samples through an external pump and can connect to a drying unit, increasing filling efficiency while retaining flexible sample changes.
Models and core specifications
| Model | Sample supply | Density accuracy | Resolution |
|---|---|---|---|
| DS7700-SA | Semi-automatic pump | ±0.001 g/cm³ | 0.001 g/cm³ |
| DS7800-SA | Semi-automatic pump | ±0.0001 g/cm³ | 0.0001 g/cm³ |
Advantages
Sample supply, cleaning and drying
- Peristaltic-pump filling and cleaning for low- to slightly viscous samples; manual supply is also supported.
- DS7060 drying unit with a 3/2-way valve allows cleaning and drying without reconnecting hoses.
Oscillating U-tube and measuring scales
- Oscillating U-tube method with borosilicate-glass and PTFE sample-contact parts; minimum measuring-cell sample volume 0.9 ml.
- Pre-installed density, relative density, Brix, alcohol volume fraction and sulphuric-acid mass-fraction scales; unlimited user-defined scales.
- DS7700 and DS7800 density accuracy / resolution grades are 0.001 and 0.0001 g/cm³ respectively.
Sample temperature control and adjustment
- Integrated Peltier control: 10–40 °C, control accuracy ±0.01 °C; temperature measurement accuracy ±0.02 °C and resolution 0.01 °C.
- Automatic menu-guided adjustment with an air-pressure sensor and temperature-controlled calibration media; measured-value stabilisation and pressure display.
- The three-second period applies after temperature equalisation, not to the entire filling, cleaning and drying cycle.
Operation and data integrity
- 7.0-inch, 800 × 480 capacitive touchscreen with six interface languages; keyboard, mouse and barcode-scanner support.
- More than 10,000 methods, user management and audit trail.
- USB, RS-232 and Ethernet with LIMS integration; data-management functions support 21 CFR Part 11 requirements.
Technical data
| Item | Specification |
|---|---|
| Measurement range | 0–3 g/cm³ |
| Temperature-control range | 10–40 °C |
| Temperature-control accuracy | ±0.01 °C |
| Measurement period | 3 s after temperature equalisation |
| Minimum measuring-cell sample volume | 0.9 ml |
| Pressure range (relative) | 0–9 bar |
| Temperature-measurement accuracy | ±0.02 °C |
| Temperature-measurement resolution | 0.01 °C |
| Scales | Density, relative density, Brix, alcohol (vol.%), sulphuric acid (mass%), unlimited user-defined scales |
| Method capacity | More than 10,000 |
| Adjustment | Automatic, menu-guided; air-pressure sensor and temperature-controlled calibration media |
| Sample-contact materials | Borosilicate glass, PTFE |
| Additional functions | Audit trail, user management, measured-value stabilisation, air-pressure display |
| Operation and display | 7.0-inch capacitive touchscreen, 800 × 480 pixels; keyboard, mouse, barcode scanner |
| Physical interfaces | 1 × USB；1 × RS-232；1 × Ethernet |
| System integration | LIMS |
| Dimensions (W × H × D) | 220 × 220 × 430 mm |
| Instrument weight | 5.3 kg |
| Operating voltage / frequency | 100–240 V; 47–63 Hz |
| Measuring / maximum power | 25 W / 120 W |
Density accuracy is specified at 20 °C, 1013 hPa and 50% relative humidity. 0.9 ml is the measuring-cell minimum; total sample requirements also depend on tubing and sample-supply configuration.
Application areas
For medium-throughput quality control in pharmaceutical, chemical, petrochemical, food and beverage laboratories.
Calibration standards
Certified isooctane, n-nonane, ultrapure-water and dichlorotoluene density standards are available separately. Use the temperature and reference density stated on the relevant certificate.
Related accessories and consumables
Pump and autosampler options can be chosen for the workflow. AS80 provides 18 or 36 positions; AS90 provides 53 or 89. Replacement consumables include TPE pump tubing, PTFE connectors and adaptors. Protective cover, CBM910 printer and print consumables are available separately.
Service support
- Experienced specialists provide product selection, application and operation support.
- Calibration, maintenance and maintenance contracts can be discussed as required.
Selection guidance
The models differ mainly in density accuracy and resolution. Select by daily sample count, cleaning/drying workflow and quality-system requirements.