A.KRÜSS Optronic Brochure Density Meters
A.KRÜSS Optronic Brochure Density Meters, English PDF document.
View resource →Product overview
Fully automatic models combine the density meter with an AS80/AS90 autosampler and DS7070 peristaltic pump for continuous filling, measurement, cleaning and drying of up to 89 samples.
Models and core specifications
| Model | Automatic supply | Density accuracy | Resolution |
|---|---|---|---|
| DS7700-A | AS80/AS90 + DS7070 | ±0.001 g/cm³ | 0.001 g/cm³ |
| DS7800-A | AS80/AS90 + DS7070 | ±0.0001 g/cm³ | 0.0001 g/cm³ |
Advantages
Sample supply, cleaning and drying
- AS80 or AS90 autosampler with DS7070 peristaltic pump automates filling, cleaning and drying for up to 89 samples.
- Configure measurement methods, cleaning sequences and sampler templates; semi-automatic and manual filling remain available.
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 high-throughput pharmaceutical, chemical, petrochemical, food/beverage and central quality-control 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
The automatic set includes the selected AS80/AS90 autosampler and DS7070 peristaltic pump. 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. Also confirm AS80/AS90 and DS7070 configuration against rack capacity, viscosity, cleaning liquid and drying workflow.