Kruss DS7800 Desktop Digital Density Meter
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | DS7800 |
| Pricing | Upon Request |
Overview
The Kruss DS7800 Desktop Digital Density Meter is a high-precision laboratory instrument engineered for accurate, repeatable density and specific gravity measurements across research, quality control, and production environments. It operates on the principle of oscillating U-tube densitometry: a precisely machined borosilicate glass U-tube is filled with the sample and set into controlled mechanical oscillation; the resulting resonant frequency is inversely proportional to the square root of the sample’s density. This fundamental physical relationship—governed by the Hooke–Newton equation for harmonic oscillation in fluid-filled capillaries—enables traceable, calibration-independent measurement performance when coupled with rigorous temperature control. The DS7800 integrates a high-stability Peltier-based thermostatic system capable of maintaining sample temperature within ±0.01 °C over extended measurement cycles, ensuring compliance with ISO 12084, ASTM D4052, and USP requirements for density determination in regulated industries.
Key Features
- Peltier-driven temperature control with active cooling/heating and real-time monitoring—no external chiller or bath required
- High-resolution capacitive touchscreen interface with intuitive menu navigation and six-language support (English, French, Italian, German, Portuguese, Spanish)
- Multi-interface connectivity: RS-232 serial, USB 2.0 (for direct PC communication and firmware updates), and Ethernet (supporting TCP/IP and optional integration into LIMS or MES via standard protocols)
- Internal memory stores the last 999 measurement records—including timestamp, temperature, density value, and user ID—with export capability via CSV or XML
- Integrated drying unit, peristaltic pump, calibrated transfer tubing, ten precision syringes (1–10 mL), stylus, and power cord—all supplied as standard equipment
- NIST-traceable calibration certificate provided with each instrument, documenting uncertainty values at multiple reference points (e.g., air, water, and certified density standards) in accordance with ISO/IEC 17025-accredited procedures
Sample Compatibility & Compliance
The DS7800 accommodates liquid samples ranging from low-viscosity solvents (e.g., ethanol, acetone) to moderately viscous formulations (up to ~250 mPa·s), including aqueous solutions, hydrocarbons, glycols, alcohols, acids, bases, emulsions, and suspensions. Sample introduction is fully automated via the integrated peristaltic pump or manually via syringe injection—both methods ensure bubble-free filling critical for metrological integrity. Instrument design conforms to IEC 61010-1 safety standards for laboratory electrical equipment. Data integrity meets FDA 21 CFR Part 11 requirements when operated with audit-trail-enabled software configurations, supporting GLP and GMP workflows in pharmaceutical, food & beverage, and chemical manufacturing settings.
Software & Data Management
Kruss provides proprietary DensityControl software (Windows-compatible) for advanced data visualization, statistical analysis (mean, SD, RSD, trend charts), and automated report generation compliant with internal SOPs or external regulatory templates. Raw measurement logs include full metadata: operator ID, environmental conditions (ambient temperature/humidity if logged externally), calibration history, and instrument firmware version. Export formats support seamless integration with enterprise systems—CSV for spreadsheet analysis, XML for structured database ingestion, and PDF for archival documentation. Optional remote monitoring and centralized fleet management are available through Kruss’ cloud-ready DensityConnect platform.
Applications
The DS7800 delivers critical analytical support across diverse industrial sectors: in pharmaceutical manufacturing, it verifies excipient concentration, monitors API solution density during crystallization, and validates cleaning-in-place (CIP) rinse efficacy; in petrochemical labs, it determines API gravity, fuel blending ratios, and distillation cut verification; in food & beverage QA, it quantifies sugar content (Brix), alcohol volume %, and syrup consistency; in cosmetics and personal care, it ensures batch-to-batch uniformity of surfactant blends and fragrance oils; in wastewater treatment, it aids in solids concentration estimation and sludge density profiling.
FAQ
What is the measurement range and typical accuracy of the DS7800?
The DS7800 measures densities from 0.000 g/cm³ to 3.000 g/cm³ with a repeatability of ≤0.00001 g/cm³ under controlled temperature conditions.
Does the instrument require periodic recalibration?
While factory calibration is NIST-traceable and stable over time, Kruss recommends annual verification using certified reference materials (e.g., water at 20 °C, air at ambient conditions) in accordance with ISO 17025 internal calibration procedures.
Can the DS7800 be validated for use in regulated environments?
Yes—the instrument supports IQ/OQ/PQ protocol execution, includes electronic signature capability, and generates full audit trails when paired with DensityControl software configured for 21 CFR Part 11 compliance.
Is automatic temperature compensation available for non-standard measurement temperatures?
Yes—DensityControl software applies polynomial correction models based on user-defined reference tables or built-in material-specific coefficients (e.g., for ethanol/water mixtures) to report density at standardized reference temperatures (e.g., 15.6 °C, 20 °C, or 25 °C).
How is sample contamination prevented between measurements?
The integrated drying unit evacuates residual solvent vapor post-measurement, while the peristaltic pump and disposable syringes minimize cross-contamination risk—validated cleaning protocols are included in the operational manual.
