METTLER TOLEDO Densito 30PX Portable Digital Density Meter

Overview

The METTLER TOLEDO Densito 30PX is a high-precision portable digital density meter engineered for rapid, on-site density and specific gravity (SG) determination of liquid samples. It operates on the oscillating U-tube principle—a well-established, internationally standardized method for density measurement—where the resonant frequency of a precisely machined glass U-tube filled with sample correlates directly to its density. This physics-based approach ensures high reproducibility and minimal operator dependency. Designed for field and production environments where lab access is limited or impractical, the Densito 30PX eliminates the need for traditional volumetric methods such as pycnometers or hydrometers. Its compact, battery-powered architecture enables reliable operation in quality control labs, brewing facilities, electroplating lines, petroleum terminals, and food & beverage processing sites—without compromising metrological integrity.

Key Features

• Oscillating U-tube technology with temperature-controlled measurement cell for traceable, ISO 12185-compliant density results.
• Real-time temperature compensation: integrated Pt100 sensor measures sample temperature to ±0.1 °C; user-definable correction coefficients ensure accuracy across varying thermal conditions.
• Adaptive sampling control: adjustable aspiration speed minimizes bubble formation in high-viscosity or volatile samples—critical for syrups, battery acid, or ethanol-water mixtures.
• Full optical visibility of the measuring cell: transparent design allows immediate visual verification of cleanliness, absence of bubbles, and proper filling—reducing measurement errors at the source.
• Multi-parameter calculation engine: automatically derives alcohol content (% v/v), Brix (°Bx), Plato (°P), API gravity, Baumé, sulfuric acid concentration (w/w%), and custom-defined units from raw density input.
• Robust data management: stores up to 1100 fully annotated results—including sample ID, operator code, temperature correction factor, instrument serial number, date, and time—with GLP-compliant audit trail capability.

Sample Compatibility & Compliance

The Densito 30PX is optimized for homogeneous liquids and low-viscosity solutions (< 200 mPa·s). It supports direct measurement of aqueous solutions, hydrocarbon blends, alcoholic beverages, electrolytes, plating baths, and photographic developers. For viscous or degassing-prone samples, external syringe sampling (via optional adapter) ensures consistent fill without entrapped air. The instrument meets key international standards including ASTM D7777 (standard test method for density of petroleum products by digital density meter), ISO 12185 (crude oil and liquid petroleum products—determination of density by digital density meters), and USP (density and specific gravity). Its firmware architecture supports 21 CFR Part 11–ready data export when used with validated PC software and IR/RS232 interface hardware (P/N 51325006), enabling integration into regulated GMP/GLP workflows.

Software & Data Management

Built-in non-volatile memory retains all 1100 measurement records with full metadata. Results are exportable via infrared (IR) interface to PCs or printers using the included METTLER TOLEDO PC software suite. When paired with the optional IR/RS232 converter (51325006), the device supports wired serial communication for automated data capture into LIMS or ERP systems. All exported files include timestamps, user IDs, and instrument calibration status flags—essential for regulatory review. The software supports report generation compliant with internal QA protocols and external audit requirements, including electronic signature support and change-log tracking for critical parameters such as temperature correction factors.

Applications

• Replacement of classical pycnometers and hydrometers in routine QC laboratories.
• Determination of sulfuric acid concentration in lead-acid battery electrolytes (w/w%).
• Alcohol content analysis in wine, beer, and spirits per OIV and EU regulations.
• Brix, Plato, and °Baumé quantification in fruit juices, soft drinks, and malt extracts.
• API gravity and density verification of crude oil, diesel, and lubricants per ASTM D7777.
• In-process monitoring of electroplating bath composition and developer solution strength in photofinishing.

FAQ

What is the minimum sample volume required for measurement?
Approximately 1 mL is sufficient for complete U-tube filling and stable oscillation detection.

Can the Densito 30PX measure slurries or suspensions?
No—it is designed exclusively for clear, particle-free liquids. Suspended solids may obstruct the U-tube or distort oscillation frequency.

Is temperature calibration traceable to national standards?
Yes—the integrated Pt100 sensor is factory-calibrated against NIST-traceable references, and users may perform periodic verification using certified thermostats.

How often does the instrument require recalibration?
Calibration is recommended before each analytical session using two certified reference standards (e.g., air and water), especially after ambient temperature shifts exceeding 5 °C.

Does the device support multi-language UI?
Yes—interface language can be selected among English, German, French, Spanish, Italian, Chinese, Japanese, and Korean via system settings.