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GD90 Fully Automatic Liquid Density Meter

The GD90 Fully Automatic Liquid Density Meter delivers precise and stable density measurements with one-touch operation, combining advanced Peltier temperature control and HD video technology for bubble-free analysis. Ideal for chemical, pharmaceutical, and food industries, it ensures compliance with 21 CFR Part 11 and pharmacopoeia standards.

- One-touch automated measurement with integrated Peltier temperature control
- High-definition video eliminates air bubble interference for accurate results
- Direct data printing and electronic signature compliance (21 CFR Part 11)
- Measures density, alcohol concentration, and custom formulas with U-tube oscillation method
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  • GD90

  • Zhuoguang Instrument

The GD90 Fully Automatic Liquid Density Meter is an advanced analytical instrument engineered to deliver highly accurate and reliable density measurements for complex fluid analysis. By utilizing the proven U-tube oscillation method seamlessly integrated with Peltier precision temperature control technology, this device ensures exceptional thermal stability and testing precision. Designed to meet the rigorous demands of modern laboratories, quality control centers, and industrial research facilities, the GD90 significantly optimizes testing workflows.

A standout capability of this instrument is its high-definition video monitoring system. This feature allows operators to visually confirm the complete absence of microscopic air bubbles within the sample during testing—a critical factor in preventing measurement discrepancies. Powered by advanced pulse excitation and high-precision detection technology, the GD90 enables users to quickly, efficiently, and accurately determine sample density, alcohol concentration, and other vital density-related parameters with absolute confidence.

Features

1. Automated One-Touch Measurement

The system features a highly automated integration that enables one-touch measurement. This fully automated injection and testing process minimizes manual sample handling, reduces the risk of human error, and significantly increases laboratory throughput. The instrument is also compatible with manual injection, providing the flexibility needed for various specialized testing requirements.

2. Peltier Precision Temperature Control

Temperature fluctuations can severely impact density readings. The GD90 incorporates built-in Peltier temperature control technology to provide rapid, highly stable, and precise thermal regulation. By maintaining strict temperature environments throughout the measurement process, the instrument drastically improves the accuracy, repeatability, and reliability of the final data.

3. High-Definition Video Bubble Detection

Undetected air bubbles are a primary source of error in liquid density measurement. The integrated high-definition video system offers real-time visual monitoring of the U-tube. This eliminates air bubble artifacts by allowing users to verify that the sample is completely bubble-free before and during the analysis, ensuring flawless data integrity.

4. 21 CFR Part 11 Compliance & Advanced Data Security

Engineered to meet stringent regulatory standards, the GD90 is fully compliant with 21 CFR Part 11 and major pharmacopoeias. It features a robust four-level user permission management system, comprehensive audit trails, and support for handwritten electronic signatures. Additionally, exported files are secured with high-level MD5 verification protection, making it an ideal choice for the highly regulated pharmaceutical industry.

5. Seamless Data Management and Direct Output

Equipped with a massive 128GB internal storage capacity and an intuitive 10.4-inch color touchscreen, managing large volumes of test data is effortless. Measurement results can be exported in multiple formats (PDF and Excel) and can be directly printed using compatible wireless laser or dot matrix printers for immediate documentation and analysis.

Applications

Density meters play an indispensable role in ensuring product quality, consistency, and compliance across a wide range of demanding industries. The GD90 is an essential analytical instrument for testing and researching various liquid samples in the following sectors:

  • Pharmaceutical Industry: Essential for verifying the concentration, purity, and consistency of liquid medications, active pharmaceutical ingredients (APIs), and intravenous fluids, fully supported by its regulatory-compliant software.

  • Petrochemical & Chemical Sectors: Accurately measures the density of petroleum, refined fuels, lubricants, and complex chemical mixtures to confirm product grades and optimize refining processes.

  • Food & Beverage: Widely utilized for determining alcohol concentration, sugar content, and the precise consistency of liquid foods, beverages, and flavorings to maintain batch-to-batch uniformity.

  • Cosmetics & Daily Chemicals: Helps manufacturers monitor the formulation stability and quality of spices, essential oils, perfumes, and daily chemical products.

Key Technical Specifications

Fully Automatic Density Meter

Model

GD90

Test Modes

Density, Alcohol Concentration, and Custom Formulas

Measurement Range

0 g/cm³ to 3 g/cm³

Resolution

±0.00001 g/cm³

Repeatability

±0.00003 g/cm³

Accuracy

±0.00005 g/cm³

Injection Method

Fully Automatic (Manual Compatible)

Video Function

Yes/Real-Time Bubble Monitoring

Temperature Control

Peltier Temperature Control

Temperature Control Range

0°C-100°C

Temperature Contro

5°C-75°C

Temperature Resolution

0.01°C

*Concentration Formula Editor

Density coefficient vs. concentration calibration curve, automatic viscosity correction

Network

Wireless Wi-Fi

Display

10.4-inch FTF color touchscreen

Data Storage

128GB

Output

USB, RS232, RJ45, SD card, USB flash drive

User Management

Four-level permission management/freely configurable permissions

Audit Trail

Yes

Exported File verification with High-Level MD5 Protection

Yes

Multiple File Formats

PDF and Excel

Electronic Signature

Handwritten

*Graphical Analysis

Concentration curve scanning analysis, density coefficient and concentration calibration curve, and automatic viscosity correction

*User Accounts

Enable and disable functions

Printer

Compatible with wireless laser printers and dot matrix printers

Drying Function

Built-in dry air pump automatically dries sample tubes after each cleaning cycle

Dimension

480 mm x 320 mm x 200 mm (L x W x H)

Weight

8 kg

Power Supply

110V-230V 50Hz/60H

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