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ZG-MD90 Fully Automatic Liquid Density Meter with High Density Meter Measurement Accuracy

1. High density meter measurement accuracy, fast measurement speed, small sample volume;
2. Built-in injection pump, automatic sampling, cleaning and drying measuring pool;
3. High-definition video camera technology for conveniently and directly observing measuring pool;
4. Built-in drying air pump, each cleaning can automatically dry the sample tubes;
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Understanding the ZG-MD90


The ZG-MD90 Fully Automatic Liquid Density Meter is a revolutionary tool in liquid density measurement, redefining precision and efficiency for industries where accurate density data is non-negotiable. By integrating cutting-edge U-tube oscillation technology with intelligent temperature compensation, this instrument delivers consistent, reliable results for both Newtonian and non-Newtonian fluids. Designed to eliminate manual errors and streamline laboratory workflows, the ZG-MD90 is a top choice for compliance-driven applications, adhering to global standards such as ASTM D4052 and ISO 12185. Whether testing crude oil in refineries, liquid APIs in pharmaceutical labs, or spirits in breweries, this fully automatic densimeter combines ultra-high accuracy with hands-free operation, making it indispensable for quality control, research, and production processes.


Core Features


Ultra-High Measurement Precision

At the core of the ZG-MD90 is a quartz U-tube oscillator with ±0.001 Hz frequency stability, enabling density measurements with an accuracy of ±0.0001 g/cm³ and a resolution of 0.00001 g/cm³. The integrated Peltier temperature controller maintains sample temperatures between 5–65℃ with ±0.05℃ stability, eliminating thermal expansion errors that undermine data integrity. This level of precision ensures consistent results even for the most sensitive samples, setting a new benchmark for density measurement reliability.


Fully Automated Sample Handling

Equipped with a built-in injection pump, the ZG-MD90 automates sampling, rinsing, and drying of the measurement cell, requiring only 2–5 mL of sample. A barcode scanner reduces manual data entry errors by reading sample IDs and pre-configured method parameters, while the automatic cleaning function (compatible with manual operation) prevents cross-contamination. The built-in drying air pump ensures thorough drying of sample tubes after each cycle, minimizing downtime between measurements.


Multi-Parameter Analysis Capability

Beyond basic density measurement, the ZG-MD90 calculates relative density (API gravity), Baume degrees, and concentration via built-in conversion tables for common substances like sulfuric acid and ethanol. Users can create custom calculation formulas for proprietary mixtures, expanding its versatility across diverse applications. The 10-inch HD touch-screen display provides real-time access to key data, including density, temperature, and concentration, for intuitive monitoring.


Robust & Chemical-Resistant Design

Wetted components, including the pump diaphragm and oscillation tube, are crafted from PEEK and sapphire, ensuring compatibility with corrosive liquids such as concentrated acids, bases, and organic solvents. An automatic leak detection system shuts down the pump immediately to prevent damage, enhancing instrument longevity and laboratory safety.


Typical Uses


Petrochemical Industry

Refineries rely on the ZG-MD90 to measure the density of crude oil, gasoline, and lubricants, supporting custody transfer calculations and compliance with ASTM D4052 and ISO 12185 standards. Its automatic temperature compensation ensures accurate results regardless of ambient conditions, critical for maintaining product quality and regulatory compliance.


Pharmaceutical & Cosmetics

In pharmaceutical labs, the instrument verifies the density of liquid APIs and excipients, ensuring batch uniformity in solutions and emulsions. Cosmetic manufacturers use it to analyze creams, lotions, and perfumes, optimizing product consistency and sensory properties to meet consumer expectations.


Food & Beverage Quality Control

Breweries and distilleries replace time-consuming manual hydrometers with the ZG-MD90 to measure wort and spirit density, determining alcohol content and extract concentration efficiently. It also tests syrups, sauces, and other food products to ensure compliance with food safety regulations.


Academic & Research Labs

Research teams use the ZG-MD90 to characterize novel fluids like ionic liquids and nanofluids, measuring density as a function of temperature and concentration. Data export via USB, Ethernet, or SD card facilitates integration with computational models for fluid dynamics studies, accelerating research progress.


Fully-automatic liquid densimeter

Model

ZG-MD90

Density resolution

0.00001g/cm3

Repetitiveness

±0.00005g/cm3

Accuracy

±0.0001g/cm3

Test range

0-3g/cm3

Temperature resolution

0.01℃

Repetitiveness

±0.1℃

Temperature control mode

Peltier control temperature

Temperature control range

5℃ to 65℃

Test method

U-shaped vibration tube method

Sampling capacity

About 2 mL injected manually and about 3 mL automatically by automatic pump

Sampling method

The syringe will be injected manually or automatically sampled by a built-in injection pump

Cleaning function

Automatic cleaning (compatible with manual work)

Video function

yes

Measuring time

Manual operation for 1~4 minutes, and automatic program for 2~10 minutes (according to the actual temperature of the sample)

Display screen

10-inch HD touch-screen display

Display value

Density, relative density, temperature, concentration, Baume degree

Measuring method

Store 100 sets of custom measurement methods, including the measurement parameters for each sample

Stability judgment

According to measurement accuracy and time, stability time can be set voluntarily

Concentration conversion

Enter the density and concentration tables or conversion formulas to automatically convert the concentration values

Statistical calculation

The 100 sets of test values are automatically saved, and the average, maximum and minimum values can be automatically calculated

Output method

Standard: RS232, RJ 45, SD card, U disk, USB can be customized

wifi printing

yes

Optional function

User management, audit tracking, electronic signature, downloading file verification high level protection MD5, various file downloading formats such as PDF and Excel, other functions can be customized according to requirements.


MD80-1

FAQ


How accurate is the ZG-MD90 Fully Automatic Liquid Density Meter?

The ZG-MD90 offers industry-leading accuracy of ±0.0001 g/cm³ and a resolution of 0.00001 g/cm³, supported by a quartz U-tube oscillator and Peltier temperature control. Its repetitiveness is ±0.00005 g/cm³, ensuring consistent results across multiple measurements.


Can the ZG-MD90 handle corrosive samples?

Yes. Wetted parts are constructed from PEEK and sapphire, which resist concentrated acids, bases, and organic solvents. The automatic leak detection system provides an extra layer of protection against equipment damage.


What sample volume does the ZG-MD90 require?

The instrument needs only 2 mL for manual injection and 3 mL for automatic sampling via the built-in pump, making it ideal for applications with limited sample availability.


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