Shanghai Yuke. utilizes the internationally advanced U-tube oscillation principle for measurement, enabling rapid determination of liquid density and relative density. By injecting a small amount of sample (2–3 ml) into the oscillating U-tube, the system calculates the sample's density based on changes in the oscillation frequency and pre-calibrated data.

Compared to traditional methods—such as volumetric flasks, hydrometers, and balance-based density meters—the Smart-D90 series automatic density meters offer advantages including minimal sample consumption, precise temperature control, ease of use, high measurement accuracy, and excellent repeatability.

Integrating Peltier precision temperature control and high-definition video monitoring technologies, the  Smart-D90 series provides accurate, stable, and reliable results while ensuring an efficient and convenient user experience; the high-definition video allows users to easily check for the presence of interfering air bubbles in the sample.

l User Interface: Features a color Android touchscreen; high-definition video monitoring makes inspection more intuitive and convenient.

l Low Sample Volume: Requires only 2–3 ml of sample per measurement, conserving resources and reducing costs.

l Measurement Modes: Includes built-in modes for density, relative density, and specific applications such as general use, pharmaceuticals, chemicals, and petroleum.

l Temperature Control: Built-in Peltier precision temperature control system ensures accurate density measurement under controlled thermal conditions.

l Rapid Testing: Offers a choice between rapid real-time density mode and precision measurement mode for user convenience.

l Instrument Calibration: Simple error verification and calibration using only dry air and distilled water.

l Communication Interfaces: Built-in network module and LIMS interface; equipped with multiple communication ports for data storage, export, and printing.

l User Management: Four-level user access management; supports data reporting, 21 CFR Part 11 compliance, audit trails, pharmacopoeia standards, and electronic signatures. 

1. Brewing Industry: Measurement of alcohol concentration in *baijiu* (Chinese spirits), yellow rice wine, red wine, beer, fruit wine, rice wine, etc.

2. Flavors & Fragrances: Quality verification of raw materials for food flavors, daily-use fragrances, tobacco flavors, and food additives.

3. Pharmaceutical Industry: Quality control of active pharmaceutical ingredients (APIs) and intermediates; determination of specific gravity and density of pharmaceutical preparations.

4. Beverage Industry: Measurement of sugar concentration; quality control for fruit juice, herbal tea, food additives, and soft drinks.

5. Food Industry: Quality control for grape juice, tomato juice, fruit syrups, vegetable oils, and canned food processing.

6. Petrochemical Industry: Crude oil API gravity; density testing for gasoline and diesel; monitoring of additive blending processes.

7. Chemical Industry: Concentration testing for urea, detergents, ethylene glycol, acids/alkalis, and aqueous ammonia.

8. Machinery Manufacturing: Testing of cleaning agents for metalworking, machinery manufacturing, the automotive industry, and electronics/electrical appliances.

9. Testing Institutions: Liquid density measurement for standard laboratories, statutory testing agencies, and third-party testing services.

l Food Industry: GB/T 5009.2-2024 "Determination of relative density of food"; GB/T 10345-2007 "Methods of analysis for *baijiu*"; GB/T 4928-2008 "Methods of analysis for beer"; GB/T 15038-2006 "General methods of analysis for wines and fruit wines"; GB/T 5009.225-2023 "Determination of ethanol concentration in alcoholic beverages."

l GB/T 29617-2013 Test method for density, relative density, and API gravity of liquids by digital density meter.

l GB/T 2013-2010 Determination of density for liquid petrochemical products (U-tube oscillation method).

l SH/T 0604-2000 Determination of density for crude oil and petroleum products (U-tube oscillation method).

l SN/T 2383-2009 Determination of density and relative density for liquid chemical products (Digital density meter method).

l DB/T 1231-2010 Methods for Determining the Density of Chemical Products: Digital Liquid Density Meter Method

l ASTM D4052-11 Standard Test Method for Density, Relative Density, and API Gravity of Liquids by Digital Density Meter

l ASTM D5002-13 Standard Test Method for Density and Relative Density of Crude Oils by Digital Density Analyzer

l ASTM D3505-12e1 Standard Test Method for Density or Relative Density of Pure Liquid Chemicals

l ISO 12185:1996 Crude petroleum and petroleum products—Determination of density—Oscillating U-tube method

Common Configurations (all models)

keyword search：Density Meter