Device built-in

KEM Digital Density Meter DA-645 Technical Overview

Core Specifications and Design Philosophy

The DA-645 is a high-precision digital density meter/specific gravity meter developed by Kyoto Electronics (KEM) of Japan. Utilizing the U-tube oscillation method, it is designed for density and concentration analysis in liquid chemicals, petroleum, food, pharmaceuticals, and other industries. Its key advantages include:

• Ultra-High Precision Measurement: Density measurement range of 0–3 g/cm³ with an accuracy of ±5×10⁻⁵ g/cm³, and temperature control precision of ±0.03°C (equipped with a Peltier thermostatic system).
• Intelligent Operation: Features a 5.7-inch TFT touchscreen displaying density, specific gravity, temperature, and other parameters, supporting Chinese/English language switching. Complies with GLP standards and stores 100 measurement methods and calibration records.

Innovative Technical Features

1. Fully Automated Workflow

   • Built-in sampling pump enables automatic sampling (~2mL), cleaning, and drying, minimizing manual intervention. Auto-viscosity correction eliminates the need for manual viscosity input.
   • Four-Stage Stability Judgment: Adjusts measurement time based on precision requirements, balancing efficiency and accuracy.

2. Safety and Scalability

   • Equipped with automatic measurement cell dryness detection to prevent residual contamination. Smooth joint design minimizes bubble formation, enhancing data reliability.
   • Optional Multi-Sample Autosampler (CHD-502N) or external refractometer for simultaneous density and refractive index measurement.

Typical Applications

• Petrochemicals: Complies with ASTM D4052 and ISO 12185 standards for crude oil and fuel oil density testing.
• Food & Beverage: Alcohol concentration (e.g., whiskey, beer) and syrup density measurement, with built-in concentration conversion tables.
• Pharmaceuticals & Fragrances: Requires only small samples (1mL) for precise analysis of high-value substances.

Operation and Cost Efficiency

• Low-Maintenance Design: Only requires periodic replacement of cleaning solutions (e.g., toluene, acetone), with no moving parts prone to wear.
• Economic Advantage: Saves 60% in consumable costs over a 3-year period compared to traditional methods, while eliminating gas cylinder transportation risks.

Industry Positioning: The DA-645 sets the benchmark for laboratory density analysis with its "precision, efficiency, and safety", particularly suited for users demanding high data repeatability and automation. CE-certified, it is widely adopted in China, Europe, the U.S., and other markets.