The Labmart DK-300 Density Determination Kit is designed for measuring the density of solid objects and liquid samples using a compatible weighing balance. Suitable for balances with a pan diameter below 125 mm, the kit supports density determination using weight measurements in air and in a fluid. It includes a beaker, beaker stand, hanging holder, object holder and crystal ball, providing the essential accessories for solid and liquid density measurement procedures.

Key Features

• Dual-purpose density testing: Designed for measuring the density of solids and liquids.

• Balance compatibility: Suitable for weighing balances with a pan diameter below 125 mm.

• Manual calculation option: Density can be calculated using weight measurements if the balance lacks a dedicated density function.

• Solid density measurement: Supports measurement using weights in air and in a fluid.

• Liquid density measurement: Uses the supplied crystal ball to establish volume and determine liquid density.

• Complete accessory set: Includes a beaker, stand, hanging holder, object holder and crystal ball.

• Laboratory applications: Suitable for density testing in research and quality-control environments.

5. Technical Specifications

Note: The supplied documentation does not specify the kit's dimensions, material, measurement range, accuracy or the crystal ball's nominal volume.

6. Standard Accessories

The Labmart DK-300 includes:

1. Beaker

2. Stand for beaker

3. Hanging holder

4. Object holder

5. Crystal ball

Working Principle

A. Density determination of solids

The supplied documentation gives the following relationship:

Where:

• \(W_{\text{air}}\) = weight of the solid measured in air

• \(W_{\text{fluid}}\) = weight of the solid measured while immersed in the fluid

• \(SG_{\text{fluid}}\) = specific gravity of the reference fluid, as defined for the calculation method

B. Density determination of liquids

The product documentation describes a two-stage process:

1. Measure the volume of the crystal ball using distilled water.

2. Use the calculated volume of the crystal ball to determine the density of the test liquid from the weight difference.

The supplied formula for calculating the crystal ball's volume is:

The constants are expressed in g/cm³ in the product documentation: 0.997 g/cm³ for water density and 0.001185 g/cm³ for air buoyancy.

The density of the test liquid is then calculated as:

Use consistent measurement conditions and units, and follow the balance manufacturer's procedure when carrying out these calculations.