Technical Description and Operating Instructions
The Density Ball, Model 475, is designed for determining the density of paints, coatings, and other non-pasty fluids. It operates based on the principle that a body immersed in a liquid produces an upward force, allowing density calculation based on the known volume of the body.

Design and Versions
The device consists of a stainless steel spherical body and a holding rod. It is available in four versions:

• Model 475/I: 100 ml volume, ±0.1% accuracy at 20°C.
• Model 475/II: Same as 475/I but with conformity assessment.
• Model 475/III: 10 ml volume, ±0.1% accuracy at 20°C.
• Model 475/IV: Same as 475/III but with conformity assessment.

Test Procedure
The specimen is placed in a beaker, heated to 20 ± 0.5°C, and weighed before and after immersing the density ball. The density is calculated using the formula:
ρ = (W2 - W1 + ρL) / V
where W1 and W2 are the weights before and after immersion, V is the volume, and ρL is the air density (0.0012 g/ml).

Important Considerations
Ensure no air bubbles are present in the liquid. The method is unsuitable for specimens with rapid sedimentation. The ball should be handled vertically to avoid stress on the neck section.

Certification and Order Information
All models come with a Manufacturer’s Certificate M, confirming a volume deviation of less than 0.1%. They can also be supplied with a conformity assessment. Order numbers are provided for each model and accessories like holding devices and table stands.

Note
Technical modifications are subject to change.