What’s the difference between density, specific density and true density?

Density or mass density (ρ) is the ratio between mass (m) and volume (V) of a sample which is expressed in the formula: ρ=m/V.

The most common units are kg/cm³ or g/cm³, whereas 1000k kg/m³ equal one g/cm³. The volume of a sample is depending on its temperature. Hence, the density is also highly depending on the temperature. Therefore, a precise measurement or regulation of the sample temperature is the key for precise results.

Besides the mass density we encounter the relative or specific density as well as the true or apparent density.

Specific or relative density

The specific or relative density is used to simplify the comparison of measurements The density of the sample is compared with the density of a reference substance (often water) and the units are omitted.

Real and apparent density

Depending on the measurement principle we either measure the real or the apparent density. The real density is the density of the sample in vacuum. Whereas the apparent density is density of the sample including the influence of the surrounding air. Consequently the apparent density measure about 1.2 kg/m³ too low. All Schmidt & Haensch density meters measure the real density.

Typical applications:
Dairy industry, Petro Chemicals, Polymers, Alcoholic Beverages, Cosmetic and Pharmaceutical Creams

Dear valued customer and business friend,

We are taking all possible measures to secure the health of our employees as well as our customers.

As we have already informed you, Schmidt+Haensch remains fully operational.

We are organising whenever possible work from home offices. Our production lines are continuously producing and our supply chains are so far secured.

We are most interested to offer our services as usual. Instead of personal visits we have built up internet communications in order to help you remotely.

All our contacts as well as phone numbers remain accessible.

For service issues please do not hesitate to contact us via e-mail to service@schmidt-haensch.de or telephone under +49 (030) 417 072 – 41 / - 42

For sales inquiries please contact us via e-mail to sales@schmidt-haensch.de or call our sales engineers.

We wish you to stay well and healthy.

Let us try to overcome these most exceptional circumstances by looking after each other with the necessary care and distance.

Best regards

Mathis Kuchejda


Corona Update