Freeze dryers

Freeze drying is often an important stage in the purification of products. A lot of work, whether before or after drying, can be destroyed by uneven drying, and so calibration/validation of freeze dryers is important. RISE calibrates freeze dryers, which can also be performed in the form of validation, i.e. checking performance for compliance with specified requirements.
Validation of freeze dryers

Freeze dryers have many applications, e.g. to create products that will keep, or as a process stage in purification. 

Documentation and service

In order to be able to provide the necessary documentation for products, and to be sure that freeze dryers are operating correctly, dryers require not only normal service but also regular inspection and validation.  This is particularly important, as drying is often one of the final stages of manufacture, and a lot of work can have been wasted if freeze drying performance is inadequate. 

Calibration / validation consists of the following: 
  • Calibration of vacuum sensors used for documentation and inspection 
  • Temperature calibration of sensors used for documentation and inspection
  • Measurement of the temperature in the space in which the products are contained (logging against time, differences from one part of the product space to another, relationship between the space and the product)

The traceability chain - the link to basic quantities

A key concept of measurement technology is that of traceability, which means that all measurements made with a calibrated instrument or device must have a directly traceable link back to the defined quantity. Read more...

Calibration of pressure balances

Pressure balances are the most stable and linear devices used for the measurement of pressure. Read more...

Dynamic pressure measurements

We can help you with measurements and measuring systems. Read more...

Related Information


New methods to calibrate low gas flow

Contact Persons

Fredrik Arrhén

Phone: +46 10 516 56 24

RISE Research Institutes of Sweden, Phone 010-516 50 00, E-mail

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