FAQ´s

1.) What is the difference between a measuring head made of quartz and one made of sapphire?

Quartz measuring heads offer best possible light path tolerances and are ideally suited for the use in the UV range.
Sapphire has a very high chemical stability and is thus highly resistant against aggressive media.

2.) What should be considered when unpacking an optical immersion probe?

Hellma Analytics uses a groundbreaking packaging system ? get to know more: 
Video: Unpacking a Hellma Analytics immersion probe
Video: Unpacking a Hellma Analytics immersion probe with fixed fiber


3.) How do I connect the optical immersion probe to my spectrometer? Compatibility?


Hellma Analytics optical immersion probes are equipped with FSMA connectors as standard and are thus compatible with any well-established FT-NIR or UV/Vis spectrometers. On request, Hellma Analytics offers various connectors (such as FC/PC or DIN).

4.) Are optical immersion probes autoclavable?

All sealed Kalrez probe's parts in contact with fluid are autoclavable.
Furthermore, it is possible to manufacture optical immersion probes autoclavable as a whole. For this, the fibre-optic cable connections (SMA) need to be sealed as well. Hellma Analytics offers appropriate solutions - please do not hesitate to contact us.

5.) What steps can be taken to ensure that the interchangeable light path tips do not loosen and fall into the process?


The light path tips have an O-ring stopper (similar to a self-locking nut) that prevents the light path tip from coming loose. Thus ensuring that no foreign parts can enter the process.

6.) Do you carry out pressure and stability tests?

Hellma Analytics carries out pressure and stability tests with every optical immersion probe. In addition, a helium leak test will be carried out with probes sealed with an O-ring to make sure that the installation was successful.

7.) Are demo models available e.g. for feasibility studies?

Yes. Hellma Analytics provides demo models for test purposes, contact us today.

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