Dip Probe vs. Arch Probe

The Distek Opt-Diss 405 fiber-optic UV spectrophotometer utilizes the patented Arch probes in order to acquire absorbance-data in-situ.  Other fiber-optic systems use a different style probe called dip probes.  The Distek Arch probes have several advantages over the dip probes, thereby ensuring better results for in-situ UV analysis:

1) With a dip probe, the UV light has to reflect through a horizontally placed prism in order to be retransmitted back to the detector.  These horizontal surfaces allow either particulate matter to collect on the bottom surface of the prism, or air bubbles to be trapped underneath the top surface (shown above). 

2) The profile of an Arch probe is smaller and thinner than a dip probe, so there are less hydrodynamic effects from the Arch probe as it resides in the vessel.

3) The Arch probe has a wide-range of pathlengths, from 0.25mm to 10mm.  The shortest pathlength that a dip probe can be made in is 1mm.

Leave a comment

Filed under Opt-Diss 405, Parts & Accessories

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s