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Ventacon Limited


Designed and optimised exclusively for
Fourier Transform Raman Spectrometers

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The Ventacon T2 Autochanger Tablet Analyser

The Ventacon Autochanger Analyser allows the user to analyse several tablets or liquids in tubes in succession. The accessory is automatically driven, enabling the user to leave the accessory running unmanned for several hours.

Tablets are rotated and moved up and down as they are examined. The Raman spectrum is the average across the whole scanned area of the tablet surface. The amplitude of vertical movement is adjustable in several steps. This tablet analyser can therefore be used for a wide range of tablet sizes. Liquids can be rotated or kept fixed in their tubes, but in this case no vertical movement is required.

A stepper motor-driven carousel is used to auto-change samples. The carousel holds 20 tablets or tubes. It moves to drop tablets, one at a time, into position for study. The carousel sits on the top of the accessory. One carousel unit is required for each tablet size. The rotator and vertical translator lie beneath the carousel. You will see in the photo above that 2 white tablets remain in the carousel. Beneath it one tablet is in place in the rotator and being examined by the spectrometer. The brass component to the right of the accessory is an eccentric driven by a small motor/gearbox behind it. An arm and follower is moved up and down by the eccentric.  This in turn moves the whole carousel.

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Ventacon Autochanger with Model 21 carousel removed
The rotator/translator lies to the left.
The carousel lies to the right