Cryo Accessories : top hats, pins & bases

Nickel top hats

These top hats are constructed from nickel to avoid rust and are ideal for use with commercially available and home-made loops.

Their rounded tops provide a smooth and turbulent free path for the nitrogen gas stream
A perpendicular breath hole means the top hats can be clamped to the top of a cryovial and still retain a path through which the nitrogen gas can breathe
Flat side so they can be easily and safely gripped by tweezers
Thin metal pin to reduce turbulence and icing

Stainless steel pins

The design of these pins makes mounting the loops easier and the construction assists to minimise icing. These pins are ‘Cryostream friendly’ and features include:

3mm support base for the needle
0.5mm hollow in the needle into which the loop can be mounted
Small diameter to minimise turbulence in the nitrogen stream
Stainless steel construction creates a conducting path across the cold nitrogen/warm dry air boundary for non-collinear geometries, an important factor in preventing ice formation
Overall height of loop can be adjusted by pushing the pin base further into the top hat and retaining it with the grub screw
IUCr Standard pin Reference
Acta. Cryst. 9 976 (1956)
Slot for pin - 3.18/3.19mm (0.1250/0.1255")
Diameter of pin - 3.16/3.15mm (0.1245/0.1240")

Magnetic base

The magnetic base provides a means of holding the top hats accurately on the Goniometer Head. The base consists of a small magnetic surface on a stainless steel base.

Fits into all IUCr standard goniometer heads
The magnet is strong enough to hold the top hat but not so strong that the experimenter loses control of the top hat as it nears the magnet and risks losing a vital crystal
Centred on the magnetic base with an alignment nipple
Rounded alignment nipple to prevent the top hat from being 'snapped' onto place

For further ordering and pricing details, please contact us.

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