Liquid helium bath cryostats
We offer a range of helium bath cryostats suitable for cooling cryogenic detectors and other applications where long hold time, optical access, and easy access to the cryostat cold plate are required.
Following customer requests, we have redesigned our most popular helium bath cryostat, the 1813, to reduce the weight by over 25%.
| Model | TK1813 | TK1840 | TK1865 | TK1875 |
| Cold plate dia. (mm) | 125 | 200 | 200 | 250 |
| Liquid helium capacity (litres) | 1.7 | 4.5 | 6.0 | 9.5 |
| Liquid nitrogen capacity (litres) | 1.4 | 4.3 | 6.5 | 10.0 |
| Hold time, (typical, not including initial fill, in days, ports blanked) | >6 | > 20 | > 30 | > 45 |
| with broadband load | 2-3 | 5 | 8 | 14-21 |
| Liquid nitrogen hold time (approx., in hours) | 18-28 | 36-48 | 60-80 |
> 90 |
| Cryostat diameter (mm) | 225 | 300 | 300 | 365 |
| Cryostat height (excluding lifting handle) (mm) | 510 | 560 | 710 | 710 |
| Mass (empty) (kg) | 14.5 (New!) | 25 | 35 | 40 |
| Ports (optical/electrical feedthroughs) | Four on the side of the cryostat * |
| Maximum port clear aperture | 28 mm (77 K radiation shield limit) |
| Electrical connector (standard) | 10 pin low-voltage electrical connector |
| Optic axis height | 20 mm |
| Headroom (when cold) | 77 mm |
Our cryostats offer unparalleled cryogenic efficiency. Closed systems consume liquid helium at rates as low as 1 liquid litre per 10 days! Single-fill run-times of up to 1 month are available. Our cryostats are designed to offer the best possible environment for highly sensitive detectors, and they also provide a large volume space into which you can mount your own equipment.
Model TK1810 single Dewar bath cryostat
Model TK1813 dual reservoir cryostat
Model TK1840 dual reservoir cryostat
Model TK1865 dual reservoir cryostat
Model TK1875 dual reservoir cryostat
and
Standard cryostats are usually built to order in about eight weeks, though they are sometimes available as a stock item off the shelf. Bespoke cryostats can be designed and built to suit particular client needs.
All cryostats are fully tested and characterised before delivery. They are constructed by our sister company Thomas Keating Ltd., who purchased the design and manufacturing rights of Oxford Instrument Plc's series of bath cryostats in November 2000, maintaining the availability of these safe, easy-to-use, low liquid helium consumption, cryostats.
All designs are held in our Pro-Engineer CAD system allowing the customer full 3D visualisation. Here is a cut away section through a TK1865 cryostat:
