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Janis VNF Series Cryostat Systems
Sample in Flowing Vapour
The Lake Shore VNF cryostat is an inexpensive liquid nitrogen cryostat offering operating temperatures from 65 K to 325 K. Simple to use and refill, the VPF system uses a refill style displacer assembly and built-in heater to provide variable temperature capability. Temperatures below 77 K are achieved using an optional pumping manifold. High-temperature capability is provided using special sensors and heaters.
Optional window materials can be installed to span the far/mid- IR, VUV, and x-ray regions for a variety of spectroscopic measurements. The refill assembly permits the refilling of the LN2 reservoir without affecting the controlled temperature.
Standard configuration
The Janis VNF-100 cryostat is a liquid nitrogen variable temperature cryostat with the sample located in flowing vapour. Ideal for experiments with samples that are difficult to thermally anchor such as liquid or powder samples, the VNF-100 is a low-cost alternative to the SuperTran-VP or SuperVariTemp Dewars when temperatures below 65 K are not required. The VNF-100 features a top-loading sample chamber for rapid sample exchange, and four-way, f = 1.0, optical access to the sample chamber.
FEATURES
- 65 K to 325 K
- Uses LN2
- Sample-in-flowing-vapour
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Specifications
| Cooling type | LN2 |
| Minimum temperature | 65 K to 77 K (temperatures below 77 K with optional pumping manifold) |
| Maximum temperature | 325 K |
| Sample environment | Flowing vapor |
| Cooldown | 30 min (to 77 K) |
| Sample change time | <10 min |
| Typical stability | ±50 mK (measured with temperature controller) |
| LN2 capacity | 1.2 L |
| Working time (typical) | 6 h to 8 h |
| Initial cooldown time (from room temperature) | Approximately 30 min |
| Approximate weight | 19 lb (11.5 kg) |
