Liquid Nitrogen Cryostat - Electrical
Working principle
Put liquid nitrogen into the liquid nitrogen chamber inside the cryostat, keep the heat leakage of the cold finger stable at a certain value by adjusting the gap between the temperature control plug and the cold finger, and then adjust the heating output power through the DXTC-290 temperature controller so that The temperature of the cryostat changes rapidly between 80K-600K and can quickly stabilize to a certain set value; in addition, if the cryostat is equipped with a step-down option, the temperature of the cryostat can be reduced to 65K , and stabilized at 65K.
Features
◆ Temperature range (65K~500K), (optional 700K), high efficiency and fast cooling speed;
◆ The sample is placed in a vacuum chamber, providing an ideal and stable experimental environment;
◆ The vacuum interlayer is equipped with low-temperature adsorbent, which can increase the vacuum holding time and extend the use time of liquid nitrogen;
◆ The temperature sensor uses PT100 platinum resistor with good stability and repeatability;
◆ Multiple options to meet different testing needs;
◆ It is convenient to add liquid nitrogen during use;
◆ The electrical sample holder is equipped with a pluggable sample card and easy-to-use and beautiful binding posts;
◆ Can be customized according to customer requirements;
◆ Comes with 8 measurement leads as standard and can be expanded to 32.
Technical specifications
| Model | DXT9015 | DXT9015H | DXT9020 | DXT9020H | DXT9030 | DXT9030H |
| Temperature range | 65-325k | 65-500K | 65-325k | 65-500k | 65-325k | 65-500k |
| Cooling time | ≤≤25min (cool down to 80K) ; ≤40min (cool down to 65K) | |||||
| Electrical connector | Standard 8-pin plug (expandable) | |||||
| Sample holder size | 15X25mm | 20X30mm | 30X40mm | |||
| Thermometer | PT100 platinum resistance thermometer (both calibrated and uncalibrated, the default is uncalibrated) | |||||
| Temperature stability | ±0.01K depends on the temperature controller | |||||
| Heater | 30W | 60W | 30W | 60W | 30W | 60W |
| Vacuum interface | Standard KF25 | |||||
| Sample environment | Vacuum | |||||
| Required vacuum degree | ≤1Pa is enough | |||||
| Liquid nitrogen holding time | 6h@80K; 5h@100K; 3h@200K | |||||
| Liquid nitrogen chamber volume | Standard 500ml (can be customized) | |||||
| Selection instructions | The electrical measurement liquid nitrogen cryostat is equipped with an electrical 8-core measurement connector, which can be expanded to 32 cores. The wires can be ordinary enameled wire, PTFE wire, low-temperature phosphor bronze wire, low-temperature coaxial wire, etc. In addition, the cryostat has a compact structure and is suitable for use with magnets. Complete electromagnetic testing of sample materials, resistivity, magnetoresistance, Hall effect, etc. | |||||
Sample holder options:
| Model | Specifications and Parameters | Material | Describe |
| DXT9015 | 15X25mm | OFHC | Standard electrical sample holder, with 4 binding posts distributed up and down. |
| DXT9020 | 20X30mm | OFHC | |
| DXT9030 | 30X40mm | OFHC |
Remark:
1: All standard electrical cryostats are shipped with only one sample holder.
2: Can be customized according to customer requirements.
Cryostat electrical connector options:
| Electrical connector model | Specifications and Parameters | Describe |
| DXT90-8P ordinary glass sintering | 8pin | Add a quick-plug 8P ordinary electrical connector |
| DXT90-12P ordinary glass sintering | 12pin | Add a quick-plug 12P ordinary electrical connector |
| DXT90-SMA | 0-18GHz | With soft cable |
| 0-12.4GHz | Equipped with semi-rigid and semi-flexible cables | |
| DXT90-BNC | 0-4GHz | With ordinary coaxial cable |
| DXT90-TRX | Triax connector | Add a quick-plug triaxial connector |
| DXT90-S | Stainless steel junction box | Add a stainless steel junction box |
| DXT90-PTEF | PTFE wiring cover | Add a PTFE plate wiring cover to the stainless steel junction box |
Remark:
1: All electrical cryostats are equipped with two connectors when they leave the factory. One is a connector used for installing the temperature sensor and heater, and the other is an electrical connector prepared for electrical measurements. When more electrical test wiring is needed When necessary, you need to add mounting holes or install one or more Breakout Boxes.
2: Among the cryostat electrical connector options, there is the T90-S option. This option is the joint box shell installed on the option that is integrally connected together to form a ground. The other is the T90-PTEF option. This option is The shell and the installed connector are connected with PTFE insulation, and the electrical properties of the shell and the connector are independent of each other. This issue should be paid attention to when selecting.
3: 700K high temperature thermostat can be customized.
4: Pressure reduction accessories option. The standard thermostat itself does not have special pressure reduction means. When a low temperature of 65K is required, corresponding pressure reduction accessories need to be configured.
It is suitable for use with electromagnets. Complete electromagnetic testing of sample materials, resistivity, magnetoresistance, Hall effect, etc.
