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Continuous flow low-temperature thermostat
When using a continuous flow liquid nitrogen (helium) thermostat, low-pressure refrigerant enters the thermostat from the infusion tube through the inlet, and then enters the evaporator amplifier inside the thermostat through the pre laid low-temperature leakage capillary tube. A heater and temperature sensor are installed on the evaporator, and the steam after temperature control is sprayed into the sample chamber. After cooling the sample, the steam is discharged into the atmosphere through the outlet or into the gas recovery device. The design standard for this continuous flow thermostat is to install a sample at the top, and the overall design of the thermostat is compact. It is also possible to customize the loading design of the protruding press machine, which is compatible with the electromagnetic coil and bracket produced by our company, making it easy to be placed in a magnetic field and able to obtain a larger magnetic field.
The conventional products of liquid nitrogen/liquid helium continuous flow thermostats include a set of beryllium copper Sm30 press with IIa standard anvil, a set of domestically produced liquid nitrogen self pressurization tank with flow valve infusion tube, a set of oil-free low vibration molecular pump unit (including shock absorber block), a set of ELT335 low-temperature dual channel temperature controller, and a set of liquid nitrogen thermostat main chamber. If there is a need for low-temperature in-situ pressure control, customized vacuum sliding seal screw pressurization or PA5000 electric pressure controller can be used to implement in-situ gas film pressure control.
Function and Features:
Specially designed for diamond anvil experiments;
We provide various diamond pressure pack sample holders, which are cooled by thermal conduction in vacuum to meet different testing requirements and optical testing needs;
※ Temperature range under no-load conditions (liquid helium 5K~325K), (liquid nitrogen 78K~325K), (optional high temperature up to 475K);
※ Cooling time (room temperature -78K, about 0.5h), (room temperature -5K, about 0.7h);
Temperature stability is better than ± 0.05K under no-load conditions and better than ± 0.1K under load conditions;
The medium consumption required to maintain the lowest temperature under no-load conditions (liquid helium-5K, liquid nitrogen -78K) is 0.2 L/h;
The top loading allows for quick replacement of samples, with good cooling effect and even heating of the samples;
Standard configuration includes a cooling table monitoring temperature sensor and heater, as well as a compressor monitoring temperature sensor;
Standard configuration includes 8 electrical measurement leads;
When the temperature range is 78K-325K, use PT100 temperature sensor; When the temperature range is 5K-325K, use the CT640 temperature sensor with good stability and repeatability; Placed in a magnetic field, use CernoxTM magnetic field insensitive thermometer;
The detachable stainless steel infusion pipeline connects the low-temperature thermostat and Dewar, with a needle valve controlling the flow rate.
Customized in-situ pressure control or other requirements can be made according to customer requirements.
