Liquid Nitrogen Thermostat - Continuous Flow
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Liquid Nitrogen Thermostat - Continuous Flow
Jinzhengmao continuous flow liquid nitrogen (helium) thermostat is a thermostat for samples in flowing steam, which can effectively cool and cool samples that are difficult to thermally anchor, have poor thermal conductivity or are irregular in shape. When in use, the low-pressure refrigerant enters the thermostat from the infusion pipe through the liquid inlet, and then enters the evaporation amplifier inside the thermostat through the pre-laid low-temperature heat leakage capillary inside the thermostat. The evaporator is equipped with a heater and a temperature The sensor, the steam after temperature control is sprayed into the sample chamber. The steam after cooling the sample is discharged into the atmosphere through the air outlet or discharged into the gas recovery device to realize the secondary utilization of the gas. The design of this continuous flow thermostat is still to load the sample at the top. The overall design of the thermostat is compact, and it cooperates with the magnet and bracket produced by Jinzhengmao, which is convenient for the sample to be placed in the magnetic field, and can obtain a large magnetic field at the same time.
Functions and Features:
※ Variable temperature range (4K~325K), (80K~325K), (optional 475K) has good cooling effect, and the sample is heated evenly;
※ Suitable for cooling samples with irregular shapes and low thermal conductivity;
※ When the temperature range is 4K-325K, use a silicon diode temperature sensor. When the temperature range is 80K-325K, use a PT100 platinum resistor with good stability and repeatability, put it in a magnetic field, and use a CernoxTM magnetic field insensitive thermometer.
※ Top loading for quick sample change
※ Built-in charcoal to improve vacuum
※ Can be customized according to customer requirements;
※ 8 measuring leads are standard, which can be expanded to 32;
※ The detachable stainless steel infusion line is used to connect the cryostat and the Dewar, and the needle valve is used to control the flow.
Technical Parameter:
Project
Technical Parameter
Temperature Range
4K-325K，80K-325K
Cooling Time
(room temperature-80K), about 20min, (room temperature-4.2K), about 30min
Electrical Connector
Standard configuration is an 8-pin electrical measurement connector
Thermometer
PT100 thermometer, diode thermometer, Cernox thermometer optional
Temperature Stability
±0.01K depends on the temperature controller
Heater
1 50W heater
Vacuum Interface
KF25 standard interface
Sample Rotation Angle
The sample can be rotated 360 degrees
Required Vacuum
The vacuum degree of the interlayer and the vacuum degree of the sample chamber should be less than or equal to 1Pa.
Liquid Nitrogen Consumption
1.5L@4.2K/h
Liquid Nitrogen Chamber Volume
About 1.6L
Window Selection
Fused silica, infrared silicon material, sapphire, zinc selenide, zinc sulfide, cadmium, telluride, germanium, silicon, cadmium fluoride, mylar, kapton, beryllium, etc. The size can be customized according to different requirements.
Selection Instructions
The main samples tested by this type of thermostat are liquids, powders, samples with poor thermal conductivity and irregular shapes
