• Temperature controller for continuous flow cryostats and cryostreamers

The tSTAT335x is the temperature controller for the continuous flow cryostats, which use liquid nitrogen as a coolant. The controller unit regulates the sample temperature in the range from 77.4 K up to 473 K. The tSTAT335x controls the resistive heater power arranged at the heat exchanger as well as the nitrogen gas flow rate by variation of the heater power within the storage dewar. The controller unit also has an integrated watch dog for the liquid nitrogen level.

For temperature measurements a NiCr:Ni thermocouple is used. The reference junction is build by an electronically compensated ice-point. The controller tSTAT335x has a remote control capability via a serial RS-232 interface. One can control the unit and obtain the actual status and settings by simple plain text commands.

How the temperature controller works

The set value of the temperature can be given either in µV or in Kelvin. It can be set manually with the keys in the control panel or remote via the serial RS-232 interface.