Model 44 / 42 Cryogenic Temperature Controller

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The Model 42/44 cryogenic temperature controllers are the first instruments in their class to extend operation to ultra-low temperature providing robust support for He3 refrigerators at a very cost-effective price.

The Model 42 has two multi-purpose inputs and the Model 44 has four. Each input is capable of temperature measurement to below 100mK by using a sophisticated 100μV ratiometric resistance bridge. For general-purpose thermometry applications, the inputs support a wide variety of standard sensors.

The dual-output control loop circuits features power levels as high as 50W and as low as 50mW full-scale in order to support ultra-low temperature operation.

Cryo-con’s Model 42/44 are the first temperature controllers to incorporate Ethernet LAN connectivity which adds a new dimension of flexibility to industrial and laboratory applications. Ethernet is an effective upgrade and replacement for IEEE-488 (GPIB) based systems.

Ultra-Low temperature:

• 100µV Constant-Voltage excitation offers robust support for Ruthenium-Oxide or Cernox™ sensors to <100mK.
• Four input channels. Most He3 refrigerators require at least three.
• High precision control loop with PID control that is enhanced for operation below 1.0K.

Cryogen-Free systems:

• Proprietary cryocooler thermal signature removal offers the best control stability in the industry for cryocooler based systems.
• Four input channels. Cryogen-Free systems often require more than two.
• Especially effective in ultra-low temperature cryogen-free systems.

Superconducting Magnets:

• Constant-voltage sensor excitation extends the high and low temperature range of sensors normally used in high magnetic fields.
• Cryogen-Free magnet systems often require more than two inputs.

General purpose laboratory:

• Up to 4 inputs. Each supports virtually every cryogenic temperature sensor offered by every manufacturer.
• Constant-Voltage excitation offers the widest possible temperature range for a given sensor.
• Dual control loops. Digital Signal Processing techniques extend control loop resolution to provide the best control stability and widest range in the industry.
• Ethernet connectivity for ease of remote control. Significant upgrade over IEEE-488 or RS-232 based systems. Native LabView™ support.
• Robust cryostat protection controls.
• Complete instrument configurations may be saved and instantly restored.

Data Acquisition / Computer control:

• Ethernet interface in addition to IEEE-488 and RS-232. Ethernet allows the simple and inexpensive connection of many instruments to a Local Area Network. It is directly supported by all data acquisition software packages including LabView™.
• Robust implementation of the IEEE-488.2 SCPI command language facilitates system software development.
• Remote command language is identical across the entire product line, therefore ensuring your system software will not become obsolete.