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The modular Cryofree® ProteoxMX dilution refrigerator delivers greater experimental capacity and adaptability.

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Key Benefits

Fully customisable Secondary Insert enables rapid exchange of full experimental setups for a multi-user, multi-experiment system, saving time and money.

Greater Experimental Capability And Value With A Secondary Insert

Easy to use web-based, platform-independent software offers full control and powerful logfile visualisation from anywhere

Intuitive Software For Ease Of Use And Experience

Solutions can be built to meet varied application requirements, and easily scaled and adapted when needs change or budgets grow.

Scalability And Flexibility With Modular Upgrade


High Input/Output Capability
Enables high input/output applications through abundant line-of-sight (LOS) access.

Extensive Experimental Volume 
Large diameter mixing chamber plate, combined with increased spacing.
Maximise system value
Customisable, self-supporting Secondary Insert enhances adaptability to varied application requirements and enables rapid exchange of full experimental set-ups.

Multi-user and multi-experiment
DC wiring, coaxial wiring, cold electronic components and samples can be fully integrated on to multiple Secondary Inserts for easy removal, modification
and exchange.

Greater Control
Patented gas gap heat switch technology is leveraged to provide active control

Fast, tuneable cool down
When combined with our bottom loader technology, it enables rapid cool down of sample pucks from 300 K.

Reliability and convenience
New gas handling system delivers increased reliability and longer service intervals. This is combined with a new, powerful software control system.

High temperature operation
With independent control of the experimental plate in excess of 30 K with magnet at full field and fast recovery to base temperature.

Secondary Insert

The ProteoxMX Secondary Insert is a customisable, self-supporting module to enable installation and exchange of full experimental set-ups.


Moving beyond standard access ports, the Secondary Insert can accommodate full experimental set-ups, including DC wiring, coaxial wiring and signal conditioning components.

  • Flexible, modular format enhances adaptability to varied application requirements
  • Large 117 mm × 252 mm rectangular LOS access port. This can be configured as a single customisable plate, or with 2 × ISO100 ports and a range of standard wiring options.

ISO100 Port Configurations: A standard configuration of 2 x ISO100 ports, with multiple ISO100 options to provide experimental wiring.

  • Up to 37 UT85 coax per ISO100 port
  • Blanking plate option with tapped M3 grid array for mounting of experimental hardware.

Optional Blank Plates Instead Of Secondary Insert

If a Secondary Insert is not required, there is an optional blanking plate with tapped M3 grid array for useable experimental space.

Custom Configuration

  • Components can be directly mounted onto the Secondary Insert plate, creating a platform tailored to your experiment
  • Custom configurations enable up to 128 UT85 coax lines per Secondary Insert
  • Customisable insert for experimental wiring optimisation
  • Componentss mounted directly onto the SI to maximise space.

Cryogenic Low Noise Amplifiers And RF Components

A selection of low noise amplifiers, isolators and circulators can be integrated into the wiring configuration.

  • Custom bracketry for mounting hardware - amplifiers, isolators etc.
  • Signal conditioning mounted in-line to maximise the number of components.


  • Remote access through a web-based, platform-independent
    control software in addition to local system control
  • Automation routines for one button operation
  • Full manual control and programmable API interface for
    custom routines
  • Powerful data interrogation and visualisation package with  live plotting.
  • Step-by step wizard for guiding manual processes.


  • Fully redeveloped gas handling system to ensure the minimum
    number of connections and o-ring seals
  • Cross-braced stiffened frame that minimises vibration
    transmission eliminating the need for active damping
  • Modular, upgradable platform with cross-compatible  magnet systems.

500 μW dilution unit:

  • Base temperature: < 10 mK
  • Cooling power at 20 mK: 12 μW
  • Cooling power at 100 mK: > 450 μW
  • Temperature control range: 10 mK to 30 K with magnet at full field
  • Sample space: 360 mm diameter mixing chamber plate
  • Temperature stability: ± 1 mK < 100 mK, ± 1 %
    > 100 mK
  • PTR Options: 1 × 1.35 W, 1.50 or 1.80 W
  • 18 L of He-3 gas

300 μW dilution unit:

  • Base temperature: < 10 mK
  • Cooling power at 20 mK: 10 µW
  • Cooling power at 100 mK: 400 µW
  • Temperature control range: 10 mK to 30 K with magnet at full field
  • Sample space: 360 mm diameter mixing chamber plate
  • Temperature stability: ± 1 mK < 100 mK, ± 1 %
    > 100 mK
  • PTR Options: 1 × 1.35 W, 1.50 or 1.80 W
  • 13 L of He-3 gas

Flexible Wiring

  • 24-way twisted-pair DC looms with copper, constantan or NbTi conductors
  • Flexible coaxial (S1) wiring for use up to 500 MHz
  • Single-mode and multi-mode optical fibres
  • Thermo-coaxes for effective filtering of high-frequency noise
  • Low-impedance looms suitable for nano-positioning piezo devices.

Line-of-sight wiring

  • UT34 and UT85 coax with SMA or SK connectors for 18 GHz or 40 GHz bandwidth operation
  • Range of coax conductors including stainless-steel, CuNi and NbTi
  • Heat sinking using bulkhead connectors at all experimental plates with optional 0 dB attenuators for efficient conductor thermalisation.


Attenuators can be selected per line and per plate; 0 dB attenuators for conductor thermalisation; 3 dB, 6 dB, 10 dB and 20 dB attenuators.

Low Pass Filters

Low-pass multi-stage filters can be mounted for use at temperatures to below 100 mK.

  • 4 cut-off frequencies available between 170 Hz and 110 kHz.
  • Gold plated copper chassis with RF gaskets to provide screening and thermal dumping for the filter PCB.

Sample pucks for rapid exchange

Our patented, market leading sample loading mechanism allows for fast and easy sample exchange, without the need to warm the
entire system to room temperature:

  • Loading a sample puck takes less than 15 minutes and the system automatically cools back to base temperature
  • Up to 28 RF and 96 DC connections on a single sample puck
  • Ideal solution for multi-user facilities since different experiments can be prepared in multiple sample pucks
  • Patented loading concept allows for safe and easy operation.

SampleProtect system secures against ESD

SampleProtect enables grounding or bias of samples during sample exchange to safeguard your experiments. It provides users with a method of protecting sensitive samples from accidental electrostatic discharge (ESD).

  • High quality, fully earthed cables for low level signals:
    Low noise
    High attenuation shielding 
  • Low cross-talk 

BNC or Twinax option.
24 connectors and 12 twisted pairs.

    Customised Magnets
    Beyond standard offering, our in-house team can design bespoke magnets to meet your experimental needs. Full FEA and electromagnet modelling capabilities ensure the integration of the magnet to the system is robust in terms of both magnet and system performance.

    Solenoid magnets

    • Range of field strengths from 1 T to 14 T
    • Central field omogeneity of 0.1 % over 10 mm D.S.V across the range
    • High current, low inductance designs reducing conductor thermal mass and improving cool down times
    • Persistent mode operation < 0.01 % hr-1 as standard
    • Large bore sizes from 77 mm to 150 mm diameter across the standard solenoid magnet range
    • Typical ramping times of < 1 hour from 0 to rated field.

    Vector rotate magnets

    • Three axis vector magnets with a vertical field up to 9 T and a horizontal field up to 3 T
    • Driven magnets as a standard with no persistent switch
    • Typical ramp rates of 0.25 T/min
    • 90 mm large bore across all field vector rotate options
    • Typical tilt at 2.5 degrees for the maximum field axis e.g. 6-2-1 gives 6 T vector modulus, full rotation about the Y axis
    • Full spherical rotation at the lowest rated axis e.g. 6-2-1 gives 1 T vector modulus, full rotation in a sphere about any axis or combination.
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