Primary Field Lab (PFL) program

We are currently looking for partners to help us develop, evaluate and verify our flagship model Cri/oFlex® 3. If you are an expert in the quantum field, engaged in design engineering and determined to shape the future of the quantum industry, join our mission!

Flexible Cryogenic I/O

Low thermal conductance and scalable cryogenic multi-channel i/o solution using (super)conducting circuits on flexible substrates.

We are dedicated to supply the best hardware for quantum engineers and the industry.

Together with our customers we make quantum technologies a reality.

Delft circuits, hardware for quantum engineers.

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Quantum Computing

Quantum computing architecture creates stringent requirements on i/o for qubit control. The cryogenic cable Cri/oFlex® 2 and Cri/oFlex® 3 series are designed specifically for crowded setups and provide excellent microwave performance.

Quantum Internet

Quantum internet research is developing rapidly and requires  a growing number of SNSPD i/o channels. Our multi-channel flexible cryogenic cable is dedicated for quantum communication applications.


Scanning probes and moving stage experiments at low temperatures have been waiting for ultra-thin cables with excellent RF and cryogenic properties. Check out our flexible cryogenic cable Cri/oFlex® 1 series with an unprecedented footprint.


Cri/oFlex® 1

Ultimate cryogenic flexibility​

Ultra-flexible microwave i/o for scanning probe microscopes and other vibration sensitive instruments. The thinnest and the most flexible cryogenic RF cable allows you to transmit your signal while offering extreme vibrational decoupling.

  • Up to 18 GHz
  • < 125 μW/channel (40K - 4K)
  • Up to 60 cm length
  • Customizable connectors
  • < 1 mm Bending radius
  • Single channel
  • UHV compatible

Cri/oFlex® 2

The new cryogenic microwave standard

Single channel microwave i/o for densely-packed sample spaces in the refrigerators. Simple installation, small form-factor and reduced thermal loads, allow an increased number of microwave lines in cryostats. This flexible cryogenic cable is a new standard.

  • Up to 26,5 GHz
  • < 250 μW/channel (40K - 4K)
  • Up to 100 cm length
  • Customizable connectors
  • 2 mm Bending radius
  • Single channel
  • Ultra durable

Cri/oFlex® 3

Massively scalable cryogenic i/o

Massively scalable multi-channel flexible RF cable for refrigerators, optimized for quantum computing applications with built-in on-flex filtering for signal conditioning.

  • Up to 10 GHz
  • < 125 μW/channel (40K - 4K)
  • Up to 100 cm length
  • Customizable connectors
  • 5 mm Bending radius
  • 8 Parallel channels
  • Integrated filters

Case study highlights

Scaling Up SNSPD Readout

The primary goal was reading out a 16 SNSPD setup in a compact fridge using multi-channel i/o. This is the first stepping stone to scaling up to and beyond a 64 SNSPD setup. The system required going in a straight shot from room temperature, through the vacuum barrier, down to 3K at the chip holder where the dectector is located…

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Download Cri/oFlex® 2 Datasheet