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Diacell® CryoDAC-Nitro

Optical spectroscopy, Pmax = 50 GPa, Tmin = 77 K, WD = 11 mm, A = 52°

Diacell® CryoDAC Series

  • Small diameter DAC particularly suited for mounting in liquid nitrogen cryostats where the radial space is reduced
  • The Diacell® CryoDAC-Nitro can also fit many other cryostats of bath, top-loading or close-cycle types. Custom made interface block are designed upon request.
  • Gas membrane driven DAC, allowing the pressure change whilst the sample is at low temperatures
  • Maximum pressures of up to above 50 GPa may be obtained with the Diacell® CryoDAC-Nitro

SKU: A69000

For more info, quotation or call: Contact us


The Diacell® CryoDAC-Nitro was designed to fit into many other cryostats of bath, top-loading, and closed-cycle types. It is supplied complete with a customised chrome-plated copper mounting block. The gas membrane mechanism drives the cell and may be pressurised by any permanent gas. For low temperature use, however, helium is recommended. As the temperature is lowered from room temperature, helium gas contracts rapidly but may still be used to drive a membrane.  The GM Controller is fitted with a relief valve to protect against possible loss of coolant. The CryoDAC-Nitro is especially suitable for use with liquid nitrogen cryostats.

One of the problems with cryogenic use of DACs is that the diamond anvils fall off quite easily if they are fixed in with epoxy resins and other glues. Therefore Almax easyLab uses a design unique to Diacell. The diamonds are supplied in force-fitted metal rings that are fixed mechanically to the tungsten carbide supporting plates, making the assembly robust at low temperature.

This cell is 29 mm from front to back (excluding the inlet tubes). The body is 34 mm diameter, and the membrane retaining ring 38 mm diameter. The Diacell® CryoDAC-Nitro membrane is driven with use of the Diacell® GM Controller which contains also a silicon-based pressure sensor and a digital pressure display.  Everything needed (valves, lines and couplings) is supplied with the unit, with the exception of the gas cylinder and its regulator head (for helium use a high-pressure reduction head is recommended).

Note: If the diamond anvil cell is to be used a low temperature, a low temperature relief valve will need to be fitted on the gas line. This low temperature relief is available from Almax easyLab alongside our GM or iGM controllers option.


The Diacell® CryoDAC-Nitro is particularly suitable for optical measurements within liquid nitrogen cryostats.


Cell Material High Strength Beryllium Copper Alloy
Anvil Support Plate Beryllium Copper Alloy
Pressure Mechanism Gas Membrane
Maximum Pressure 50 GPa
Temperature Range 77 K
Top Angle Conical 52º
Bottom Angle Conical 52º
Lateral Access 12º of 2 theta is accessible
Heating N/A
Cooling Via Cryostat
DAC Diameter 38 mm
DAC Height 29 mm
Working Distance to Sample 11 mm
Numerical Aperture 0.44
DAC Weight 200 g

Maximum pressure is dependent upon the culet size of the anvils. Almax easyLab is committed to its policy of continuous improvement. Specifications may change without notice. easyLab and Diacell are registered trademarks of Almax easyLab.


We have compiled a series of technical documents (brochures, articles, technical drawings, …) which you might find useful to help you understand this product better.

Technical documentation

Brochure CryoDAC-Nitro

Technical Drawing

Please contact us for further details on the engineering drawings.


Spares, Accessories and Options

Our diamond anvil cells are aligned and mechanically tested before leaving our factory on their way to your laboratory.

They also come supplied with the required basic tooling, including gasket blanks, to use them. All is contained in the transportation casing to move around laboratories easily.

Below you can find some of the accessories and spares you might also consider. If you cannot find what you need, please do not hesitate to contact our team.

Diamond anvil fitted in ring Diamond Anvil
3.1 mm Diacell® design diamond anvils, fitted in BeCu rings for easy fitting in the CryoDAC-Mega
Product code: [P00131], [M50003]
Gas Membrane
Stainless steel Gas Membrane suitable for the CryoDAC-Nitro
Product code: [A76030]
Cryostat Holder
Customised chrome-plated copper mounting block for the LN2_DAC system
Product code: [P02192]
Gasket Blanks
BeCu gasket blanks, 10mm diameter; 0.25mm thick
Product code: [P01314]


What is the maximum pressure I can achieve with the CryoDAC-Nitro and a given culet size?

Culet size (µm) 200 300 400 500 600 800 1000
Pmax (GPa) (*) N/A 48 31 20 14 8 5

(*) The Pmax values are only indicative. The maximum pressure achievable with a DAC is influenced by many others experimental parameters, like the gasket characteristics (material, thickness and hole size) or the pressure transmitting medium.

Can one use the CryoDAC-Nitro for high pressure gas loading?

No, or at least not very easily as this is due to the absence of clamping screws in this diamond anvil cell. An alternative solution is the Diacell OmniDAC-LT.


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