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Diacell® iGM Controller

Intelligent pneumatic pressure controller and indicator for gas membrane DACs

The Diacell® iGM Controller employs a fully digital control technology to provide stability and high slew rate when varying the gas pressure in the gas membrane of diamond anvil cells.

It enables the selecting of gas pressure targets, minimum and maximum pressure limits, specific pressure variation slew rates as well as more complex pressure profiles.

The Diacell® iGM Controller is a truly automated gas membrane controller which is particularly suited to experiments where the gas pressure needs to be controlled actively over long periods of time, such as in synchrotron beamlines, for example.

iGM Controller A75013

The unit comes with RS232, IEEE, Ethernet and USB ports as standard.  The front panel digital touch screen is high resolution VGA.

The system can be controlled remotely with our advanced control and acquisition software the Optiprexx High Pressure Manager. HPM is a standalone Labview program running as excecutable (.exe) and does not require a Laview Licence. Note that HPM is an additional option when the iGM is supplied on its own.  

Low temperature gas membrane cells in addition require the GM Controller Relief Valve Option [A75011] for safe operation.

Almax easyLab makes extensive use of gas membranes to drive cell pistons in our Diacell® range of DACs.  These can be ordered at

A gas membrane is rather like a motor tyre with one very thin wall.  When pressurised internally, this wall bulges.

Advantages of this type of drive include the ability to apply very small incremental loads, remote operation, and the achievement of higher pressures due to absence of friction associated with bolts.  Almax easyLab are able to supply both additional gas membrane drives and control boxes, as listed below:

Gas Membrane A76010: - Drives the Bragg-(G) series, the HeliosDAC and the μScopeDAC-RT(G)

Gas Membrane A76020: - Drives the OptiDAC and OmniDAC cells.

Gas Membrane A76030: - Drives the CryoDAC-Nitro
Gas Membrane A76040: - Drives the μScopeDAC-HT(G) cells.


Pressure Range 0-70, 0-100, 0-150, 0-210 bar
Over Range 10% above full scale
Pressure Media Dry, non-corrosive, oil free; He, Ar are best
Accuracy; Precision Up to 0.02% Rdg
+ 0.02% FS
Accuracy; Stability Control up to 0.005%FS
Weight 12.5 kg
Dimensions 440mm x 88mm x 320mm
Connectivity RS232, IEEE, Ethernet and USB as standard

easyLab is committed to its policy of continuous improvement.
Specifications may change without notice.
easyLab and Diacell are registered trademarks of easyLab Technologies Ltd.