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  • Hermetics

    Secure data transmission
    for satellite tests under space conditions

    What are Positronic Hermetics

    Positronic Hermetics is a flange with circular feedthroughs and D-Sub connectors adapted on both sides, which is required for the thermal vacuum chamber. In such a chamber, the environmental conditions in space are simulated (pressure and temperature) and the satellites are tested for various functionalities, which must be monitored electrically for optimum data protection. A connection is made to the satellite with the actual connectors on the satellite, whereby the cables must be routed out of the chamber. This is done via the flange, which uses a special sealing process using a NASA-approved epoxy resin.

    The D-Sub connectors used are designed to withstand the conditions in the thermal vacuum chamber and thus ensure reliable data transmission. It is important to note that one flange is always required per satellite.
    ACS temperature vacuum chamber for testing satellites - Image courtesy of Angelantoni Test Technologies Srl
    https://www.acstestchambers.com

    PERFORMANCE FEATURES AND
    ELECTRICAL PROPERTIES

    Performance features

    Isolation resistance:
    Proof voltage:
    Hermeticity:


    Temperature range:
    5 G-Ohm
    750 Volt
    < 5 x10-9 mbar.l/s mbar.l/s under a vaccum of 1.5 x 10 1,5 x 10-2 mbar
    -55 °C bis +80 °C

    Electrical characteristics at sea level

    Nominal impedance:
    Frequency range:
    VSWR:
    Insertion loss:
    Operating voltage:
    Dielectric withstand voltage:
    Insulation resistance:
    50 Ohm
    0 - 18 GHz
    10 + 0,01 x F(GHz)
    0,30 x √F(GHz)
    500V RMS max. (Current leakage 2mA max.)
    1000V RMS max. (Current leakage 2mA max.)
    5 G-Ohm min. bei 500V DC Between center contact & outer contact.

    Performance features

    Isolation resistance:
    5 G-Ohm

    Proof voltage:
    750 Volt

    Hermeticity:
    < 5 x10-9 mbar.l/s mbar.l/s under a vaccum of 1.5 x 10 1,5 x 10-2 mbar

    Temperature range:
    -55 °C bis +80 °C

    Electrical characteristics at sea level

    Nominal impedance:
    50 Ohm

    Frequency range:
    0 - 18 GHz

    VSWR:
    10 + 0,01 x F(GHz)

    Insertion loss:
    0,30 x √F(GHz)

    Operating voltage:
    500V RMS max. (Current leakage 2mA max.)

    Dielectric withstand voltage:
    1000V RMS max. (Current leakage 2mA max.)

    Insulation resistance:
    5 G-Ohm min. bei 500V DC Between center contact & outer contact.

    Would you like more information about
    about our Hermetic products and solutions?

    Hermetics Productrange

    The redundant features of the connectors allow both sides of the connection to be mounted in the direction of the vacuum. The materials and surfaces as well as the technical properties of the connectors comply with the MIL-DTL-24308, Goddard and SPACE-D32 specifications.

    Would you like more information about our Hermetic solutions and the associated products?

    If you would like general information about Hermetics and the associated products, please contact our team directly or arrange a callback.

    Do you have a specific query about
    Hermetics or the individual products?

    If you require hermetics for one of your projects, the individual products or would like advice on the technology with regard to certain specifications, we will be happy to offer you a solution in person.