Ex-'i' intrinsic safety proofing tool
by Dipl.-Ing. Martin Krämer

ispark software support transition:
in march 2021 PTB retired from ispark software project giving
back all intellectual and commercial rights to me as the sole
ispark software author and producer.
As a result, some rearrangements with sales and support were
necessary.   

new ispark software key:
A most up-to-date Sentinel USB key is enclosed now with ispark
software licenses. This strongly reinforces ispark software
applicability with coming Windows OS versions, particularly no
proprietary drivers and no installation procedure is needed any
more.

For further information:
please contact:  ispark@t-online.de