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IEPE Sensor Conditioner with Galvanic Separation


  • Galvanic isolation between input and output side and to the supply region
  • Adjustable IEPE supply
  • Voltage and current output
  • Integrated detection of whether the input is shortcircuited or open: Signals errors at the voltage and current output, if necessary, as well as optically via status LEDs
  • An additional DC offset can be activated at the voltage and current output to communicate to the measurement system that the measurement chain is in operation.
  • Excellent EMC characteristics
  • Suitable for long cable lengths of up to several hundred meters
  • Ideal for use with IEPE sensors and IEPE charge amplifiers
  • Compatible with standard measurement technology

The GIA-IEPE Iso­la­tion Am­pli­fi­er as Part of the Mea­sure­ment Chain

When mea­sure­ment sig­nals can­not be pro­cessed di­rect­ly by the data ac­qui­si­tion hard­ware, mea­sure­ment am­pli­fiers are re­quired to con­vert the sen­sor sig­nals. Here, gal­van­ic iso­la­tion be­tween the mea­sure­ment sig­nal and the ac­qui­si­tion hard­ware is cru­cial, as this pre­vents in­ter­fer­ence.

The IfTA GIA-IEPE (Gal­van­i­cal­ly Iso­lat­ed Am­pli­fi­er) is an iso­la­tion am­pli­fi­er with ad­justable IEPE input and gal­van­ic iso­la­tion.  For ev­ery­day use, this means high trans­mis­sion qual­i­ty of the sig­nal even over long dis­tances, safe­ty thanks to gal­van­ic iso­la­tion, and time sav­ings thanks to a lean mea­sure­ment chain that is less sus­cep­ti­ble to er­rors.

The IfTA GIA-IEPE is ideal for use with IEPE sen­sors as well as for retrofitting mea­sure­ment chains if the ex­ist­ing mea­sure­ment sys­tem does not offer IEPE feed­ing. IEPE is an in­dus­try stan­dard also known as ICP, CCLD, Isotron, Delta­tron, or Piezotron. The mod­ule can be com­bined with both sen­sors and charge am­pli­fiers that re­quire IEPE sup­ply. At the same time, the clean gal­van­ic iso­la­tion avoids dam­age and in­ter­fer­ence.

The GIA-IEPE can also be used in combination with a charge amplifier that requires an IEPE supply, e.g. the IfTA Charge Amplifier for high temperature sensors.

  • Up to 100 m IEPE sup­ply (from sen­sor resp. charge am­pli­fi­er to GIA-IEPE input).
  • Up to 1000 m with cur­rent as out­put sig­nal (from the GIA-IEPE out­put to mea­sure­ment sys­tem).

Ad­van­tages of the Iso­la­tion Am­pli­fi­er IfTA GIA-IEPE


The GIA-IEPE can be fed with 7 to 36 VDC volt­age. In ad­di­tion, the IEPE sup­ply can be ad­just­ed to match the sen­sor. This makes the mea­sure­ment am­pli­fi­er uni­ver­sal­ly ap­pli­ca­ble.


The GIA-IEPE in­te­grates a volt­age and cur­rent out­put. A DC off­set can be ac­ti­vat­ed on the volt­age and cur­rent out­puts in order to in­form the mea­sure­ment sys­tem that the mea­sure­ment chain is in op­er­a­tion. Without off­set, it is not pos­si­ble to dis­tin­guish whether the mea­sure­ment chain is faulty or whether there is ac­tu­al­ly no input sig­nal.


Thanks to the strong IEPE supply, the GIA-IEPE allows a cable length up to 100 m on the IEPE supply side and up to 1000 m on the voltage output side.


The GIA-IEPE am­pli­fi­er is gal­van­i­cal­ly iso­lat­ed be­tween its input and out­put cir­cuits, in­clud­ing the as­so­ci­at­ed power sup­plies. This en­sures that there is no con­duc­tive path be­tween the input and out­put sec­tions, which in turn means safe­ty for op­er­a­tors and equip­ment.


Short cir­cuit and cable break on the input side are au­to­mat­i­cal­ly de­tect­ed and re­port­ed by a de­fined out­put sig­nal and sta­tus LEDs.


Due to the mod­u­lar am­pli­fi­er con­cept, in­di­vid­u­al ad­just­ments can be made cost-ef­fi­cient­ly.


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