WIKA Ultra High Purity Transducer (iWU-20, iWU-25, iWU-26)

For hazardous areas, Ex ia IIC


  • Semiconductor, flat panel display and photovoltaic industry
  • Ultrapure media and special gas systems (gas sticks, gas panels, bulk-gas supply, tank farm installations)

Special features

  • Compact design
  • ATEX and IECEx zone 0 approval
  • Ingress protection IP67 with “side access” zero potentiometer
  • Excellent EMC stability
  • Active temperature compensation

Sales Contact (Wika.sales@asyatrafo.com)





With its small footprint the iWU-2x is the most compact UHP transducer in the market. Thus it is optimally suited for installation in applications with limited mounting space and even in existing plants it can be easily retrofitted.


The iWU-2x series combines state-of-the-art digital transducer concepts with analogue-like output signals, in order to provide the safest and most accurate pressure measurement necessary for today’s market requirements.

Pressure measurement, based on a vacuum reference, and electronic measures for interference shielding and for signal noise cancellation ensure high-accuracy pressure measurement and excellent long-term stability.

Active temperature compensation reduces the impact of changing temperatures on the transducer, allowing safe operations even in applications with high fluctuations in temperature (e.g. Joule-Thomson effect in the case of gas expansion) or in non-air-conditioned areas.

iWU-25 (flow through) and iWU-26 (surface mount) transducers are specifically designed to sustain torsionapplied stresses often incurred during installation. The special design of the thin-film sensor eliminates the risk of sensor failure due to loads at the process connection or welded joints.


The iWU-2x transducer can be readily installed in indoor or outdoor systems as well as in non-flammable or potentially flammable areas. The hermetically IP67 sealed “side access” zero point setting ensures ingress protection at all times of operation.

The iWU-2x series was developed for pressure measurement in Ex zone 0 applications. The temperature class T4 allows usage with most speciality gases under explosion protection considerations.