Trade fair  /  May 10, 2022  -  May 12, 2022

SENSOR+TEST

Starting with the two most commonly measured variables, pressure and temperature, the diversity of process sensor and measurement technology has always formed the core of SENSOR+TEST. With the widespread introduction of digitalization also in process automation, the requirements for sensors and measuring systems have grown just as strongly as their importance for the industry. Whether newly developed measurement methods, self-monitoring sensor networks or systems for process analysis with cloud and AI support: The miniaturized sensor concepts of Fraunhofer IKTS based on ceramic technologies provide valid information even in harsh environments and along the entire value chain.

Hall 1 Booth 244

 

Highlights

Screen-printed customized ultrasonic transducers

High frequency ultrasonic transducers are used in metrology, imaging and monitoring as well. Piezoceramic thick films enable complete fabrication by printing processes. Thus, even complex structures like linear or annular arrays can be printed including wiring and additional functional layers. Therefore, low sintering piezoceramic materials have been developed which are compatible with a wide range of ceramic and metallic substrates. The sintered monolithic compounds have high mechanical, chemical and thermal robustness for application in harsh environments. In addition, they are compatible to surface-mount technology.

Blog: New technology approaches for the manufacture of ultrasonic transducers

 

Printed magnetoresistive sensors for contactless switching

Printed electronics have emerged as a key technology in many industries. Using low-cost, widely available materials and industrially relevant high-throughput processes, Fraunhofer IKTS is able to print flexible magnetoresistive sensors for contactless switching. With the novel printed switches, there could soon be a marketable solution that enables exactly this and can be flexibly applied both in harsh environments and under ionizing radiation, e.g. in medical diagnostics and therapy.

 

Sensor development for harsh enviroments

Sensor elements are the fundamental components for wide-ranging data collection of process and state variables in the ongoing trend in Industry 4.0. Therefore, these elements must withstand increasingly challenging process conditions like temperature sensors for turbines, sensors for chemical atmospheres in electronic productions or corrosive-stable soil sensors in smart farming.  Based on the long-term experience in the development of mechanical, chemical and temperature sensors, IKTS offers comprehensive experience as well as appropriate equipment for development, production, and characterization of almost all type of sensors. Main working topics are the development of customized metallizations (e.g. acid-resistant thick films), temperature and temperature cycling stable multilayer sensors (e.g. LTCC pressure sensor, hermetical housings) and adapted interconnection technologies (e.g. brazing, micro-welding).

 

Gas sensors in ceramic technology

Fraunhofer IKTS provides various gas sensors for the detection of O2, CO2, H2, CH4, NH3 as well for other gaseous species. They can be adapted to the most varied operating conditions by selecting the right measuring approach, sensor design and operating parameters.

The determination of CO2 concentration in gas mixtures is important in many application areas: in the control of growth processes in biotechnology, for indoor air and pollutant monitoring in industry and agriculture. The miniaturized CO2 sensor developed at IKTS can currently gain a particular importance for the mobile medical care of patients suffering from COVID.

Amperometric oxygen sensors based on Yttrium-stabilized zirconium oxide developed at IKTS can be used, for instance, for oxygen determination in a measuring range up to 90 vol. %. Potentiometric sensors, based on the principle of mixed potential formation and allowing detection of free oxygen, can be proposed for the determination of oxygen in carrier gases with combustible components (CmHn, H2).

The detector on the basis of thermal catalytic surface ionization (TKOI), which has sensitivity to chlorinated hydrocarbons (CHCs) comparable to that of the ECD, has been developed to the prototype stage, validated and is in operation.

Besides the successful development of various types of gas sensors, Fraunhofer IKTS has many years of know-how in the integration of sensors into housings and  in the development of materials and functional layers for applications in printed electronics and sensors.