Angst+Pfister releases long-life digital oxygen sensor for AM systems

May 25, 2022

Angst+Pfister Sensors and Power have released a new oxygen sensor for metal, ceramic and polymer Additive Manufacturing (Courtesy Angst+Pfister)

Angst+Pfister Sensors and Power, Zürich, Switzerland, has developed a new type of oxygen sensor for the metal, ceramic and polymer Additive Manufacturing processes. The new long-life digital oxygen sensors and sensor modules for AM offer ppm signal resolution and no cross influence from most other gases.

A complex combination of long exposure times at low oxygen concentration, together with process generated gases that influence the response of the oxygen sensor, can cause problems, explains Angst+Pfister. While the build chambers are gas tight in order to reduce argon or nitrogen, consumption, this means that certain process-generated gases cannot escape the build chamber. Humidity control – be it for the powder bed itself, powder canisters and/or the chamber walls – is another parameter influencing the performance of certain types of oxygen sensors.

Angst+Pfister’s new sensor is a weak acidic electrolyte electrochemical sensor, which enables a long operational lifetime and less cross influence from other gases such as, but not limited to, hydrogen and other reducing gases. Two versions of the sensor are available, one is a 0-25% O2 type with a signal resolution < +/-30 ppm O2 and the other sensor is a 0-10,000 ppm O2 sensor with a signal resolution of +/- 1 ppm O2. The sensors have a M16 x 1 mm thread for process integration.

The combination of the 0-25% O2 PO2ES-103PD oxygen sensor and the 0-10,000 ppm O2 P-41AGWD oxygen sensor makes process and safety control in various Additive Manufacturing processes.

The signal output is controlled by specially designed electronics that are protected in an enclosure with EMC and IP65 protection. The output signal from the conditioning electronics is RS485 Modbus (optional 4-20 mA), enabling easy integration into a central PLC unit. The cable length between the electronics and the PLC unit can be chosen arbitrarily long, the cable length between the sensor and the conditioning electronics is 50 cm (maximum 100 cm).

In the latest issue of Metal AM magazine

Download PDF

Extensive AM industry news coverage, as well as the following exclusive deep-dive articles:

  • Separation anxiety: Lessons learned at NASA from a developmental rocket engine failure
  • What is 'good' metal AM? Exploring the industry's value metrics for production
  • An inside perspective on China’s thriving metal Additive Manufacturing industry
  • Additive Manufacturing for jewellery and watchmaking: Exploring the potential of sinter-based technologies
  • Metal Additive Manufacturing for digital dentistry: An introduction for dental professionals
  • Case study: The development of a multi-material heat sink by Additive Manufacturing using Aerosint technology

The world of metal AM to your inbox

Don't miss any new issue of Metal AM magazine, and get the latest industry news. Sign up to our twice weekly newsletter.

Sign up

Discover our magazine archive…

The free to access Metal Additive Manufacturing magazine archive offers unparalleled insight into the world of metal Additive Manufacturing from a commercial and technological perspective through:

  • Reports on visits to leading metal AM part manufacturers and industry suppliers
  • Articles on technology and application trends
  • Information on materials developments
  • Reviews of key technical presentations from the international conference circuit
  • International industry news

All past issues are available to download as free PDFs or view in your browser.

Browse the archive

Looking for AM machines, metal powders or part manufacturing services?

Discover suppliers of these and more in our comprehensive advertisers’ index and buyer’s guide, available in the back of Metal AM magazine.

  • AM machines
  • Process monitoring & calibration
  • Heat treatment & sintering
  • HIP systems & services
  • Pre- & post-processing technology
  • Powders, powder production and analysis
  • Part manufacturers
  • Consulting, training & market data
Download PDF
Share via
Copy link
Powered by Social Snap