Principle Of PCAP Design

The typical design principle of PCAP uses mutual capacitance measurement.  AMT adopts self-capacitance measurement instead and can successfully reduce the noise interference caused by liquid.  However, while self-capacitance measurement could avoid false signals, conductive substances in many liquid forms could still affect the touch function. So when operating touch under the influence of liquid, a signal response might still be triggered within the liquid range.

To tackle this problem, our R & D team performed meticulous adjustment on the  structure, hardware, as well as firmware of PCAP touch buttons.  We are happy to share that conductive substances in liquid no longer cause problems for our touch button products!  When there is liquid on the surface of the PCAP touch buttons, the touch operation can still be performed like normal!

Water Resistant PCAP Touch Button

AMT water-resistant  PCAP touch buttons are great for bathroom control panels. One-finger operation is possible when water, detergent, or soapy water is sprayed on the PCAP touch product.  Furthermore, AMT PCAP touch buttons can work with 2.8mm cover glass, support up to 22 keys, and we can add LED indicator lights based on customer needs.

Check Out Our New Design At Embedded World 2022!

Our long-term partner SCHURTER will be exhibiting at embedded world 2022 from June 21^st to June 23^rd at the Nuremberg Exhibition Center (Hall 1, Booth 1-458) in Nuremberg, Germany. You are invited to check out our demo kit, showcasing AMT’s water-resistant PCAP touch button. Go ahead and experience it in person!

AMT PCAP touch solutions have been used in many circumstances with possible liquid interference: outdoor facilities, marine equipment, and medical devices.  If you foresee liquid interference in your system or application from any form of liquid, contact AMT, we can provide you with the ultimate water-resistant solution!