Fluids and gels
Any conductive substance that comes into contact with the touch surface has a chance of registering as a touch signal. Fluids and gels are the most common substances to accidentally contaminate the touchscreen and trigger unwanted touch events. The PCAP touch solution must be able to differentiate and filter these events.
Medical personnel will wear one or more layers of gloves. The PCAP touch solution must be able to sense a finger signal through this intervening insulation.
High-frequency electrical noise interference
Medical devices will frequently share a space with other machines and sources of electromagnetic radiation. The PCAP touch solution must be able to filter this interference from actual touch signals.