Traditional touch sensors technologies include capacitive, resistive, infrared touch and surface acoustic wave. However, moisture, changes in surface temperature or materials or other surface variations can prevent these sensors from detecting the proper pre-determined threshold to trigger a touch event. For example, capacitive touch technology in a cell phone can be ineffective when your finger is damp.
A new touch sensor from AlSentis measures the actual touch event signature and in conjunction with proprietary electrode geometries potential interference from EMI, moisture and surface contaminants is eliminated. The HSS sensor can even distinguish between a glove touch and a bare finger touch.
For more information about AlSentis HSS touch sensor and demo boards, click here.