LIQUID-LEVEL-CT-REF

ルネサス静電容量タッチキーソリューションを応用した1チャネルの自己容量電極と1チャネルのシールド電極で水位計測を行うリファレンスデザインです。電極と液体タンクを導体でGNDシールドする必要がありますが、自己容量電極1チャネルでリニアな値を計測することができます。

Problems with conventional water level measurement technology (float type, weight sensor) are solved with Renesas' Capacitive Sensor Application Reference Design. When considering water level detection via float, many physical components are susceptible to damage due to fatigue and deterioration of parts, due to high costs. Additionally, when considering water level detection via a weight sensor, high costs can be incurred due to sensor elements and peripheral circuits.

With Renesas' water level measurement, parts are virtually free from fatigue and wear and tear; they are very hard to break. For systems that use a microcontroller, replacing the microcontroller and adding electrodes is all that is needed, and the cost to do this is low. Finally, touch key and water level measurement can be achieved simultaneously.