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Renesas Unveils Liquid and Solid Material Detection Solution

Renesas Easy

Renesas Electronics has launched its Material Detection Solution, which detects materials or liquids easily and cost-effectively without sensors, by connecting electrodes using Renesas’ RX130 capacitive touch-key microcontrollers (MCUs).

Replacing the sensors with this electrode approach contributes to lower bill of materials (BOM) costs while enabling detection at multiple points using a single chip. This allows industrial equipment, OA equipment, and home appliance manufacturers to explore detection systems for cost-constrained applications.

Renesas’ touch-key MCUs feature a capacitive touch sensor unit specialized for capacitance measurement with extremely high sensitivity and high noise resistance. This enables the Material Detection Solution to easily detect the presence or absence of a powder such as a vacuum cleaner dust, a liquid such as a refrigerator and coffee maker, or material such as paper by measuring the capacitance between electrodes to the MCU.

Shigeki Kato, Vice President of Renesas’ Enterprise Infrastructure Business Division, Industrial Solution Business Unit, noted, “With our new capacitive touch-based detection systems, customers can expand their sensing function range while taking advantage of reduced BOM cost and improved detection accuracy.”

The Key Features of the Material Detection Solution includes:

  • To achieve sensor-less physical object detection easily and cost-effectively, the Renesas solution connects two thin-film electrodes and measures the capacitance between those electrodes using one of its touch-key MCUs. Changes in the measured materials are determined by detecting the change in capacitance between the electrodes.
  • In addition to eliminating the need for sensor evaluation and operating condition determination, the initialization and sensitivity adjustments can be easily performed using the development support graphical user interface (GUI) tool available for capacitive touch sensor systems. This enables developers to quickly implement a capacitive touch sensor unit in equipment that requires a detection function.

Material Detection Solution comes with design support materials which include:

  • Electrode interface circuit diagrams
  • Sample program
  • Guidelines for the newly implemented detection functions


The Material Detection Solution is available now for free download at Click here.


Jyoti Gazmer

A Mass Comm. graduate believes strongly in the power of words. A book lover who dreams to own a library some day. An introvert but will become your closest friend if you share mutual feelings about COFFEE. I prefer having more puppies over humans.

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