2 Step 2: Connect a Sensor

The MTCH9010 Evaluation Kit supports two sensor input modes: capacitive and conductive.

Based on the selected sensing mode—only one sensor type will operate at a time. While both sensors may be connected, the device will use only the active mode (capacitive or conductive).

Note: The sensor boards are connected by a V-cut and, if needed, can be separated for individual placement.

For capacitive sensing, connect the sensor board to the CAP SENSE header
For conductive sensing, connect the sensor board to the CON SENSE header

Ensure the sensor is fully seated and aligned with the header pins.

The sensor surface should face upward when properly installed.

If switching between sensor types, disconnect power before removing or connecting sensor boards.

Figure 2-1. Connecting Sensor Boards to MTCH9010 Evaluation Kit

Tip: Choose and connect the appropriate sensor.

The choice between capacitive and conductive modes depends on the detected liquid type. Each mode is optimized for different properties, ensuring accurate and reliable detection.

Capacitive mode: Ideal for detecting water, oils, fuels, and alcohol-based liquids by sensing changes in dielectric properties
Conductive mode: Designed for water and ionic liquids, using electrical conductivity for detection

Figure 2-2. Choose Between Capacitive or Conductive