How is your ESP32 board powered.If powered by USB, then power the sensor (red wire) from a 5volt pin of that board.You just need to drop the signal output voltage (yellow wire) with a divider (two resistors) to <=3.3volt.Leo..
...I'm fairly new to electronics. If I were to drive the board and meter with a 9V battery, you're saying to use a voltage divider to provide power to both the board and meter? Would I then use a MOSFET to switch power between the meter and the battery? Thank you!