A device, and method for use of the device, is disclosed that optimizes the proper preparation of fresh herbs for culinary or other uses. The tip portion comprises a first portion that is in the acoustic path of the ultrasound transducer, and a second portion that is outside the acoustic path of the ultrasound transducer. By configuring these electrodes in accordance with the present invention, cross-contamination of a single failed flame sense electrode will not affect the other flame sense electrodes’ ability to sense a flame at their associated burner.