Comparison Philips Sonicare 3100 Series HX3671 vs Philips Sonicare 2100 Series HX3651

The presence of a pressure sensor in the device — a sensor that monitors the force with which the working nozzle is pressed against the teeth/gums.

This feature is primarily found in toothbrushes, including those that are part of flossing system units (as discussed in the "Type" section), but it can also be included in irrigators. Its primary function is to prevent potential harm to the teeth and gums caused by excessive pressure during brushing. The sensor's response can vary from one device to another; some devices emit a warning signal, while others reduce the bristle movement speed, and some may even shut off entirely in response to excessive pressure.

Having a pressure sensor in such devices can be beneficial not only for individuals with healthy teeth but also for those with heightened sensitivity or gum issues. It's a highly desirable feature for maintaining oral health. However, it's important to note that in many models, the pressure sensor is not integrated into the main body of the device but is instead part of the replaceable nozzle. Additionally, not all complete nozzle options may have this function, so it's essential to verify these details separately when choosing a device.