SENDA high speed handpiece SD-401 M4 upgrade notice

1. Zero-Suction

 The air inside the labyrinth structure will be pressured by centrifugal force, then discharge through the back cap, these maintain a fixed pressure inside the head to achieve zero-suction, which effectively reduce cross contamination by preventing blood, saliva, or other bio material drawing back into the handpiece.

2. Constant Pressure Device

 It is equipped with an interior constant pressure device, which effectively prevents damage caused by excessive air pressure during operation. When the air pressure exceeds 0.35MPa, the device will automatically limit the maximum pressure to 0.35MPa. This prevents damage to the bearings caused by an unstable air pressure, and thus, prolongs the handpiece service life.