Filter interface for multimodal surgical gas delivery system

A surgical gas delivery system comprising:

• a) a device housing supporting a computer-controlled control unit and a filter interface having a filter cartridge receiving seat;
• b) a filter cartridge having a filter housing defining an interior reservoir, a pair of optical prisms formed integral with the housing and located within the reservoir for sensing a level of liquid within the reservoir, wherein the pair of optical prisms includes a first prism defining a first set point level and a second prism defining a second set point;
• and
• c) a pair of sensors coupled to the control unit for sensing a level of liquid wherein the reservoir of the filter cartridge to prevent fluid contamination of the device housing, wherein an outer surface of the filter housing located proximate the location of the optical prisms is in optical communication with the pair of sensors when the filter cartridge is received by and seated within the filter cartridge receiving seat of the filter interface.