A pump (10) includes a canister (20) for collecting fluids from a negative pressure wound therapy bandage (34) in which the canister (20) incorporates both tilt (39) and fill (38) sensors operatively connected to a microprocessor (51) to control the operation of the pump (10) in drawing fluids from the negative pressure bandage (34). The fill sensors (38) include a pair of spaced sensor pins that convey a filled signal when fluid within the canister (20) interconnects the two sensor pins. The tilt sensor (39) is housed within the pump housing (12). The canister (20) is also formed with an optical sensor (30) that provides an indication of proper alignment of the canister (20) on the pump housing (12). The optical sensor (30) includes a reflector (33) in the canister (20) that reflects an infrared light emanating from the pump housing (12). When the light reflection is received properly within the pump housing (12), the canister (20) is properly aligned and mounted on the pump housing (12).
