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