No, you really do not need a stand-alone system to check for caps. There are a couple ways to go about this, depending on what your priorities are. If you are only concerned with cap and fill level, you can integrate a smart camera (or a PC-controlled camera) into your existing filling equipment. We have experience with producing integrated solutions, and are happy to lend our expertise and equipment in setting something up. You can find out more about our custom solutions by contacting us or visiting our custom solutions page.