Peritron Anal Perineometer. The Peritron Perineometer is the only pelvic exerciser you'll ever need, as it not only measures muscle strength but can help to exercise and improve your muscles. This perineometer comes with an anal sensor which makes it suitable for treating men or women who suffer from faecal incontinence as a result of a weak pelvic floor. It is a highly accurate biofeedback device so that you can feel confident you are getting the right readings when testing the strength of your pelvic floor muscles. And buy this Peritron Anal Perineometer Was £579.99 Now £400.00.