Greisinger digital manometer including sensor gmh 3181 xx series greisinger gmh 3181 07 the greisinger gmh 3181 07 is a digital manometer including sensor for measuring the overunder pressure and pressure difference measuring range 10 350 mbar or 350 00 mbar the remarkable zero point stability as well as two measurement ranges ensures that you will always have the optimal measurements by automatically switching between measurement rangesthis handy and sturdy pressure instru