Greisinger digital manometer including sensor gmh 3181 xx series greisinger gmh 3181 13 the greisinger gmh 3181 13 is a digital manometer including sensor for measuring the overunder pressure and pressure difference 100 2000 mbar or 2500 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 instrument with inte