Intuitive operation using a colour touchscreen and the excellent design of the Proofmaster M make this tightness testing device the star in its class. The Proofmaster M tests watches with or without a strap up to a diameter of 70 mm and a depth of 28 mm. The water resistance test takes place according to the deformation principle. Tightness tests can be carried out with up to three different pressures. Possible test pressure of vacuum -0.8 to 10 bar overpressure possible. Measurement resolution is up to 20 nm. The Proofmaster M has a USB port and can be integrated into a network using optional WiCoTRACE software.