The VP-53S is Rion’s magnet attachment for mounting piezoelectric accelerometers (M6-thread models) onto ferrous surfaces without drilling or adhesive-only mounting. It attaches to the accelerometer via an M6 screw hole and adheres to the test surface, allowing quick, repeatable placement for machinery and structural vibration measurements. Note: bonding is adhesive-based and rated for use between -50°C and +160°C.