TPI 608BT Digital Manometer with BluetoothView LIVE readings on the TPI View App. Details below! Perform Manual or Automatic Let By Tightness Tests Colour coded Outside Permissible Leakage Tolerances of 0. 25 mBar for Pipework Only Testing View Initial Test Value & Current Value simultaneously, whilst carrying out the tests View Initial Test Value, Final Test Value & the Differential Value at the end of each test Serial No. visible in app & on reports Allocate a unique reference to each