The CMCbt is a Bluetooth Current Meter Counter that provides an interface between any rotating mechanical Current Meter and a user interface such as the HydroTab Application running on a Samsung Galaxy Tab Active. The CMCbt is also used to totalise the number of tips when used in conjunction with the Field Calibration Device and the FCD_APP calibration software on a samsung galaxy or a smart phone. The CMCbt is similar to the CMCsp, PVD100 and PVD200 except it doesn’t have an LCD display – so all settings and operation must occur through the Bluetooth interface.