S4C-FS Service App is used by service people to check sensor readings, perform settings. 
It uses Bluetooth Low Energy (BLE) to communicate with sensors.
Features:
* Show Online values: 
  - Flow
  - Velocity
  - Pressure
  - Temperature
* Perform Settings:
  -  Flow Settings
  -  Units Settings
  -  Reference Conditions
  -  Factory Settings
  -  Counter Settings
  -  Output Settings