The MacREJ 5 Data Logger designed for Pressure Reduction stations such as City Gates, CNG stations, Power Plants or Petrochemicals. Registers parameters such as inlet and outlet pressure, volume, flow, temperature, energy; monitors in real time the pressure reduction system and supervises the security units. MacREJ 5 is designed to operate in explosive zone 0. In battery mode, the transmission of recorded data is available according to the scheduled time or with the activation of emergency alarms. The connection of the external power supply allows access to data remotely in real time.