The MacBAT 5 corrector offers calculations of PTZ, PT or T type. The device is powered with internal battery with possibility to connect external power supply. MacBAT 5 converts gas volume measured by the rotor, turbine or ultrasonic gas meter to base conditions. Gas compressibility factor is calculated using algorithms: SGERG-88, AGA92-DC, AGA8-G1, AGA8-G2, AGA NX- 19-mod or by fixed K1 compressibility factor value. MacBAT 5 is an intrinsically safe device, which can be installed in explosion hazard zone 0.