PTZ, PT, or T type calculations are available with the MacBAT 5 corrector. The device has an internal battery and the ability to connect to an external power source. The gas volume measured by the rotary, turbine, or ultrasonic gas metres is converted to base conditions using MacBAT 5. The algorithms SGERG-88, AGA92-DC, AGA8-G1, AGA8-G2, AGA NX-19-mod, or a predetermined compressibility factor value are used to calculate the gas compressibility factor. It is possible to instal the inherently safe MacBAT 5 in Explosion Hazard Zone 0.