Kubler pneumatic counters count pulses of compressed air which are in-turn shown on a mechanical display, they can be panel or surface mounted. Some pneumatic counters will give an output upon reaching a preset value (pneumatic ‘predetermining’ or ‘preset’ counters), whilst some pneumatic counters simply total the input pulses and display this information (pneumatic ‘totalising’ counters). Pneumatic predetermining counters can be supplied as subtracting (single line display - reducing to zero) or adding (dual line display - one line of display shows the preset and the second line increments the actual count value). Pneumatic counters are intrinsically safe and can be used where no electrical power is available.