The ability to analyse H2, CH4 and CO2 provides physicians with necessary information to confidentially diagnose carbohydrate malabsoroptions and/or small intestinal bacterial overgrowth (SIBO). The BreathTracker SC analysers trace-gas concentrations of hydrogen (H2), methane (CH4) and carbon dioxide (CO2) in a patients alveolar breath sample using solid-state sensors. The results are measured and displayed in parts per million (ppm) for H2 and CH4 and percent (%) for CO2. The BreathTracker SC also utilise an added feature for sample contamination detection and correction based on CO2 measured in patient samples.