Micromachined conductometric p(CO2) sensor

Abstract A novel micromachined conductimetric p (CO 2 ) sensor is proposed. The p (CO 2 ) measurement can be linearised with the theoretical formula: G th ( μS )= 0.055( μS cm −1 )+1.45( μS cm −1 ) p( CO 2 ) ( mmHg −1 ) cell const ( cm −1 ) The sensor design and evaluation is described. The linear behaviour was checked over the physiological ranges of p (CO 2 ): 0–80 mmHg. The time response is in the range of 5 s. The dimensions allow its mounting in a French 5 catheter. Its advantage as compared with the traditional Severinghaus device is the simplicity of construction.