SS3128 is a miniature 3-electrode electrochemical CO sensor designed to accurately measure carbon monoxide concentrations from 0 to 2,000 ppm. Its compact design makes it suitable for portable devices and space-limited applications. The sensor provides a linear output of 70 ± 20 nA/ppm and fast response time (T90 < 20 sec), delivering stable and reliable measurements. With a filter capacity over 20,000 ppm-hour and low output drift, it ensures long-term stability and low cross-sensitivity to hydrogen, making it ideal for use in complex environments.