The MH-Z9043P is a residential-grade methane sensor that utilizes Tunable Diode Laser Absorption Spectroscopy (TDLAS) for detection. Featuring an internal reflective optical path design, it offers excellent gas selectivity, immunity to oxygen interference, and a long service life. It incorporates temperature control and compensation algorithms, along with redundant safety measures, to ensure accurate, long-term methane monitoring. Equipped with a serial output interface for ease of use, this high-performance sensor seamlessly integrates mature laser absorption detection technology with a stable optical path and circuit design.