Place of Origin: China Brand Name: Winsen Model Number: MH-Z19B The MH-Z19B carbon dioxide gas sensor (infrared CO2 sensor) is a general-purpose smart small sensor that uses the principle of non-dispersive infrared (NDIR) to detect CO2 in the air, with good selectivity, no oxygen dependence, and long life. Built-in temperature compensation; also has serial output, analog output and PWM output, easy to use. The sensor is a high-performance sensor that combines mature infrared absorption gas detection technology with precise optical path design and sophisticated circuit design. Specifications Sheet Warm-up time 3min Response time T90 120s Working temperature -10??50? Working humidity 0?95%RH (non-condensing) Weight 5 g Lifetime 5 years