Fangrui Product Details The Gas Chamber Is Gold-plated, Waterproof And Anti- High Sensitivity, Low Power Consumption;excellent Stability Temperature Compensation, Excellent Linear Output Provide Serial Port (uart), Analog (), Pwm Waveform And Other Output Methods Long Service Life;anti-water Vapor Interference, No Poisoning -z14 Carbon Dioxide Gas Sensor (hereinafter Referred To As The Sensor) Is A General Intelligent Small Sensor That Uses The Principle Of Non-dispersive Infrared (ndir) To Detect Co2 In The Air. It Has Good Selectivity And No Oxygen Dependence, And Has A . Built-in Temperature Compensation; It Also Has Digital Output, Analog Output And Pwm Output, Which Is Easy To Use. This Sensor Is A High-performance Sensor That Closely Combines Infrared Absorption Gas Detection Technology With Precise Optical Path Design And Excellent Circuit Design. Colour:as Shown Material:pcb Style:-z14a Tips: The Product May Be Updated Constantly ,due To Different Batches, The Actual Product May Have Slight Differences Or Color Differe