The electrochemical formaldehyde module is a universal and miniaturized module. The detection of CH20 in air using electrochemical principles has good selectivity and stability. Built in temperature sensor for temperature compensation; It has both digital output and analog voltage output modes, making it convenient to use. The electrochemical formaldehyde module is a universal gas module designed and manufactured by closely combining electrochemical detection technology with sophisticated circuit design. Product Model: SC11-CH20 Pin Type Gas detection: formaldehyde Interference gases: alcohol, carbon monoxide, and other gases Output data: UART output (3.3V level)/PWM output Working voltage: 4.2V-5.5V Preheating time: less than equal 3 minutes Response time: less than equal 60 seconds Recovery time: less than equal 60 seconds Range: 0-2000 PPB Resolution: less than equal 1 PPB Working temperature: -20 ℃-50 ℃ Working humidity: 15% RH-90% RH (non condensing) Storage temperature: 0-25 ℃ Service life: 2 years (0 ℃-35 ℃ in air) Module size: Length 18mm x Width 18mm Color:As Shown Material:plastic Package Contents: 1 * Sensor Module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.