Plantower® DS-CO2-20 CO2 Sensor Dual Channel Gas Accurate Detection of Carbon Dioxide Sensor Module

Introduction The DS CO2 20 is a digital CO2 concentration sensor based on the principle of non dispersive infrared absorption It continuously collects and calculates the concentration of carbon dioxide in air per unit volume and outputs it as a universal digital interface The sensor can be embedded in various instrumentation environment improvement equipment related to carbon dioxide concentration providing timely and accurate concentration data Working Principle The sensor adopts the principle of non dispersive infrared absorption and has a single gas chamber and two channels which can obtain the light intensity corresponding relationship and variation of the infrared light irradiated on the receiving device by two wavelengths and according to the carbon dioxide for the infrared light of two wavelengths thereof The absorption ratio function calculates the actual carbon dioxide concentration in the chamber Digital Interface Definition P1N1VCCPower supply 5V PIN2GNDNegative power supplyPIN3TXDSerial Receiver Pin TTL Level 3 3VPIN4RXDSerial port transmit pin TTL level 3 3VPIN5RESETModule reset signal TTL level 3 3V low resetPIN6NCNCPIN7NCNCParameterIndexUnitEffective400 3000ppmMaximum400 5000ppmResolution1ppmPrecision 50ppm 5 FS Single response time3Seconds s Comprehensive response time 25Seconds s DC supply voltageTyp 5 0 Min 4 5 Max 5 5Volt V Working currentPeak 400 average 40Milliamper mA Stand by current 200Microamp mA Data interface levelL