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: P1N1 VCC Power supply (+5V) PIN2 GND Negative power supply PIN3 TXD Serial Receiver Pin / TTL Level @ 3.3V PIN4 RXD Serial port transmit pin / TTL level @ 3.3V PIN5 RESET Module reset signal / TTL level @ 3.3V, low reset PIN6 NC NC PIN7 NC NC Parameter Index Unit Effective 400~3000 ppm Maximum 400~5000 ppm Resolution 1 ppm Precision ± (50ppm + 5% FS) Single response time <3 Seconds (s) Comprehensive response time ^25 Seconds (s) DC supply voltage
Typ: 5.0
Min: 4.5 Max; 5.5 Volt (V) Working current Peak 400 average 40 Milliamper (mA) Stand-by current <=200 Microamp (mA) Data interface level