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