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
