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 |
L <0.8 @3.3, H>2.7@3.3 |
Volt (V) |
| Working temperature |
0-50 |
Photographing degree (2) |
| Operating humidity |
0~85% non-condensing |
|
| Storage temperature |
-40~85°C |
Photographing degree (2) |
| Mean time between failures |
>=3 |
Year (Y) |
| Pin spacing |
2 |
Millimeter (mm) |
Package includes:
1 x CO2 Sensor
