MH-Z19 MH-Z19C IR Infrared CO2 Sensor Module NDIR Accessories
The MH-Z19C carbon dioxide gas sensor (hereinafter referred to as the sensor) is a general-purpose intelligent small sensor that uses the principle of non-dispersive infrared (NDIR) to detect the presence of C02 in the air.
Built-in temperature compensation: simultaneously has serial output, PWM output, easy to use. The sensor is a high-performance sensor made by closely combining mature infrared absorption gas detection technology with sophisticated optical circuit design and sophisticated circuit design.
Detection gas:carbon dioxide
Power supply voltage:DC (5.0 0.1) V
Average current:Less than 40mA (@5V power supply)
current:125 to (@5V power supply)
Interface level:3.3v(compatible with 5v)
Measuring range:400-5000PPM optional
Output signal:serial UART(TL level 3.3V)
Warm-up time:1min
Response time:T90 Less than 120s
Working temperature:-10-50
Working humidity:0-95%RH(no condensation)
Pin description:
Vin:Power +(in)
GND:power supply-(GND)
PWM:PWM
Hd:HD (zero calibration, low level is effective for more than 7 seconds)
Rx:UART (RXD) TTL level data input
Tx:UART (TXD) TTL level data output
Output method:
PWM output
Assume the measurement range is 400-2000ppm
CO2:Concentration output range: 400-2000ppm
Period:1004ms 5%
High level output at the beginning of the cycle: 2ms (theoretical value)
Central period:1000ms 5%
Low level output at the end of the period: 2ms (theoretical value)
Calculation formula for obtaining current CO2 concentration value by PWM: Cppm=2000X (TH-2ms)/(TH+TL-4ms)
Cppm: CO2 concentration value calculated by the unit of ppm
TH: the time when the output is high level in one output cycle
TL: the time when the output is low in one output cycle
Due to different product batches, the appearance may vary, which does not affect the use.
Colour:As Shown
Material:PC+Aluminum Alloy
Package Contents:
1 x CO2 Sensor Module
Only the above package content, other products are not included.
Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
What's in the box
1 x CO2 Sensor Module
