MH-Z19C CO2 senzor karbon dioksid senzor

Prodajem kvalitetan senzor CO2 sa sledecim karakteritikama:

  The MH-Z19C carbon dioxide gas 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. And other features; 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.  

Product parameters:

Detection gas: carbon dioxide

Power supply voltage: DC (5.0 ± 0.1) V

Average current: <40mA (@5V power supply)

Peak 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< 120s

Working temperature: -10-50degree

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