Precise details:
MH-Z19B carbon dioxide gas sensor (hereinafter referred to as the sensor) is a general-purpose smart small-scale sensor that uses non-dispersive infrared (NDIR) principle to detect the presence of CO2 in the air, with good selectivity and anaerobic Gas dependence, long life and other characteristics; built-in temperature compensation; at the same time with serial output, analog output and PWM output, easy to use. The sensor is a high-performance sensor that combines mature infrared absorption gas detection technology with precise optical path design and sophisticated circuit design.
Parameters:
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Product model number: MH-Z19B
- Gas Detection: Carbon Dioxide
- Supply voltage: 4.5~5.5V DC
- Average current: <20mA (@5V power supply)
- Peak current: 150 mA (@5V supply)
- Interface level: 3.3V (5V compatible)
- Measurement range: 0~5000ppm can be selected within the range
- Warm-up time: 3min
- Response time: 90<120s
- Working temperature: 0～50°C
- Operating Humidity: 0 to 95% RH (non-condensing)
Characteristics：
Gas chamber with gold plating, waterproof and corrosion resistant
- High sensitivity, low power consumption
- Excellent stability
- Temperature compensation, excellent linear output
- Provides serial (UART), analog (DAC), PWM waveform output methods
- long lasting
- Water vapor interference, not poisoning
Application:
HVAC refrigeration equipment
- Air quality monitoring equipment
- Fresh air system
- Air purification equipment
- Smart home
- SCHOOL
Vin: Power Positive (Vin)
GND: Negative Power Supply (GND)
Vo: Analog output
PWM: PWM
HD: HD (zero for school, low for more than 7 seconds)
Rx: UART(RXD) TTL Level Data Input
Tx: UART (TXD) TTL level data output
Pin 1: Analog Output Vo
Pin 2: None
Pin 3: Negative Power Supply (GND)
Pin 4: Positive Power Supply (Vin)
Pin 5: UART(RXD) TTL Level Data Input
Pin 6: UART (TXD) TTL Level Data Output
Pin 7: None
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