MH-Z19 MH-Z19C MH-Z19B MH-Z19E IR Infrared CO2 Sensor Module Carbon Dioxide Gas Sensors NDIR CO2 Monitor 400-5000 0-5000ppm UART

MH-Z19E MH-Z19D, the specifications are the same, the model name is changed by the factory.

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, 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:

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: 400~5000ppm can be selected within the range

Warm-up time: 3min

Response time: T90<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

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

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. 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

Serial output (UART)

Hardware connection, connect the sensor's Vin-GND-RXD-TXD to the user's 5V-GND-TXD-RXD. (User terminal must use TTL level)

Product Details:

The MH-Z19E carbon dioxide gas sensor (hereinafter referred to as the sensor) is a general-purpose intelligent small sensor. It has two products: pin and terminal. It uses the principle of non-dispersive infrared (NDIR) to detect CO2 in the air and has good selectivity. , No oxygen dependence, etc.; built-in temperature compensation; also has serial port output, PWM output, easy to use. The sensor is a high-performance sensor made by closely combining mature infrared absorption gas detection technology with precise optical circuit design and sophisticated circuit design.

Sensor characteristics:

High sensitivity, low power consumption

Excellent stability

Temperature compensation, excellent linear output

Provide serial port (UART), PWM waveform and other output methods

Application:

HVAC equipment

Air quality monitoring equipment

Fresh air system

Air purification equipment

Smart home

school

Parameters:

Product model: MH-Z19E

Detection gas: carbon dioxide

Power supply voltage: DC(5.0±0.1)V

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

Peak current: 125 mA (@5V power supply)

Interface level: 3.3V (compatible with 5V)

Measuring range: 400~5000ppm optional

Output signal: serial port (UART) (TTL level 3.3V); PWM

Warm-up time: 1min

Response time: T90 <120s

Working temperature: -10℃～50℃

Storage temperature: -20℃～60℃

Working humidity: 0～95%RH (non-condensing)

MH-Z1911A infrared CO2 sensor is intelligent sensor with small size, using non-dispersive infrared (NDIR) principle to detect the concentration of CO2 in the air of buildings such as office, home, classroom, airport installed in air quality meters, air purifier and HVAC system. It has excellent selectivity carbon dioxide, built-in temperature compensation for high accuracy, lower power consumption and optional output ways of UART and PWM. It is developed by the tight integration of mature infrared absorbing gas detection technology, precision optical circuit design and superior circuit design.

Application

HVAC system

Air purifier

Air quality monitor

Consumer CO2 meter

Smart home device

Smart building automation

Indoor environmental control

Features

High sensitivity, low power consumption

Good stability and consistency

Temperature compensation, excellent linear output

Multiple output modes: UART, PWM

Specifications