Gravity CO2 Sensor Selection Guide

Product Name

Gravity: Analog Electrochemical Carbon Dioxide Sensor (0-10000 ppm)

Gravity: PWM Infrared Carbon Dioxide Sensor (400-5000 ppm)

Gravity: UART Infrared Carbon Dioxide Sensor (0-50000 ppm)

Gravity: I2C SCD41 Infrared CO2 Sensor (400 - 5000 ppm)

Figure

SKU

SEN0159

SEN0219

SEN0220

SEN0536

IC/Module

MG-811

MH-Z14

MH-Z16

SCD41

Operation Voltage

3.7～5V

4.5～5.5V

4.5～5.5V

3.3V-5V

Output

Gravity: Analog(Analog2.7～4.1V)+3P Header Digital Output(Alarm):0～VCC Level

Gravity: Analog (Analog Output 0.4～2V)

Gravity: UART(0～3.3V Level)

Gravity: I2C

Measurement Principle

Electrochemistry（Solid electrolyte battery principle）

NDIR(non-dispersive infrared)

NDIR(non-dispersive infrared)

photoacoustic NDIR

Measurement Range

0～10000 ppm

0～5000 ppm

0～50000 ppm

400 - 5000 ppm

Accuracy

±100ppm@400ppm

±(100ppm + 6% readings)

±(100ppm + 6% readings)

±(40 ppm + 5% MV)

Response Time

<20s

<90s

<30s

60s

Average Power

<1W

<430mW@5V

<430mW@5V

<30mW@5V

Operation Temperature

-20℃～50℃

0℃～50℃

0℃～50℃

-10℃～60℃

Operation Humidity

0～95% RH (No condensation)

0～95% RH (No condensation)

0～95% RH (No condensation)

0～95% RH (No condensation)

Lifespan

>1 years

>5 years

>5 years

>10 years

Dimension (PCB)

32*42 mm

37*69 mm

21*27.1 mm

32*27*8mm

Features

1. Expansive measurement range 2. Vast temperature range 3. Customizable alarm threshold 4. Swift and responsive 5. Analog output capability

1. High accuracy 2. Prolonged lifespan 3. Automatic temperature compensation 4. Resistant to water vapor interference 5. Analog output capability

1. High accuracy 2. Wide-ranging capability 3. Extended operational lifespan 4. Automatic temperature compensation 5. Resilient against water vapor interference 6. 3.3V serial port output

1. Tripartite integration of CO2, temperature, and humidity 2. Compact dimensions of 32*27*8mm 3. Low power consumption, with an average current of less than 4mA 4. Remarkably long operational lifespan

Suggested Application Scenarios

As a CO2 sensor with a wide temperature range and affordable price, this sensor exhibits low power consumption, fast response speed, and the ability for long-term online monitoring. It is suitable for low-cost applications where high precision is not required, such as monitoring CO2 levels in small indoor rooms or DIY projects.

As a high-precision CO2 sensor, it is well-suited for applications that require accurate measurements of CO2 concentration in environments where the concentration levels are not excessively high. Examples of such environments include smart homes, classrooms, or offices where indoor air quality monitoring is of utmost importance.

As a high-precision and wide-ranging CO2 sensor, it is suitable for applications that require measuring high concentrations of CO2 with exceptional accuracy. Examples of such environments include chemical laboratories, agricultural greenhouses, and monitoring production processes in industrial settings.

This sensor with its "tripartite integration" functionality and long operational lifespan is well-suited for applications that require simultaneous measurement of CO2, temperature, and humidity. Examples of such application scenarios include indoor air quality monitoring, greenhouse detection, smart homes, and control of air conditioning systems.

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