Gravity CO2 Sensor Selection Guide
| Product Name | Gravity：Analog Electrochemistry CO2 Sensor | Gravity：Analog IR CO2 Sensor | Gravity：UART IR CO2 Sensor | Gravity: I2C SCD41 Infrared CO2 Sensor |
| 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 | ±[email protected] | ±(100ppm + 6% readings) | ±(100ppm + 6% readings) | ±(40 ppm + 5% MV) |
| Response Time | <20s | <90s | <30s | 60s |
| Average Power | <1W | <[email protected] | <[email protected] | <[email protected] |
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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