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- | Module | NDIR | Carbon dioxide (CO2) | 0...40 000ppm at I2C, UART, 0...5 00ppm at PWM | - | UART/I2C, PWM | - | ±(30 ppm + 3%) at 400...10 000ppm | 3,3...5,5V | 19 (Avg. Typ.) mA | 0...+50°C | 35x23x7mm | SMD | RH and T measurement | - | - | CO2 output range: 0...40 000ppm I2C, UART, 0...5 000ppm PWM |
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SCD4x | Sensor | Photoacoustic | Carbon dioxide (CO2) | 0...40 000ppm | - | I2C | - | ±(50 ppm + 5 %) at 400...2 000ppm | 2,4...5,5V | 15mA, 3,2mA *1 (Typ., Avg.) at 3,3V mA | -10...+60°C | 10,1x10,1x6,3mm | SMD | RH and T measurement, low power mode | 3 | - | *1: low power mode |
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SENSIRION
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SCD4x | Sensor | Photoacoustic | Carbon dioxide (CO2) | 0...40 000ppm | - | I2C | - | ±(40 ppm + 5 %) at 400...5 000ppm | 2,4...5,5V | 15mA, 3,2mA *1, 0,45mA *2 (Typ., Avg.) at 3,3V mA | -10...+60°C | 10,1x10,1x6,3mm | SMD | RH and T meas., low power mode, single shot mode | 3 | - | *1: low power mode, *2: single shot mode |
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SGP4x | Sensor | MOS | Volatile Organic Compound (VOC) | 0...1000 ppm ethanol equiv | - | I2C | 870 at 5-10ppm | - | 1,7...3,6V | 2,6mA (Typ) at 3,3V mA | -10...+50°C | 2,44x2,44x0,85mm | Connector | VOC Index 1...500 | - | - | MCU that runs Sensirion VOC algorithm is required. |
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SGP4x | Sensor | MOS | Volatile Organic Compound (VOC), NOx | 0...1000 ppm ethanol equiv, 0...10 ppm NO2 equiv | - | I2C | - | - | 1,7...3,6V | 3,2mA (Typ) at 3,3V mA | -10...+50°C | 2,44x2,44x0,85mm | SMD | VOC Index 1...500, NOx Index 1...500 | - | - | MCU that runs Sensirion VOC algorithm is required. |
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STC | Sensor | MOS | CO2 in N2 and CO2 in air | 0...25%, 0...100% | - | I2C | - | ±0,5% | 2,7...5,5V | 5 mA | -20...+85°C | 3,5x3x1mm | SMD | - | 1 | - | Calibrated only for the gas mixture: CO2 + air, CO2 + N2 |
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SCD4x | Sensor | Photoacoustic | Carbon dioxide (CO2) | 0...40 000ppm | - | I2C | - | ±(40 ppm + 5%) at 1 001...2 000ppm | 2,4...5,5V | 15mA at 3,3V mA | 0...+50°C | 10,1x10,1x6,3mm | PCB | RH and T measurement | 1 | - | - |
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SENSIRION
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SCD4x | Sensor | Photoacoustic | Carbon dioxide (CO2) | 0...40 000ppm | - | I2C | - | ±(50 ppm + 5 %) at 400...2 000ppm | 2,4...5,5V | 15mA, 3,2mA *1 (Typ., Avg.) at 3,3V mA | -10...+60°C | 10,1x10,1x6,3mm | SMD | RH and T measurement, low power mode | 3 | - | *1: low power mode |
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SENSIRION
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SCD4x | Sensor | Photoacoustic | Carbon dioxide (CO2) | 0...40 000ppm | - | I2C | - | ±(40 ppm + 5 %) at 400...5 000ppm | 2,4...5,5V | 15mA, 3,2mA *1, 0,45mA *2 (Typ., Avg.) at 3,3V mA | -10...+60°C | 10,1x10,1x6,3mm | SMD | RH and T meas., low power mode, single shot mode | 3 | - | *1: low power mode, *2: sin |
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- | Module | Electrochemical | Formaldehyde (CH2O) | 0...1000ppb | - | UART/I2C | - | ±20% | 3,15...5,5V | 1 (Avg. Typ.) mA | 0...+40°C | 46x24x5,5mm | Connector | Temperature and RH measurement | 1 | - | - |
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SGP | Sensor | MOS | Volatile Organic Compound (VOC) | VOC: 0...60ppm | - | I2C | - | ±15% | 1,8V | 0,065 mA | +5...+55°C | 2,45x2,45x0,9mm | SMD | - | 1 | - | - |
