CO2 Sensor Module – MH-Z19B
Measures carbon dioxide from 0 to 5,000 ppm with NDIR infrared sensing and reports it on UART and PWM outputs; runs on 5 V.
SKU 2846-CO2SENSMHZ19BEAN 8219671120999Item type: AssembledSensors, Sensors
Description
MH-Z19B carbon dioxide sensor. It uses the non-dispersive infrared principle (NDIR) to detect CO2 in the air. It offers temperature compensation, UART output (3.3 V TTL level) and PWM, high sensitivity, excellent stability and low power consumption. Applications: refrigeration equipment, air quality monitoring equipment, air purifiers, demand-controlled ventilation (DCV), etc.
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| Modules compared | ||||
| 1. The MH-Z19C has one window to receive CO2 gas, while the MH-Z19B has two. 2. The sampling period of the MH-Z19C is 1 second, while that of the MH-Z19B is 5 seconds. 3. The supply of the MH-Z19C is (5+/-0.1) V, while that of the MH-Z19B is 4.5~5.5 V. 4. The MH-Z19C has an analogue output, the MH-Z19B does not. 5. The pre-heating time of the MH-Z19C is 2.5 minutes, while that of the MH-Z19B is 3 minutes. 6. The default self-calibration cycle of the MH-Z19C is 1 day, but a 7-day cycle can be chosen if needed. That of the MH-Z19B is 1 day. Overall the MH-Z19C offers greater consistency and better performance than the MH-Z19B and can replace the MH-Z19B directly. They share the same dimensions. |
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| Documentation and useful links | ||||
Technical details
| Sensor | MH-Z19B |
|---|---|
| CO2 detection | 0 to 5,000 ppm (parts per million) |
| Warm-up time | 3 minutes |
| Response time | T90<120s |
| Output | UART (3.3 V TTL level), PWM |
| Interface level | 3.3 V (5 V compatible) |
| Supply | 4.5 to 5.5 VDC |
| Average current | <60mA (@5V supply) |
| Peak current | 150 mA (@5V supply) |
| Operating temperature | 0°C to +50°C |
| Humidity | 0 to 95% RH (non-condensing) |
| Dimensions (mm) | 26.5x19.5x8 |
| Weight | 6 grams |
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