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MH-Z19C carbon dioxide gas sensor air quality monitoring CO2 detection sensor module
Product parameter
Product model: MH-Z19C
Detection gas: carbon dioxide
Power supply voltage: DC (5.0 ± 0.1) V
Average current: <40 mA (@5V power supply)
Peak current: 125 mA (@5V power supply)
Interface level: 3.3V (compatible with 5V)
Measuring range: Optional within the range of 400~5000ppm
Output signal: String ☐ (UART) (TTL level 3.3V) PWM
Warm-up time: 1min
Working temperature: -10℃~50℃
Working humidity: 0~95%RH (non-condensing)
Lifespan> 5 years
Pin description
Vin: Positive power supply (Vin)
GND: negative pole of power supply (GND)
PWM: PWM
Hd: HD (zero calibration, valid at low level for more than 7s)
Rx: UART (RXD) TTL level data input
Tx: UART (TXD) TTL level data output
Precautions
1. The gold-plated plastic cavity of the sensor should not be subjected to pressure in any direction during the welding, installation, and use of the sensor.
2. If the sensor needs to be placed in a small space, this space should be well ventilated, especially the two diffusion windows should be in a well-ventilated position.
3. The sensor should be far away from heat sources, and avoid direct sunlight or other heat radiation.
4. The sensor should be calibrated regularly, and the calibration period is recommended to be no more than 6 months.
5. Do not use the sensor for a long time in an environment with high dust density.
6. In order to ensure that the sensor can work normally, the power supply voltage must be maintained in the range of (5.0+0.1) VDC. The power supply current must not be less than 150mA.
7. If it is not within this range, the sensor may malfunction, the output concentration of the sensor is low, or the sensor cannot work normally.
8. When manually calibrating the zero point or sending a command to calibrate the zero point, you must work continuously for more than 20 minutes in a stable gas environment (400ppm).
9. Wave soldering is prohibited for the sensor.
10. When soldering with a soldering iron, the temperature setting must be (350+5)℃, and the soldering time must be less than 3S.
11. When using the sensor, it is recommended that the customer adopt the method of welding the base, which can directly plug and unplug the sensor, which is convenient for maintenance.
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SHIPPING
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2.We will send the items with 2-5days once the payment is confirmed by the system.
3. Any import Taxes is not included in the shipping fee, buyers are responsible for the customs duties when it is occurred .
4.Any request to get the refund ,please send back the items back to us. Customers should pay the freight back to China if problems if yours .
on the other side, if problem is ours we will pay the shipping fee.
5.Express shipping (DHL,Fedex,UPS,TNT etc) and post service are provided for the shipping. 3-7Days will be arrived to your door by Express shipping
Post service Such as China Post Register Air Mail ,Singapore post, Hongkong Post Air Mail reach most countries within 15-45 business days,
Some destination and other factors may take up to 60 business days.
Please pay attention : Order less than 7 USD will not have tracking numberbut you will get the items for sure,
please contact us to get a refund or resent if you don’t get within 60 working days .
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