MH-Z14 A CO2 sensor - infrared, 0-5000 ppm, 5 V
MH-Z14 A CO2 sensor - infrared, 0-5000 ppm, 5 V
This goes with it
Pay in 30 days
Pay in 30 days
Description
Product Overview
- Infrared sensor for measuring carbon dioxide concentration in the air
- Measuring range 0 to 5000 ppm (Parts Per Million)
- Accuracy ±200 ppm or ±5 percent of the measured value
- Connection via UART or PWM output
- Operating voltage 4.5 to 5.5 volts
- Supports automatic calibration; external calibration possible
- With characteristic curve for temperature compensation
Product Description
The infrared carbon dioxide sensor uses the absorption properties of CO2 in the infrared spectrum to measure air quality. The sensing element operates without chemical reactions and measures the range from 0 to 5000 ppm, which is sufficient for indoor and non-industrial environments. Accuracy is ±200 ppm or ±5 percent of the measured value, whichever deviation is greater.
The sensor outputs its readings either serially via UART or as a pulse width via PWM. This allows connection to common microcontroller boards and single-board computers without additional converters. The operating voltage of 4.5 to 5.5 volts requires a stable power supply in the 5 V range; when used with 3.3 V systems, level shifters are required. The sensor performs automatic calibration, but it can also be calibrated manually if the air quality is known.
Typical applications include CO2 traffic lights in schools and offices, which indicate when ventilation is advisable, as well as indoor air monitoring in residential areas to prevent headaches caused by poor ventilation. Greenhouses and terrariums also benefit from continuous CO2 monitoring, as the gas affects plant growth. In research projects, the sensor is used to validate indoor air control systems.
A microcontroller with UART or PWM inputs is required for operation. The sensor's response time is approximately 60 seconds, so very rapid measurement changes are not detected immediately. Long-term stability is ensured by automatic calibration; however, regular verification at a known CO2 concentration is recommended.
Safety Notice
The sensor is not intended for installation in the household power circuit and is intended exclusively for building prototypes and for testing and development purposes. The device operates at low voltage and does not itself create any hazards; nevertheless, work on or in the immediate vicinity of electrical installations should be carried out exclusively by qualified electricians. If you have questions about integrating it into existing systems, consult a qualified electrician before commissioning.
Scope of Delivery
- 1x MH-Z14A infrared carbon dioxide sensor module