NDIR CO2 Sensor MH-Z14A Carbon dioxide detection

ZPHS01B is an all-in-one air quality module, which integrates laser dust sensor, infrared CO2 sensor, electrochemical formaldehyde, ozone and carbon monoxide sensors, VOC sensor, NO2 sensor, temperature and humidity sensor.

High sensitivity to Ammonia (NH3), Nitrogen oxides (NOx), Alcohol, Sulphides, Benzene (C6H6), CO2, smoke and other harmful gases.  The MQ-135 sensor is to sensible for other gasses in the air so that is not possible to get good values for CO2 from it.
MQ-135 Air Quality Sensor features:
- Main chip: MQ-135 natural gas sensor and comparator LM393
- Working voltage: 5V
- Current: 150mA
- Digital output: TTL 0/1
- Analog output: analog voltage sensing value
- Quick response features:
- Detection concentration:
   10ppm - 300ppm NH3
   10ppm - 1000ppm Benzene
   10ppm - 300ppm Alcohol
- Adjustable sensitivity with the potentiometer
- Size: 32mm x 20mmx 18mm

Air quality sensor with high precision whose SDS011 uses laser dispersion to detect particle concentration between 0.3 and 10 um in the air.

With digital output by USB (UART) and built-in fan. It is a powerful sensor, fast (response less than 10s), accurate and reliable.

The Carbon Monoxide sensor is a low-power digital gas sensor which has a CCS811 sensor and an 8-bit microcontroller, contains an analog-digital converter so that it can detect indoor air quality which can detect monoxide carbon (CO) and a wide range of volatile organic compounds (VOCs). It is a sensor designed to monitor air quality inside personal devices such as mobile devices and smart watches, with low power consumption that can be used with battery

This HAT is an open source portable sensor that provides the level of suspended particulate matter quantity with its mass. It has a powerful and high-tech PMSA003 sensor that provides the information of suspended particulate matter (PM1.0, PM2.5, PM10) in the air per unit volume.

The ZP07-MP503 air quality module offers high sensitivity with low power consumption and long life. Calibration before shipment from 10 seconds to 3 minutes max. with automatic warm-up function. Automatic fault check.

This air purifier uses a HEPA filter to remove viruses, bacteria, mould, dander, etc. safely. The dehumidifier regulates humidity in the bathroom, kitchen, etc. Filters up to 99.5% of dust, pollen, tobacco smoke, mould spores and pet dander. Keeps the environment clean.

Low power CO2 sensor MH-Z1311A, the current consumption is only 150-200uA, waterproof and anti-corrosion, high sensitivity, additionally characterised by excellent linear output. It is very popular used for battery monitors and IAQ devices.

The sensors can be integrated into a variety of instruments associated with a concentration of airborne particles to improve equipment, provide timely concentration, and have Exact data.
Present the laser that scatters products on airborne particles, at the same time at a specific angle collect scattered light, changing the intensity curve that scatters over time.
The microprocessor uses the algorithm based on the MIE theory to deduce the grain size contained in the air and the concentration of the particles per unit and quantity. Characteristic: - Power supply: 4.5-5.5 VDC
- Measurement range: 0.3-1.0ï¼ ›1.0-2.5ï¼› 2.5-10 µm (micrometer)
- Accuracy of count: 50%@>

This module is a dust sensor capable of detecting more than one micron of dust particles.
It has two types of output: output of 4V high-level signal for a clean environment and 0.7V low-level signal for a particle-laden environment.
Its power supply is 5VDC and the particle detection range is maximum at 8000 units per 283ml. Dust Sensor Module PPD42NS PM2.5 features:
- Supply voltage: 5VDC
- Working current: 90mA
- Sensitivity: 0.5V / ( 0.1 mg / m3)
- Particle detection minimum value: 1 micron
- Output mode: Hi = 4V impulses (clean environment); Lo = 0.7V (charged environment)
- Temperature working: 0-45 ° C
- Working humidity: 0-90% RH
- PCB size: 59x45x22 mm