Model	Standard	Low Emission	Ultra-low Emission
Range (SO2/NOX/CO)	0-300-3000ppm	0-100-300ppm	0-20-100ppm
Range (CO2/O2)	0-5% to 0-100% vol	0-5% to 0-100% vol	0-5% to 0-100% vol
Linearity	≤±1.5%F.S.
Repeatability	≤±0.5%F.S.
Zero Drift	≤±2%F.S/7d
Span Drift	≤±2%F.S/7d
Response time(T90)	≤10S	≤30S	≤30S

Specifications of pressure differential (gas flow)

Range	0-1500Pa
Accuracy	0.5%
Output	Analog output : (4～20)mA
Power supply	24±11V

Specifications of pressure

Range	-5kpa-5kpa
Accuracy	0.5% (including linearity/repeatability/delay)
Long term Stability	0.2 ％FS @ one year
Temperature stability	0.2 ％FS @ one year (zero and span drift)
Output	4-20mA

Specifications of temperature

Measurement probe	PT100
Range	0～300℃
Accuracy	0.5%

Specifications of dust monitor

Principle	Optical backscatter of light from a red Laser
Measuring object	Particles in the gas steam
Measuring Characteristics	Range : (0～100, 500, 1000, 2000, 10000)mg/m3, Selectable
	Zero Drift : ±2%FS/24hr
	Span Drift : ±2%FS/24hr
	Repeatability : ±2%FS
	Response Time : ≤ 10S
	Measuring Length :（0.5～20）M

Continuously Emission Monitoring System (CEMS) is a specialized system used to monitor and measure the emissions of pollutants from industrial processes and facilities. It is designed to provide real-time data on the release of pollutants into the environment, helping to ensure compliance with environmental regulations and standards.

CEMS typically consist of several components that work together to measure and monitor emissions. These components may include:

1. Gas analyzers: These devices are used to measure the concentration of specific pollutants in the exhaust gases emitted by industrial sources. Common pollutants measured include nitrogen oxides (NOx), sulfur dioxide (SO2), carbon monoxide (CO), particulate matter (PM), and volatile organic compounds (VOCs).
2. Sample probes and sample lines: These components are used to extract gas samples from the emission source and transport them to the gas analyzers for analysis. Sample lines are designed to handle the high-temperature and corrosive nature of the gas samples.
3. Data acquisition system: This system collects and processes the data from the gas analyzers. It typically includes sensors, transmitters, and data loggers to capture and store the emissions data.
4. Calibration systems: To ensure accuracy and reliability, CEMS require periodic calibration. Calibration systems are used to verify and adjust the accuracy of the gas analyzers and other components.
5. Data storage and reporting: CEMS generate a significant amount of data, which needs to be stored and analyzed. Data storage systems and software applications are used to store and manage the emissions data. Reporting tools help generate reports and summaries for regulatory compliance and internal tracking.

CEMS play a crucial role in environmental monitoring and protection. By continuously monitoring emissions, they help industries identify and control sources of pollution, optimize processes to reduce emissions, and ensure compliance with environmental regulations. They also provide valuable data for environmental impact assessments and help in the development of emission reduction strategies.