Fixed composite gas detectors are safety equipment designed for monitoring multiple gas concentrations simultaneously. They are widely used in industrial environments and specific places where there is a potential gas leakage risk.
Core functions and advantages
Multi-component detection: It can simultaneously detect multiple specific gases in the environment, such as combustible gases, toxic gases (such as CO, H2S, Cl2, NH3, etc.) and oxygen content, achieving integrated monitoring.
Continuous real-time monitoring: Provides 24-hour uninterrupted gas concentration monitoring to detect abnormal situations in a timely manner.
Acousto-light alarm linkage: When the monitored gas concentration reaches the preset alarm threshold, it can automatically issue an acousto-light alarm signal, and can link external equipment such as exhaust air, shutdown valves, etc.
Data recording and communication: Some models have data storage and history query functions, and can be connected to the upper computer or control system through RS485, 4-20mA and other signal outputs, which facilitates centralized management and remote monitoring.
Key technology composition
Fixed composite gas detectors are usually composed of the following core parts:
Gas sensor: Use sensor combinations of different principles such as electrochemistry, catalytic combustion, infrared (IR), photoionization (PID) to detect different gases in a targeted manner. Intelligent sensor technology improves the accuracy and stability of detection.
Signal processing unit: amplify, filter, A/D conversion and microprocessor analysis of the signals collected by the sensor.
Display and alarm module: Usually equipped with a digital or graphic display screen, which displays the gas concentration in real time and triggers the alarm when the limit exceeds the limit.
Housing and installation structure: adopts explosion-proof or intrinsic safety design to adapt to the installation requirements of different hazardous areas.
Main application areas
Fixed composite gas detectors are widely used in the following fields due to their high efficiency and reliability:
Petrochemical, chemical industry
Gas distribution and municipal engineering
Metallurgy, mining
Sewage treatment, landfill
Confined space operations (such as cabins, storage tanks, pipes)
Laboratory and scientific research institutions
Precautions for selection
The following factors must be considered when choosing a suitable fixed composite gas detector:
Target gas type and quantity: Define the type of gas that needs to be detected and the number of types that may exist.
Detection range and accuracy: Select the appropriate range and accuracy level according to the actual concentration range and safety requirements on the site.
Environmental conditions: Consider the temperature, humidity, dust, corrosion and explosion-proof level requirements of the installation site.
Certification and standards: Ensure that the product complies with national and industry-related safety standards and certifications (such as CPA, Ex certification, etc.).
Brand and Service: When choosing a specific product, in addition to paying attention to the type of detection gas, range, explosion-proof grade and related certification, there are also many brands on the market for comparison, such as Honeywell, Dräger, Hanwei Technology and Xhosa . They each have their own emphasis on sensor technology and system integration, and their after-sales service and technical support are also important considerations.
Correct selection, standardized installation and regular maintenance and calibration are the key to ensuring that the fixed composite gas detector plays its due safety protection role.
