
ABOUT
Hanhai Opto-electronic is a major scientific research achievement transformation institution of the Hefei Institute of Physical Science, Chinese Academy of Sciences.

(Methane) Passive Laser Point-type Flammable Gas Monitoring System As an industrial-grade high-precision monitoring device equipped with Hanhai's proprietary passive core technology and featuring a stainless steel detection terminal, it is specially designed for the fixed-point accurate monitoring of methane’s flammable properties and in complex corrosive scenarios. Adhering to the core design philosophy of "passive intrinsic safety, stainless steel corrosion resistance and durability, and point-type accurate early warning", the product innovatively adopts a "host + optical fiber + stainless steel passive detection terminal" architecture. It breaks through the power supply limitations, material weather resistance shortcomings and fixed-point monitoring accuracy bottlenecks of traditional monitoring equipment, providing a full-cycle, highly reliable methane leakage monitoring solution for scenarios such as chemical parks, coastal gas facilities and high-humidity corrosive environments.
The system’s proprietary passive technology lays a solid foundation for safety. The detection terminal adopts a pure optical design without electrical components or electric spark risks, perfectly adapting to the high-risk flammable and explosive characteristics of methane and eliminating potential safety hazards from the source. The stainless steel terminal enhances corrosion resistance, boasting strong resistance to corrosion, rust, pressure and aging. It can withstand harsh working conditions such as coastal salt spray, chemical acid-base media and high-humidity environments, solving the pain points of traditional terminals such as easy corrosion and short service life caused by material limitations. The point-type design is precisely suitable for fixed-point monitoring, and can be accurately deployed at leakage-prone points such as pipeline interfaces, valves and storage tank flanges to achieve "point-to-point" accurate monitoring. Combined with optical fiber transmission with a distance of up to several kilometers, a single host can connect multiple terminals in series, balancing single-point precision and large-scale coverage. The system conducts 24/7 uninterrupted online monitoring, with real-time data displayed on the host. An audible and visual alarm is triggered immediately when the concentration exceeds the standard, and it can be connected to the enterprise’s intelligent safety system to form a closed loop covering the entire process of "monitoring - early warning - disposal".

Independent research and development

Active monitoring

Maintenance-free

High sensitivity

No false positives

Zero false negatives

Strong anti-interference
1. Building and Construction Scenarios
Large-scale commercial complexes, newly-built high-end buildings and office buildings. It is suitable for methane leakage monitoring in areas such as gas pipelines and kitchens, adapting to complex indoor environments.
2. Underground Engineering Scenarios
Tunnels, urban utility tunnels, buried gas pipelines, gas valve wells and power wells. It withstands harsh closed and humid working conditions and prevents methane accumulation risks.
3. Industrial Production Scenarios
Oil and petrochemical plants, LNG terminals, chemical tank farms and oil refining units. It adapts to high-dust and high-salt-spray environments and monitors methane leakage during production, storage and transportation processes.
4. Energy and Mining Scenarios
Coal mines, gas drainage pipelines and natural gas stations. The passive design eliminates electric spark hazards and enables precise prevention and control of methane leakage such as mine gas.
5. Civil and Municipal Scenarios
Gas pressure regulating stations, residential area gas pipelines and commercial kitchens. It meets the needs of daily operation and maintenance as well as safety monitoring, adapting to various civil and municipal scenarios.
No power supply is required at the monitoring site, as the system is connected via optical fibers. The monitoring platform receives and processes data from each optical sensing terminal in real time, ensuring more stable monitoring performance.
It subverts the traditional system composition mode and adopts a digital design from the optical sensing terminals to the control system. The simplified system structure facilitates easier installation and can meet more application requirements of customers.
The optical sensing terminals are purely optical components with non-loss characteristics, featuring high reliability and no need for calibration.
Each monitoring channel has a response time of only 10 seconds and a transmission distance of up to 20 kilometers. It can accurately detect ppm-level trace gas leaks, truly achieving preventive gas leakage monitoring.
The ultra-long service life of the entire system significantly reduces the equipment operation costs throughout its life cycle.
TEL:400-055-1239 (9:00~17:00)
MAIL:lisghanhai@gkhhlaser.com
ADDR:302 Floor, Building 5, No. 18, Kechuang 13th Street, Beijing Economic and Technological Development Zone
