LPG gas leak detection system is an important solution in ensuring the safety of people and property in areas using gas. This article will provide detailed information about the structure, operating principles, types of sensors, applications, benefits and practical cases when using LPG gas leak detection system.

1. Basic structure of LPG gas leak alarm system

LPG gas leak detection system usually includes the following main components:

• Gas sensor: This is the most important component in the system, responsible for detecting the presence of LPG gas in the air. The sensor is usually placed in locations prone to leaks and can use semiconductor, infrared or catalytic technology to detect the gas.
• LPG Leak Detector: Is the control center of the system, has the function of receiving data from sensors, analyzing signals and comparing with pre-programmed safety thresholds.
• Warning device: Includes siren and indicator light. When a gas leak is detected, the system will activate these devices to notify of danger.
• Solenoid valve: It is a device that automatically closes the LPG gas supply when receiving a signal from the leak alarm cabinet, to prevent gas from continuing to escape into the environment.

2. Operating principle of LPG gas leak alarm system

The LPG gas leak alarm system operates according to the following process: Step 1: Detect gas leaks

• When LPG gas leaks, sensors placed at appropriate locations will detect the increase in gas concentration in the air.
• The sensor will convert the chemical or optical (in infrared sensors) signal into an electrical signal.

Step 2: Signal Analysis

• The signal from the sensor is transmitted to the LPG leak detector.
• The leak detector analyzes the data and compares the measured gas concentration with a safe threshold (usually below 10% LEL – Lowest Explosive Limit). If the concentration exceeds the threshold, an alarm signal is triggered.

Step 3: Activate Alerts

• The system will activate:
  • Siren: Make a loud sound to attract the attention of staff.
  • Indicator light: Flashes in danger area to warn.

Step 4: Close the gas supply

• The leak alarm transmits the signal to the solenoid valve.
• The solenoid valve will automatically close the LPG gas supply to prevent further leakage.

3. Types of LPG gas sensors

LPG gas leak detection systems can use different types of sensors depending on the purpose and usage requirements:

• Semiconductor sensor: Works based on the change in resistance when in contact with gas.
• Infrared sensor: Gas identification through the ability to absorb light at specific wavelengths.
• Catalytic Sensor: Detects temperature changes due to chemical reactions between gas and the sensor surface.

4. Practical application of LPG gas leak detection system

LPG gas leak alarm system is widely used in many different fields:

• Family: Ensure safety for gas stove system in the house.
• Industrial: Installed in factories and LPG warehouses to prevent the risk of fire and explosion.
• Commerce: Safety protection for restaurants, hotels and industrial kitchens.

5. Benefits of LPG gas leak detection system

• Early detection of risk: Helps prevent fire incidents from the very beginning.
• Protect people and property: Ensure the safety of employees, residents and important assets.
• Increase automation: Modern systems can be integrated into smart home solutions or remote monitoring systems, increasing management and operational efficiency.

6. Real cases and solutions from Hiroshima Energy Supply

Case 1: Famous Japanese Corporation In a large industrial kitchen of a famous Japanese corporation, chefs were preparing meals for hundreds of employees. One morning, they heard a small hissing sound coming from the cooking stove, but there was no device to warn of the abnormal situation. When an employee turned on the stove to cook, the accumulated LPG gas flared up violently, causing burns to his hands and face. This incident not only caused fear and personal damage, but also disrupted the entire operation of the kitchen. After the incident, the corporation's management turned to Hiroshima Energy Supply to find a solution. We conducted a survey of the current situation and quickly installed an advanced LPG leak detection system, including sensitive gas sensors, leak alarm cabinets, and automatic solenoid valves. The new system not only ensured timely detection and prevention of leaks, but also brought peace of mind to all employees in the kitchen.

• Problem: The chef heard a gas leak but there was no leak detection system to warn him. When the stove was turned on, the gas flared up and burned the staff.
• Solution: Hiroshima Energy Supply has installed an LPG leak detection system, including gas sensors and automatic solenoid valves, to enhance safety throughout the plant.

Case 2: Customer at Gia Phu Industrial Park, Ninh Binh At a factory in Gia Phu Industrial Park, Ninh Binh Province, workers were working amidst the roaring sounds of machinery when they suddenly heard a loud bang. The gas meter on the system suddenly exploded, creating an explosion so powerful that it blew off the roof of the factory, causing panic among people in the area. Although fortunately no one was seriously injured, the incident left a haunting fear in the minds of many workers. After the incident, the management immediately contacted Hiroshima Energy Supply for support. We quickly surveyed the situation and determined that the main cause was a gas leak from an unmonitored system. HES designed and installed a comprehensive LPG leak detection system, including sensitive sensors at leak points, automatic solenoid valves to cut off the gas supply, and clear warning devices such as sirens and flashing lights. After implementing the solution, the plant not only reduced the risk of a recurrence, but also improved the reliability of the entire production system. Workers now work in a safer environment, with the peace of mind that any gas-related issues will be detected and dealt with promptly.

• Problem: Gas leak leads to gas meter explosion and serious damage to factory roof.
• Solution: We have consulted and installed LPG leak detection system, ensuring timely detection and handling of problems in the future.

Case 3: Customer at Dinh Bang Industrial Park, Bac Ninh At a large industrial cluster in Dinh Bang, Bac Ninh, factory workers often work near a gas tank system. One day, a strong smell of gas began to spread throughout the area, causing many people to feel worried and insecure. Although they recognized the problem, they had no way to determine the exact location of the leak or the severity of the incident. The management contacted Hiroshima Energy Supply to find a solution. After a thorough survey and analysis, we advised the installation of a modern gas leak detection system at key locations in the factory. This system not only helps detect leaks in time but also triggers clear warnings, ensuring that employees can respond quickly and minimize risks. Thanks to our solution, the factory not only improved its safety level but also strengthened employees' confidence in the protection of the business.

• Problem: Strong gas smell coming from tank system. Staff has no specific way to detect it.
• Solution: Install gas leak detectors at important locations to improve warning effectiveness and ensure safety.

Hiroshima Energy Supply is proud to be a trusted partner in providing LPG safety solutions. We are committed to bringing peace of mind and efficiency to our customers!