For the first time, a device for measuring liquefied petroleum gas (LPG) concentration has been developed with sensors produced in Vietnam. The device, named Liquefied Petroleum Gas-meter (LPG), is a product of the Institute of Materials Science, led by Dr. Nguyễn Ngọc Toàn.
According to Associate Professor Nguyễn Ngọc Toàn, the LPG concentration meter can be used to check LPG levels at gas distribution stations, detect gas leaks in transportation pipes, and monitor usage in various locations. The device utilizes highly sensitive LPG sensors created using nanotechnology.
It can store up to 999 measurements, including the time of measurement and results (LPG concentration). Measurement results are displayed within seconds with high accuracy across a wide range (from 0 to 100% LEL). Data can be downloaded to a personal computer or printed on paper. The device operates continuously for 8 hours after charging and has a lifespan of 2 years.
| Technical Specifications |
| Gas type: Hydrocarbon (methane, butane, propane, ethylene…) Resolution: 0.01 % Accuracy: ± 1% Display: (LCD) 2×16 characters Operating temperature: 0-50 degrees Celsius Relative humidity: 95% Dimensions: 145x85x30 mm Weight: Measurement count > 400 (1 minute/measurement with fully charged battery) |
The device features three alarm thresholds at 10%, 50%, and 100% LEL. The 10% LEL level indicates permissible gas concentration in the environment. Concentrations above this level can cause dizziness, disorientation, and unconsciousness. The 50% LEL threshold poses direct health risks, potentially leading to coma. The 100% LEL level is the threshold for fire and explosion. Exceeding this concentration can result in fires in the surrounding area.
Dr. Toàn stated that currently imported measuring devices are expensive and complex, making them prone to malfunctions without available spare parts. In contrast, domestically produced devices cost only half as much, consume less power, offer more convenient functions, have a longer lifespan, and can be maintained during use.
The team is also researching and will soon release a gas leak warning device designed for households. Dr. Toàn advises that in the event of a gas leak, residents should immediately ventilate the room and evacuate. During this time, they should not ignite flames or turn on lights to prevent gas from coming into contact with fire or electricity, which could lead to explosions. The team plans to collaborate with apartment complexes to provide each unit with a measuring device.
The product was approved by the Department of Science and Technology of Ho Chi Minh City at the beginning of September and will be displayed at the Techmart fair from October 12-15 in Ho Chi Minh City.
Contact: Associate Professor Nguyễn Ngọc Toàn – Institute of Materials Science – 18 Hoàng Quốc Việt, Hanoi. Phone: 04 7569318 – 0904154636.
