As we all know, whether it is volatile gasoline gas or volatile diesel gas in a gas station, after they are mixed with air at a certain concentration, they are in danger of explosion when exposed to an open flame. That is to say, when the concentration of gasoline gas in the air in the area reaches 1.1 volume ratio or the concentration of diesel gas reaches 1.5 volume ratio, explosion will occur when high-temperature substances such as open flames or sparks reach the ignition point. Therefore, gas stations must require the installation of combustible gas alarm .In particular, AQ 3010-2022 "Safety Code for Gas Station Operation" approved and issued by the Emergency Management Department is planned to be formally implemented from April 1, 2023, which also has new requirements for combustible gas acousto-optic alarm devices:

Customers are allowed to pay by mobile phone in the refueling operation area with combustible gas sound and light alarm device. When the on-site alarm gives an alarm, the mobile phone and refueling related operations should be stopped immediately, and emergency treatment should be carried out according to the emergency plan. The design of combustible gas detection and alarm shall comply with the provisions of GB/T 50493.

and we can effectively detect the concentration of combustible gas by installing combustible gas alarm in gas stations to prevent the concentration of combustible and toxic gas from exceeding the standard after gas leakage. Among them, Yiyuntian's MIC-500S-Ex-A fixed combustible gas alarm is the 1 gas detector specially used in gas stations.

MIC-500S-Ex-A fixed combustible gas alarm instrument is used for combustible gas concentration detection and combustible gas concentration exceeding alarm, it can accurately detect the concentration of combustible gas and display the real-time concentration value of combustible gas, over-standard sound and light alarm, standard signal output, with signal stability, sensitivity and high precision, flameproof connection mode is suitable for all kinds of dangerous places.

technical parameters of fixed combustible gas alarm:

detection gas: combustible gas (all flammable and explosive gases, alkanes are more common) (oil and gas measurement)

detection principle: catalytic combustion, optional non-spectroscopic infrared principle (MIC-500S-Ex-IR-A)

display mode: HD 1.7 "HD color screen 320X240 resolution, optional: high brightness LED display

detection range: 0~100 LEL, other ranges can be customized

resolution: 0.1%LEL

detection method: diffusion measurement, optional pipeline type, flow type, pump type

installation method: wall-mounted fixed installation, optional pipeline installation and flange installation

detection error: ≤ 3% (f.S), higher precision can be customized

response time: T90 ≤ 30S

output signal: three-wire or four-wire 4 ~ 20mA, HART, relay (passive or active output), bus RS485-RTU

alarm mode: 1 or 2 passive contact (dry node) signal output and alarm point can be set, optional split sound and light alarm

working environment: atmospheric pressure 30%,-40 ℃ ~ +70 ℃, customized or optional pretreatment system

relative humidity: ≤ 95% RH (non-condensation), higher humidity environment needs to be customized or optional pretreatment system

working voltage: 12~30V(DC), a single standard power supply is 24V,1A or more than 1A DC switching power supply, regulated power supply

sensor life: catalytic combustion 2~3 years, infrared principle 5~10 years

explosion-proof form: flameproof type, explosion-proof grade ExdⅡ CT6/EXiaIICT6

connecting cable: three-wire 4 ~ 20mA output selects three-core shielded cable, RS485 output selects four cores, shield to ground

Electrical interface: 3/4NPT, optional 1/2NPT, M20X1.5

Protection level: IP67

overall dimensions: 240 × 160 × 90mm or 240 × 220 × 90 (with audible and visual alarm)

weight: about 1.6Kg

In summary, this is the reason why gas stations require the installation of combustible gas alarms.Due to its own nature, gas stations have the risk of fire and explosion accidents. The installation of combustible gas alarm can greatly reduce the risk of accidents, not only to better protect the gas safety of gas stations, but also to better protect the lives and property safety of employees and consumers.