Nowadays, with the occurrence of various gas leakage incidents, for some places that will involve combustible gas and toxic gas leakage, if the detection and alarm device is not set up according to the national standard, it will be determined as a major production safety accident. Hidden danger. Therefore In order to ensure safety, many places need to install combustible gas alarm, and set the alarm value. Do you know what the Combustible Gas Alarm Level 1 Alarm Setpoint is? The following is a brief introduction by yi yun Tian:

there are clear requirements in the national standard" GBT 50493-2019 "for the relevant provisions of the first-level alarm value for combustible gas detection:

1. The first-level alarm set value of combustible gas should be less than or equal to 25% LEL;

2. The first-level alarm setting value for linear combustible gas measurement is 1LEL · m.

therefore, the primary alarm setting value of combustible gas alarm should be less than or equal to 25% LEL, that is to say, the primary alarm value of combustible gas alarm cannot exceed the volume fraction of 25% of its minimum explosion limit concentration value.

In addition, the measurement range of combustible gas should be 0 to 100 LEL, and the measurement range of linear combustible gas should be 0 to 5LEL · m. The combustible gas alarm must be able to detect at least the gas concentration value within the lower explosive limit of combustible gas, that is to say, the measurement range can be greater than or equal to the above range value, but not less than this range.

combustible gas alarm generally includes fixed combustible gas alarm and portable combustible gas alarm, the latter can be divided into diffusion type portable combustible gas alarm and pump suction type portable combustible gas alarm.When selecting, it should be selected according to the working conditions of the site and its own needs. Regardless of the type of combustible gas detector, when the combustible gas concentration value reaches or exceeds the first alarm value, it should be able to send out an audible and visual alarm for 30~60s. Operators should be forced ventilation for at least half an hour after evacuation, and then the specific location and cause of combustible gas leakage should be checked by professionals.

In summary, it is the first-level alarm setting value of the combustible gas alarm. According to the current national regulations, the low report of combustible gas alarm is generally set at 25% LEL and the high report is set at 50% LEL. If you have any questions about the alarm value setting of combustible gas alarm, please call Yiyuntian and we will serve you wholeheartedly!