In today's society, combustible gas alarm has become an indispensable safety equipment in many industrial sites. It can give an alarm in time when the combustible gas leaks, and effectively prevent the occurrence of safety accidents such as fire and explosion. However, to ensure the accuracy and reliability of the alarm, it is very important to set the upper and lower limits of the alarm. Do you know the upper and lower limits of combustible gas alarm ? The following is a brief introduction by Yiyuntian Electronics:

Definition of Alarm Upper and Lower Limits for 1. Combustible Gas Alarm

The upper and lower alarm limits of the combustible gas alarm, it means that when the concentration of combustible gas reaches or exceeds a certain value, the alarm will issue an alarm to remind people to take corresponding measures. This specific value is usually based on the explosion limit of combustible gas (LEL,Lower Explosive Limit) to set.

Lower Explosive Limit (LEL): refers to the lowest concentration of combustible gas in the air that can explode when exposed to open flame.

lower alarm limit: usually set to a certain 1 percentage of combustible gas concentration reaching the lower explosive limit, such as 25% LEL. When the gas concentration reaches or exceeds this 1 value, the alarm will give a low limit alarm.

Alarm upper limit: Generally set to a higher percentage of combustible gas concentration reaching the lower explosive limit, such as 50% LEL or higher. When the gas concentration reaches or exceeds this 1 value, the alarm will issue a high limit alarm, indicating that the situation is more urgent.

How to Set the 2. Alarm Limit