H2 Sensor
Hydrogen sensor triggers at 25% of LFL which is 1% hydrogen concentration. It has a delayed respond for about 15 seconds.
![H2 Sensor](http://static.viaaurea.eu/t/horizoneducational.com/images/1100.png/o-h:600/s-c0d36126b41a?_ts=1585172985)
Hydrogen sensor triggers at 25% of LFL which is 1% hydrogen concentration. It has a delayed respond for about 15 seconds.