Tanks and Manholes | Pioneer of a gas alarm gas detector / alarm - Riken Keiki Co., Ltd.

Tanks and Manholes


Manholes, stormwater pits and raw water tanks at sewage treatment plants can easily cause oxygen deficiency and hydrogen sulfide (H2S) poisoning from decomposing organic matter.

There is a high possibility of encountering drowning accidents that workers faint and fall into the confined spaces as a consequence of one breath of oxygen lacked air or highly concentrated hydrogen sulfide (H2S).