Cartridge for leakage detection sensor

A cartridge for a leak detection sensor, the cartridge comprising:

• a reaction material;
• a housing including a mounting space portion inside thereof and an opening portion disposed at a lower portion of the housing, the reaction material being mounted in the mounting space portion, the housing having a plurality of openings configured to allow a leaked oil to flow toward the reaction material, and the plurality of openings being disposed around the opening portion by a predetermined distance of space between each of the plurality of opening;
• and
• a separation prevention plate being disposed at the opening portion of the housing, the separation prevention plate being configured to prevent a separation of the reaction material from the mounting space portion, wherein the reaction material includes powder;
• wherein locking steps are disposed inside the housing and disposed at opposite sides with respect to the plurality of openings, thereby preventing a separation of the separation prevention plate from the opening portion of the housing.