Self-metering system and testing device with casing and sliding member to cut-off and set sample volume

A testing system, comprising:

• a testing cartridge including a casing defining a casing opening, and a sliding member defining a sliding member opening, the casing opening or the sliding member opening defining a specified volume, the casing opening and the sliding member opening collectively defining a sample application region dimensioned to accommodate receiving an amount of sample exceeding the specified volume, wherein the sliding member is movable transversely to the casing opening by having the sliding member and the casing traverse across each other's respective openings to remove excess sample from the received amount of sample and retain the specified volume from the received amount of sample, wherein the testing cartridge further includes an actuation mechanism, wherein the actuation mechanism includes an engaging member for engaging the sliding member for the transverse movement of the sliding member and a receiving member for receiving an actuation force for movement of the actuation mechanism;
• a receiving interface for receiving of the testing cartridge;
• and
• a second actuation member in the receiving interface for engaging the receiving member of the actuation mechanism for moving of the sliding member.