A Metering Stack and System for Collecting a Target Sample for Testing

A testing system for collecting a target sample for testing, the testing system comprising:

• a metering stack comprising:
• a top layer;
• a bottom layer;
• and
• a channel layer spacing the top layer from the bottom layer,
• wherein the top layer, the bottom layer, and the channel layer together define a channel having an inlet end for receiving the target sample, a main channel portion connected to the inlet end, a separation portion connected to main channel portion,
• and one or more dispensing portions connected to the separation portion, and
• wherein a vent is defined within the metering stack proximate the separation portion of the channel, the vent having a first wall and a curved wall, the first wall extending between a first end and a second end, the curved wall extending between the first and second ends, the first wall being at an angle relative to a main axis of the main channel portion, the vent allowing air to enter the metering stack into the separation portion;
• and
• a reader configured to at least partially receive the one or more dispensing portions of the metering stack.

A metering stack for collecting a target sample for testing, the metering stack comprising:

• a top layer;
• a bottom layer;
• and
• a channel layer spacing the top layer from the bottom layer in a vertical direction,
• wherein the top layer, the bottom layer, and the channel layer together define a channel having an inlet end for receiving the target sample, one or more dispensing portions configured to receive the target sample from the inlet end, and a connecting portion connected between the inlet end and each of the one or more dispensing portions in a longitudinal direction to guide the target sample from the inlet end to each of the one or more dispensing portions, and
• wherein the channel layer is at least partially spaced apart from one or both of the top layer and the bottom layer in the longitudinal direction at the inlet end.