Systems for immunoassay tests

An apparatus for loading and releasing at least one probe having a rod-shaped portion, comprising:

• a groove unit having a groove along a vertical direction configured to hold the rod-shaped portion of the probe along the vertical direction;
• and
• a push pin configured to move along a horizontal direction, the push pin being capable of residing at a first position and a second position;
• wherein a tip of the push pin is capable of pressing the rod-shaped portion of the probe against the groove when the push pin resides at the first position;
• and
• the distance between the tip of the push pin and the groove is larger than a diameter of the rod-shaped portion of the probe when the push pin resides at the second position.

An apparatus for loading and releasing a plurality of probes, each probe of the plurality of probes having a rod-shaped portion having a common diameter, the apparatus comprising:

• a plurality of pairs of groove unit and push pin, each pair comprising:
• a groove unit having a groove along a vertical direction configured to hold the rod-shaped portion of the probe along the vertical direction;
• and
• a push pin configured to move along a horizontal direction, the push pin being capable of residing at a first position and a second position;
• wherein the tip of the push pin is capable of pressing the rod-shaped portion of the probe against the groove when the push pin resides at the first position;
• the distance between the tip of the push pin and the groove is larger than the common diameter of the rod-shaped portion of the probe when the push pin resides at the second position;
• and
• the push pins of the pairs are mechanically coupled so that the push pins move along the horizontal direction simultaneously.