Microfluidic system

A micro-fluidic system, the system comprising:

• a lower substrate;
• an upper substrate opposite to the lower substrate, the upper substrate including a first air injection path;
• and
• a micro-fluidic device interposed between the upper and lower substrates, the micro-fluidic device including a fluidic chamber filled with a fluid and a second air injection path corresponding to the first air injection path,
• wherein the second air injection path includes a first groove on the micro-fluidic device,
• wherein the first air injection path includes a second groove opposite to the first groove, and an air injection pipe is positioned through the second groove,
• wherein a coil spring is disposed on a side surface of the air injection pipe,
• wherein an O-ring is secured to a support unit, disposed at a distal end of the air injection pipe, configured to move with the support unit throughout displacement of the support unit and to block the first groove on the micro-fluidic device, and the size of the O-ring corresponds to that of the first groove, such that a maximum radial extent of the O-ring sits within the first groove,
• wherein the support unit is disposed on the O-ring and the support unit contacts with the O-ring, and
• wherein the fluidic chamber has a reaction region including at least one electrode which detects a degree of reaction with the fluid.