Apparatus for monitoring, regulating, or controlling fluid flow

A drip chamber system comprising:

• a downstream tube comprising:
• a length of tubing including a first portion defining a first length;
• and
• an anti-pinch member having a second portion defining a second length, the anti-pinch member being coupled to the first portion of tubing, the first length being greater than the second length, the anti-pinch member being configured to inhibit point contacts from forming within the second portion, wherein upon application of a force to the anti-pinch member, a flow rate through the anti-pinch member is restricted in a linearized response to the application of the force;
• a drip chamber housing defining a fluid chamber;
• and
• a cap coupled to the drip chamber, the downstream tube being coupled to the cap, the cap being in fluid communication with the fluid chamber.