Extruder vent flow sensor

A system to mitigate vent flow into a vent attachment on an extruder vent of an extruder, the vent attachment having a vent attachment port configured to release gases from the extruder vent, the system comprising:

• a temperature probe having a free end and a fastened end, the free end located in the vent attachment port, the fastened end being communicatively coupled to a programmable logic controller (PLC);
• a cooling jacket configured to cool a region of the vent attachment adjacent the temperature probe so as to reduce an operating temperature of the region and of the temperature probe, the operating temperature being below that of material when it flows out of the extruder vent;
• and
• the PLC configured to determine a rate of temperature increase of the temperature probe exceeding a predetermined threshold rate that indicates presence of the material in the vent attachment port, and initiate a mitigation response when the predetermined threshold rate is exceeded.