This thermistor and ceramic heater combo delivers precise temperature monitoring and control for your Snapmaker U1 hotend. Seamless Compatibility – Replacement filament breakage detector designed for a perfect fit with the Snapmaker U1 Instant Detection – Accurately senses filament breakage or run-out in real time, so you're always the first to know before a print goes wrong. Smart Pause Alerts – Automatically triggers a pause notification the moment an issue is detected, eliminating wasted time and material from failed prints. Built for Long Runs – Consistent, stable sensing performance you can count on through extended print sessions without interruption. Tool-Free Installation – Standard drop-in design means you can swap it in without any complex setup or adjustments — just fit and print. What is Included: 1x Compatible Snapmaker U1 Filament Break Sensor Detector PCB Compatibility Snapmaker U1 Documentation: Replacement Guide on Snapmaker Wiki