What the Semitec 104GT-2 Thermistor M3 Screw Does

The Semitec 104GT-2 Thermistor M3 Screw is a replacement NTC thermistor for 3D printer heater blocks that use an M3 threaded sensor mount. It provides hotend temperature sensing through a screw-in format with leads that terminate in a 2-pin JST connector.

This replacement thermistor can also be used in place of glass bead type thermistors when there is no air pocket. In that application, the original product information notes that the thermistor can provide more accurate reading.

Key Features and Benefits

• Semitec 104GT-2 NTC thermistor: Uses a widely recognised thermistor type for hotend temperature measurement.
• M3 threaded body: Designed for heater blocks that accept an M3 screw-in thermistor.
• 2-pin JST connector: The thermistor leads terminate with a 2-pin JST connector for straightforward connection in compatible setups.
• Suitable replacement part: Intended as a direct replacement thermistor for compatible heater blocks.
• Alternative to glass bead thermistors: Can be used to replace glass bead type thermistors where no air pocket is present, with the stated benefit of more accurate reading.

Use Cases for 3D Printer Temperature Sensing

This thermistor is suited to hotend repairs, heater block replacements, and maintenance on 3D printers that use an M3 threaded thermistor mount. The screw-in design is useful when a heater block is built for threaded sensor retention rather than cartridge-style or bead-style mounting.

The Semitec 104GT-2 thermistor is also relevant for users upgrading from a glass bead type thermistor in a compatible heater block. Where there is no air pocket, the replacement can be used to improve temperature reading accuracy in the hotend assembly.