3D Printer Thermocouple | M3/M4 Screw-In Probe | Waterproof K Type PTFE Cable

This 3D printer screw thermocouple gives you faster, more direct temperature readings from your hotend. The K-type sensor is in a threaded M3 or M4 screw. It mounts right into the heater block for better heat transfer and accuracy. Features and Benefits - Screw-in design - The M3/M4 threaded body secures into a heater block. Bead thermistors can move or lose contact. - Copper probe housing - Copper moves heat quickly. The thermocouple reacts faster to temperature changes in your 3D printer hotend. - K-type sensor element - It works over a wider range and responds quicker than a standard thermistor. This helps with high-temp filaments. - PTFE insulated cable - The flexible, waterproof cable protects the wiring. It resists wear and heat as the print head moves. Applications - Hotend upgrades - It replaces a stock thermistor for more stable, accurate temperature control. This is good for popular printers. - High-temperature printing - It’s a good choice for materials like polycarbonate or nylon. These need steady heat above 260°C. - Custom printer builds - The threaded design is easy to put into custom-machined heater blocks for DIY or special machines. What It Is This is a K Type Thermocouple Temperature Sensor, specifically designed as a screw-in probe. It features a copper probe with either an M3 or M4 screw thread. The cable is made from PTFE, offering water resistance. This product is a single thermocouple, suitable for various temperature sensing applications where a secure, screw-in connection is required. It comes with a choice of 0.5m or 1m cable length. Key Uses & Applications This K Type Thermocouple is primarily used for accurate temperature measurement. Its screw-in design allows for secure installation in equipment where a fixed temperature sensor is needed, such as in 3D printers, as indicated by the product title. The water resistance of the PTFE cable makes it suitable for environments where moisture is present. While this specific product is not for water heaters, thermocouples in general are used to sense pilot flame presence in gas appliances like water heaters and fireplaces. How to Choose When selecting a thermocouple, consider the required screw thread (M3 or M4) for your application to ensure proper fitment. The cable length (0.5m or 1m) should be sufficient to reach your display gauge or temperature controller without strain. The K Type is a common thermocouple type, suitable for a wide range of temperatures. Ensure the screw thermocouple copper probe material is appropriate for the environment it will be used in. Grit / Spec Guide This section is not applicable to a thermocouple. Thermocouples do not have a "grit" or abrasive specification. Instead, key specifications for this product include: - Thermocouple Type: K Type - Cable Material: PTFE - Water Resistance: Yes - Screw Thread: M3/M4 - Probe Type: Screw Thermocouple Copper Probe - Cable Length: 0.5m or 1m Care & Safety For general thermocouple care, ensure the probe and the lead are not bent sharply or subjected to excessive force, as this can damage the internal wiring. The PTFE cable offers water resistance, but avoid submerging the entire unit unless specifically rated for such use. If you are cleaning a water heater thermocouple (which is a different type of thermocouple to this product), you would typically use fine-grit sandpaper or emery cloth to gently remove soot and corrosion, then wipe it clean. This product is not designed for gas fireplace applications.