PT1000 Thermistor E3D

E3D PT1000 Thermistor Cartridge — 500°C RTD Temperature Sensor, 3×15mm, Molex Microfit 3.0, No Amplifier Required

The E3D PT1000 is a precision RTD (Resistance Temperature Detector) temperature sensor in a 3×15mm cartridge format — the standard form factor for E3D V6, Volcano, and compatible heatblocks. Unlike a PT100, which requires a dedicated amplifier board (MAX31865 or equivalent) to interface with your printer's control board, the PT1000 connects directly to any standard thermistor input pin using a 4.7kΩ pullup resistor — the same pullup already present on most 3D printer boards. No additional hardware. No amplifier. Drop-in replacement for any NTC thermistor in a 3mm cartridge mount, with a temperature ceiling of 500°C and significantly better accuracy than NTC thermistors at high temperatures.

⚠️ Requires 4.7kΩ pullup at the thermistor input. Most standard 3D printer boards (Octopus, Spider, SKR series, Duet) have this pullup onboard or via jumper. Verify your board's thermistor input configuration before connecting.
⚠️ Klipper sensor type: PT1000 — not NTC 100K. Update your sensor_type in printer.cfg after installation.
⚠️ Some BTT boards (e.g. SKR3-EZ) use 2.2kΩ pullup when jumpered for PT1000. In that case use sensor_type: Generic 3950 with appropriate resistance table, or configure for 2.2kΩ pullup explicitly.

PT1000 vs NTC Thermistor — Why It's Worth Upgrading

NTC (Negative Temperature Coefficient) thermistors are the default in most 3D printer hotends because they're cheap and easy to interface. But they have two significant weaknesses: their resistance-to-temperature curve is highly non-linear, meaning firmware accuracy degrades at temperature extremes, and most NTC thermistors are rated only to 280–300°C, with accuracy degrading above 250°C. The PT1000 is a Platinum RTD — its resistance changes linearly and predictably with temperature, delivering accurate readings from room temperature to 500°C without the curve fitting issues that affect NTC sensors at high temps. For anyone printing PEEK, PEI, high-temperature Nylons, or any material pushing past 300°C, the PT1000 is the sensor that gives you accurate, reliable temperature feedback where an NTC thermistor's accuracy has already deteriorated.

PT1000 vs PT100 — Same Accuracy, No Amplifier Board Required

PT100 RTDs offer the same linear accuracy as PT1000s, but their low base resistance (~100Ω at 0°C) makes them susceptible to cable resistance errors and requires a dedicated signal amplifier chip (MAX31865) to interface with standard microcontrollers. The PT1000 solves this by operating at 1000Ω base resistance — ten times higher — which makes cable resistance effects negligible and allows direct connection to a standard 4.7kΩ thermistor input. You get PT100-class accuracy without the amplifier board, without the extra wiring, and without the firmware configuration complexity.

No Fiberglass Sleeving — Silicone-Insulated Cable

Standard E3D NTC thermistors use fiberglass sleeving on the lead wires — functional, but stiff and prone to fraying over time with repeated toolhead movement. The PT1000 uses silicone-insulated leads that remain flexible at operating temperatures and hold up better to the continuous flex of a moving toolhead. The 50mm lead terminates in a Molex Microfit 3.0 connector, matching the standard E3D wiring ecosystem, with an extension cable included to reach your controller without additional splicing.

Klipper Configuration

Add the following to your [extruder] section in printer.cfg:

sensor_type: PT1000
sensor_pin: # your thermistor pin
pullup_resistor: 4700

For boards with a 2.2kΩ pullup (some BTT boards jumpered for PT1000): consult your board's documentation and adjust pullup_resistor accordingly, or use the standard 4.7kΩ input without the PT1000 jumper.

Specifications

What's Included

When Do You Need This?

The PT1000 is the right choice when you're pushing past the reliable range of a standard NTC thermistor — specifically when printing materials above 280°C, when you want more accurate temperature readback for fine-tuned pressure advance and input shaper calibration, or when you're building or upgrading a hotend for engineering-grade materials. It's also the straightforward upgrade path for anyone who wants PTD-class accuracy without the additional hardware that a PT100 setup requires. If your current NTC thermistor is failing or you want a more accurate, longer-lasting sensor for a high-performance build, this is the direct replacement with meaningful benefits beyond what a generic NTC replacement provides.

Browse our full thermistor and heating component selection at Thermistors & Heating, or explore all hotend upgrades at 3D Printer Upgrades.