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Thermistor Values for Unified 2 Firmware

Below is a listing from the Marlin base that we are using for the Unified 2 Firmware. Any of the thermistor numbers below can be entered into the “KNOWN_XXXXXXX_THERMISTOR_VALUE” in our firmware if you are using one that is not standard to your machine. You will also need to uncomment the “KNOWN_XXXXXXX_THERMISTOR” option to enable the use of the specified thermistor number.

Special wiring and/or pin changes may be required for some thermistors depending on what board and/or thermistor you are using. Refer to the thermistor seller/manufacturer documentation on what value to use and how to connect it to your 3D printer.

This page is provided for reference only.

/**
 * --NORMAL IS 4.7kΩ PULLUP!-- 1kΩ pullup can be used on hotend sensor, using correct resistor and table
 *
 * Temperature sensors available:
 *
 *  SPI RTD/Thermocouple Boards - IMPORTANT: Read the NOTE below!
 *  -------
 *    -5 : MAX31865 with Pt100/Pt1000, 2, 3, or 4-wire  (only for sensors 0-1)
 *                  NOTE: You must uncomment/set the MAX31865_*_OHMS_n defines below.
 *    -3 : MAX31855 with Thermocouple, -200°C to +700°C (only for sensors 0-1)
 *    -2 : MAX6675  with Thermocouple, 0°C to +700°C    (only for sensors 0-1)
 *
 *  NOTE: Ensure TEMP_n_CS_PIN is set in your pins file for each TEMP_SENSOR_n using an SPI Thermocouple. By default,
 *        Hardware SPI on the default serial bus is used. If you have also set TEMP_n_SCK_PIN and TEMP_n_MISO_PIN,
 *        Software SPI will be used on those ports instead. You can force Hardware SPI on the default bus in the
 *        Configuration_adv.h file. At this time, separate Hardware SPI buses for sensors are not supported.
 *
 *  Analog Themocouple Boards
 *  -------
 *    -4 : AD8495 with Thermocouple
 *    -1 : AD595  with Thermocouple
 *
 *  Analog Thermistors - 4.7kΩ pullup - Normal
 *  -------
 *     1 : 100kΩ  EPCOS - Best choice for EPCOS thermistors
 *   331 : 100kΩ  Same as #1, but 3.3V scaled for MEGA
 *   332 : 100kΩ  Same as #1, but 3.3V scaled for DUE
 *     2 : 200kΩ  ATC Semitec 204GT-2
 *   202 : 200kΩ  Copymaster 3D
 *     3 : ???Ω   Mendel-parts thermistor
 *     4 : 10kΩ   Generic Thermistor !! DO NOT use for a hotend - it gives bad resolution at high temp. !!
 *     5 : 100kΩ  ATC Semitec 104GT-2/104NT-4-R025H42G - Used in ParCan, J-Head, and E3D, SliceEngineering 300°C
 *   501 : 100kΩ  Zonestar - Tronxy X3A
 *   502 : 100kΩ  Zonestar - used by hot bed in Zonestar Průša P802M
 *   512 : 100kΩ  RPW-Ultra hotend
 *     6 : 100kΩ  EPCOS - Not as accurate as table #1 (created using a fluke thermocouple)
 *     7 : 100kΩ  Honeywell 135-104LAG-J01
 *    71 : 100kΩ  Honeywell 135-104LAF-J01
 *     8 : 100kΩ  Vishay 0603 SMD NTCS0603E3104FXT
 *     9 : 100kΩ  GE Sensing AL03006-58.2K-97-G1
 *    10 : 100kΩ  RS PRO 198-961
 *    11 : 100kΩ  Keenovo AC silicone mats, most Wanhao i3 machines - beta 3950, 1%
 *    12 : 100kΩ  Vishay 0603 SMD NTCS0603E3104FXT (#8) - calibrated for Makibox hot bed
 *    13 : 100kΩ  Hisens up to 300°C - for "Simple ONE" & "All In ONE" hotend - beta 3950, 1%
 *    15 : 100kΩ  Calibrated for JGAurora A5 hotend
 *    18 : 200kΩ  ATC Semitec 204GT-2 Dagoma.Fr - MKS_Base_DKU001327
 *    22 : 100kΩ  GTM32 Pro vB - hotend - 4.7kΩ pullup to 3.3V and 220Ω to analog input
 *    23 : 100kΩ  GTM32 Pro vB - bed - 4.7kΩ pullup to 3.3v and 220Ω to analog input
 *    30 : 100kΩ  Kis3d Silicone heating mat 200W/300W with 6mm precision cast plate (EN AW 5083) NTC100K - beta 3950
 *    60 : 100kΩ  Maker's Tool Works Kapton Bed Thermistor - beta 3950
 *    61 : 100kΩ  Formbot/Vivedino 350°C Thermistor - beta 3950
 *    66 : 4.7MΩ  Dyze Design High Temperature Thermistor
 *    67 : 500kΩ  SliceEngineering 450°C Thermistor
 *    70 : 100kΩ  bq Hephestos 2
 *    75 : 100kΩ  Generic Silicon Heat Pad with NTC100K MGB18-104F39050L32
 *  2000 : 100kΩ  Ultimachine Rambo TDK NTCG104LH104KT1 NTC100K motherboard Thermistor
 *
 *  Analog Thermistors - 1kΩ pullup - Atypical, and requires changing out the 4.7kΩ pullup for 1kΩ.
 *  -------                           (but gives greater accuracy and more stable PID)
 *    51 : 100kΩ  EPCOS (1kΩ pullup)
 *    52 : 200kΩ  ATC Semitec 204GT-2 (1kΩ pullup)
 *    55 : 100kΩ  ATC Semitec 104GT-2 - Used in ParCan & J-Head (1kΩ pullup)
 *
 *  Analog Thermistors - 10kΩ pullup - Atypical
 *  -------
 *    99 : 100kΩ  Found on some Wanhao i3 machines with a 10kΩ pull-up resistor
 *
 *  Analog RTDs (Pt100/Pt1000)
 *  -------
 *   110 : Pt100  with 1kΩ pullup (atypical)
 *   147 : Pt100  with 4.7kΩ pullup
 *  1010 : Pt1000 with 1kΩ pullup (atypical)
 *  1047 : Pt1000 with 4.7kΩ pullup (E3D)
 *    20 : Pt100  with circuit in the Ultimainboard V2.x with mainboard ADC reference voltage = INA826 amplifier-board supply voltage.
 *                NOTE: (1) Must use an ADC input with no pullup. (2) Some INA826 amplifiers are unreliable at 3.3V so consider using sensor 147, 110, or 21.
 *    21 : Pt100  with circuit in the Ultimainboard V2.x with 3.3v ADC reference voltage (STM32, LPC176x....) and 5V INA826 amplifier board supply.
 *                NOTE: ADC pins are not 5V tolerant. Not recommended because it's possible to damage the CPU by going over 500°C.
 *   201 : Pt100  with circuit in Overlord, similar to Ultimainboard V2.x
 *
 *  Custom/Dummy/Other Thermal Sensors
 *  ------
 *     0 : not used
 *  1000 : Custom - Specify parameters in Configuration_adv.h
 *
 *   !!! Use these for Testing or Development purposes. NEVER for production machine. !!!
 *   998 : Dummy Table that ALWAYS reads 25°C or the temperature defined below.
 *   999 : Dummy Table that ALWAYS reads 100°C or the temperature defined below.
 *
 */
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