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NASA Qualified epoxy encapsulated precision interchangeable NTC thermistors for use in extended space flight applications.  All parts are fully flight tested and characterized. Line re-qualified yearly per MIL-PRF-23648 requirements as specified in GSFC S-311-P-18 document. All GSFC S-311-P-18 (S311P18) lead options wire options available.


  • Flight Qualified
  • 2252 Ohm to 30K Ohm Resistance @ 25°C
  • Interchangeability to ±0.1°C
  • Excellent High Temperature Performance
  • High Sensitivity
  • Thermally Conductive Epoxy Coating Exhibits <0.66% TML, <0.01% CVCM, 0.10% WVR when tested per ASTM E-595-90 


  • Extended Space Applications
  • Low and Mid Range Temperature Applications
  • Tight Tolerance Instrumentation
  • Applications Requiring Sensing Small Changes in Temperature
  • Applications with Out-gassing Requirements  

Please review product documents or contact us for the latest agency approval information.  

Product Type Features

  • Model Number  44900 Series

  • Sensor Type  NTC Thermistor

Body Features

  • Wire Connection  Open End


  • Wire Length 76 mm [ 2.964 in ]

  • Diameter 2.4 mm [ .094 in ]

  • Length 76 mm [ 2.964 in ]

Usage Conditions

  • Ambient Temperature Range 100 °C [ 212 °F ]

  • T_ref for Resistance (°C) 25 °C

  • Tolerance Class  Range

  • Temperature Accuracy (°C) ± .1 from 0 – 70


  • Wire/Cladding Connection  32 AWG (.2mm) Alloy 180 Tin Plated

  • Tolerance β-Value with unit as % (%) .3

Packaging Features

  • Package  Epoxy Radial Discrete

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