Ultra Precision Interchangeable Thermistors 0.05°C Accuracy

Ultra Precision Interchangeable Thermistors
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U.S. Sensor's ultra precision interchangeable thermistors are highly accurate, stable devices designed specifically for temperature sensing and control applications. They are particularly suited for uses where their precision interchangeability eliminates the necessity for costly individual circuit calibration.


  • High accuracy
  • Fast thermal response
  • Long life
  • R/T Curve-matched
  • Epoxy encapsulated
  • High stability
  • Small size


  • Special lead materials and lengths
  • Special encapsulants or probe housings
  • Non-standard resistance values and tolerances


  • Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
  • Dissipation constant: 1 mW/°C
  • Maximum power rating: 30 mW at 25°C derated to 1 mW at 125°C
  • Interchangeability tolerance of ±0.05°C from 0-50°C
  • Operating temperature: -55°C to +80°C
  • Storage and operation temperatures for best long term stability: -55° to +50°C

Thermistor Diagram
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Part Number (±0.05°C 0-50°C ) Resistance Ohms @25°C R-T Curve Beta (K) 0-50°C Download/view
PR222J2 2,252 J 3,890 Drawing R-T Data
PR302J2 3,000 J 3,890 Drawing R-T Data
PR502J2 5,000 J 3,890 Drawing R-T Data
PR103J2 10,000 J 3,890 Drawing R-T Data
PR203J2 20,000 J 3,890 Drawing R-T Data
PR303J2 30,000 J 3,890 Drawing R-T Data
PR503J2 50,000 J 3,890 Drawing R-T Data


The information contained herein is believed to be accurate. The user, however, should verify the suitability of a particular product for a specific application. U.S. Sensor Corp. does not warrant the accuracy of this information, and disclaims any liability with respect to its use.

U.S. Sensor Corp.
(800) 777-6467
Contact U.S. Sensor 800-777-6467sales.ussensor@littelfuse.com