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Sensor Scientific glass probe thermistors are extremely useful in applications that require high stability and ruggedness. The availability of 4 standard outer diameters offers the designer the flexibility to fit the thermistor to the design, rather than compromising the design to accommodate the thermistor. The SP43A style (0.043"/ 1.09mm diameter) provides the small size advantages of the industry-standard large bead (.042" /1.07mm) thermistor without the associated handling problems. Typical applications include fluid flow and fluid level measurement, thermal conductivity measurement, temperature measurement, and temperature compensation.

thermistor stability

FEATURES:
• SUPERIOR STABILITY
• HERMETICALLY SEALED GLASS ENCAPSULATION
• ROBUST CONSTRUCTION
OPTIONS:
• CUSTOM LEAD LENGTHS
• NON-STANDARD RESISTANCE TOLERANCES
• NON-STANDARD RESISTANCE VALUES
• PRECISION CALIBRATION AT MULTIPLE TEMPERATURES
• CUSTOM VALUE-ADDED ASSEMBLY OPTIONS
SPECIFICATIONS:
• TIME CONSTANT: 5 TO 21 SEC. TYP. IN STILL AIR, DEPENDING ON TYPE
• DISSIPATION CONSTANT: 0.4 TO 1.0 mW/°C IN STILL AIR, DEPENDING ON TYPE
• MAXIMUM OPERATING TEMPERATURE: 300°C.
• STANDARD RESISTANCE TOLERANCE: ±20%
MECHANICAL AND THERMAL PROPERTIES
THERMISTOR TYPE   SP43A SP60A SP80A SP100A
GLASS DIMENSIONS
Diameter, nominal (D) inches 0.043 0.060 0.080 0.100
  mm 1.09 1.52 2.03 2.54
Length, nominal (L)
standard inches 0.1 0.25 0.25 0.25
  mm 2.54 6.35 6.35 6.35
standard inches ---- 0.5 0.5 0.5
  mm ---- 12.7 12.7 12.7
custom inches none 0.75 & 1.0 0.75 to 2.0 0.75 to 2.0
  mm none 19 & 25.4 19 to 50.8 19 to 50.8
LEAD WIRES
Material: Tinned Dumet2          
Diameter, nominal (d) inches 0.008 0.008 0.0126 0.0126
  mm 0.20 0.20 0.32 0.32
Length, nominal (l) inches 1.5 - 2.0 1.5 - 2.0 1.5 - 2.0 1.5 - 2.0
  mm 38 - 51 38 - 51 51 51
THERMAL PROPERTIES
Time constant, still air sec. 5 10 15 21
Dissipation constant, still air mW/°C 0.4 0.7 0.8 1
 
Note 2: Bare (not tinned) Dumet leads are available as an option

PART NUMBER SPECIFICATION:

To specify a part number, the following sequence should be used:

SP80A103201/2 specifies a glass probe thermistor, .080" (2.03mm) diameter, 10000 ohms at 25 Deg. C., with a resistance tolerance of ±20%, and nominal length of ½" (12.7mm)

  • SP80A103201/2 indicates glass probe thermistor
  • SP80A103201/2 indicates nominal diameter 43A = 0.043" (1.09mm) 80A = 0.080" (2.03mm) 60A = 0.060" (1.52mm) 100A = 0.100" (2.54mm)
  • SP80A103201/2 indicates zero power resistance at 25°C. The first two digits indicate significant figures, and the last digit indicates the number of zeros following the significant figures. In this example, "103" represents 10000 ohms.
  • SP80A103201/2 indicates the resistance tolerance at 25°C, expressed in ±%. In this example, ±20" indicates the standard tolerance of ±20%. Other typical tolerances include ±1%, 2%, 5%, 10%, 15%, 20%, and 30%.
  • SP80A103201/2 indicates the nominal body length. 1/4 = 0.25" (6.4mm) 1/1 = 1.00" (25.6mm) 1/2 = 0.50" (12.7mm) 2/1 = 2.00" (51.2mm)

    • (Note: The SP43A is available only in a 0.1" (2.5mm) length. The length term is omitted in the SP43A part number)

     

    "The information contained herein is believed to be accurate. The user, however, should verify the suitability of a particular procuct for a specific application. Senor Scientific, Inc. does not warrant the accuracy of this information, and disclaims any liability with respect to its use."

    © Sensor Scientific, Inc.