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 Sensor Scientific standard bead thermistors offer the advantages of small size and mass, fast thermal response time, extreme sensitivity to current and voltage changes, and high stability. Typical applications include fluid flow and fluid level measurement, thermal conductivity measurement, gas analysis, and small surface area temperature measurement.
FEATURES: - SUPERIOR STABILITY
- HERMETIC GLASS COATING
- LOW THERMAL MASS
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:6 SEC. TYP. IN STILL AIR
- DISSIPATION CONSTANT: 0.35mW/°C IN STILL AIR
- MAXIMUM OPERATING TEMPERATURE: 300°C.
- STANDARD RESISTANCE TOLERANCE: ±20%
STANDARD BEAD THERMISTORS MECHANICAL AND THERMAL PROPERTIES | | BODY DIMENSIONS | | Diameter, nominal | inches | 0.043 | | | mm | 1.1 | | | | Length, nominal | inches | 0.087 | | | mm | 2.2 | LEAD WIRES
Material: Platinum Alloy | | Diameter, nominal | inches | 0.004 | | | mm | 0.01 | | | | Length, minimum | inches | 0.375 | | | mm | 9.5 | | THERMAL PROPERTIES | | Time constant, still air | sec. | 6 | | Dissipation constant, still air | mW/°C | 0.35 |
PART NUMBER SPECIFICATION: To specify a part number, the following sequence should be used: S43A10320 specifies a small bead thermistor with adjacent leads, 10000 ohms at 25 Deg. C., with a resistance tolerance of ±20%. S43A10320 indicates small bead thermistor, .043" (1.1mm) nominal diameter S43A10320 indicates lead configuration A: Adjacent leads B: Opposite leads S43A10320 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. S43A10320 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%. Resistance Ratio Table | Resistance at 25 Deg. C.1 | Beta25-125 | R25/R125 | a at 25 Deg. C.2 | Part Number3 | | ohms | Deg. Kelvin | Ratio | %/°C | Adjacent Leads | Opposite Leads | | 500 | 3330 | 16.5 | -3.60% | S43A50120 | S43B50120 | | 1000 | 3550 | 19.8 | -3.88% | S43A10220 | S43B10220 | | 2500 | 3550 | 19.8 | -3.88% | S43A25220 | S43B25220 | | 5000 | 3690 | 22.4 | -4.04% | S43A50220 | S43B50220 | | 10000 | 4015 | 29.4 | -4.40% | S43A10320 | S43B10320 | | 25000 | 4015 | 29.4 | -4.40% | S43A25320 | S43B25320 | | 50000 | 4400 | 31.5 | -4.49% | S43A50320 | S43B50320 | "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. |
