We’re Everywhere It Matters… Thermistor Options In order to make a radiometric measurement with thermopile detectors, you will need to approximate the thermopile’s cold junction temperature. Dexter offers optional externally mounted thermistors for all models as well as internally mounted thermistors on several of our models. Chip Thermistors (DC-4005) can be mounted internally in our models: “ST”, 2M Quad, TM34, T34, 10-Channel, and SLA32 Array to monitor ambient temperature of the thermopile. Chip-in-Glass (DC-4007) or Bead Thermistors can be mounted externally on all detector packages between detector pins using epoxy. Customers may supply thermistors or choose from Dexter's standard thermistors. The on detector die poly-silicon resistor / thermistor (ST60R) is also shown below. Please contact Dexter Research Center for pricing. Chip Thermistor DC-4005 Dexter part number: DC-4005 (formerly MT04) Thermometrics P/N: HM25NH3030J Description: 30k Ω 5% H-curve chip thermistor Resistance @ 25°C: 30,000 Ω Tolerance on resistance @ 25°C: +/-5% Resistance ratio (R0°C/R70°C): 17.75 Dimensions (width, length, thick) inches: .025 x .025 x .010 DC-4005 Resistance as a function of temperature 1,000,000 Ohms 100,000 10,000 363,300.0 273,420.0 207,600.0 158,910.0 122,580.0 95,355.0 74,655.0 58,857.0 46,716.0 37,320.0 30,000.0 24,261.0 19,734.0 16,140.0 13,272.0 10,971.0 9,114.0 7,605.0 6,378.0 5,372.4 4,544.4 3,860.4 3,292.2 2,818.8 2,422.2 2,089.2 1,808.1 1,000 -30 -20 -10 0 10 20 30 40 50 60 70 80 DC-4005 Degree C Ohms -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 363,300.0 273,420.0 207,600.0 158,910.0 122,580.0 95,355.0 74,655.0 58,857.0 46,716.0 37,320.0 30,000.0 24,261.0 19,734.0 16,140.0 13,272.0 10,971.0 9,114.0 7,605.0 6,378.0 5,372.4 4,544.4 3,860.4 3,292.2 2,818.8 2,422.2 2,089.2 1,808.1 90 100 110 120 Degrees C xxii 8592 Rev E Update: 12/20/06 Information subject to change without notice Dexter Research Center • 7300 Huron River Drive • Dexter, MI 48130 • www.DexterResearch.com • +1 734 426 3921 We’re Everywhere It Matters… Chip-in-Glass Thermistor DC-4007 DC-4007 Dexter part number: DC-4007 (formerly MT06) Thermometrics P/N: GC32KB203 Description: 20k Ω 5% B-curve Chip-in-Glass thermistor Resistance @ 25°C: 20,000 Ω Tolerance on resistance @ 25°C: +/-5% Resistance ratio (R0°C/R70°C): 18.77 Dimensions (diameter, length) inches: Ø.033 x .084 DC-4007 Resistance as a function of temperature 1,000,000 111,697.6 85,271.8 65,667.5 50,992.2 39,911.7 31,476.2 25,003.8 20,000.0 16,103.7 13,048.7 10,637.6 8,722.5 7,192.0 5,961.9 4,967.5 4,159.4 3,499.2 2,957.2 2,510.1 2,139.6 1,831.1 1,573.3 1,356.8 1,174.3 1,020.0 888.9 777.2 681.6 599.6 529.0 468.1 415.3 369.4 329.4 Ohms 100,000 10,000 1,000 294.5 Degree C Ohms -10 -5 0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 115 120 125 130 135 140 145 150 155 160 111,697.6 85,271.8 65,667.5 50,992.2 39,911.7 31,476.2 25,003.8 20,000.0 16,103.7 13,048.7 10,637.6 8,722.5 7,192.0 5,961.9 4,967.5 4,159.4 3,499.2 2,957.2 2,510.1 2,139.6 1,831.1 1,573.3 1,356.8 1,174.3 1,020.0 888.9 777.2 681.6 599.6 529.0 468.1 415.3 369.4 329.4 294.5 100 -10 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 Degrees C 8592 Rev E Update: 12/20/06 Information subject to change without notice Dexter Research Center • 7300 Huron River Drive • Dexter, MI 48130 • www.DexterResearch.com • +1 734 426 3921 xxiii We’re Everywhere It Matters… Thermistor ST60R Dexter part number: ST60R Description: 30kΩ 20% on detector die thermistor, poly-silicon curve .07%±.003%/°C [ΔR/(R*ΔT)] Resistance @ 23°C: 30,000Ω Tolerance on resistance @ 23°C: +/-20% Resistance ratio (R0°C/R70°C): .953 Dimensions inches: NA` ST60R ST60R Resistance as a function of temperature 34,000 33,000 Ohms 32,000 31,592 31,489 31,385 31,282 31,179 31,075 30,972 30,868 30,765 30,662 30,558 30,455 30,352 30,248 30,145 30,041 30,000 29,938 29,835 29,731 29,628 29,524 31,000 30,000 29,000 Degree C Ohms 0 5 10 15 20 23 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 29,524 29,628 29,731 29,835 29,938 30,000 30,041 30,145 30,248 30,352 30,455 30,558 30,662 30,765 30,868 30,972 31,075 31,179 31,282 31,385 31,489 31,592 28,000 0 10 20 30 40 50 60 70 80 90 100 110 Degrees C xxiv 8592 Rev E Update: 12/20/06 Information subject to change without notice Dexter Research Center • 7300 Huron River Drive • Dexter, MI 48130 • www.DexterResearch.com • +1 734 426 3921 We’re Everywhere It Matters… Thermistor ST150R Dexter part number: ST150R Description: 75kΩ 20% on detector die thermistor, poly-silicon curve .06%±.003%/°C [ΔR/(R*ΔT)] Resistance @ 23°C: 75,000Ω Tolerance on resistance @ 23°C: +/-20% Resistance ratio (R0°C/R70°C): .957 Dimensions inches: NA ST150R ST150R Resistance as a function of temperature Degree C 0 5 10 15 20 23 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 79,000 78,635 78,399 78,163 78,000 77,927 77,691 77,455 77,219 77,000 76,983 76,747 Ohms 76,511 76,274 76,038 76,000 75,802 75,566 75,330 75,094 75,000 74,858 75,000 74,622 74,386 74,150 74,000 73,914 Ohms 73,914 74,150 74,386 74,622 74,858 75,000 75,094 75,330 75,566 75,802 76,038 76,274 76,511 76,747 76,983 77,219 77,455 77,691 77,927 78,163 78,399 78,635 73,000 0 10 20 30 40 50 60 70 80 90 100 110 Degrees C 8592 Rev E Update: 12/20/06 Information subject to change without notice Dexter Research Center • 7300 Huron River Drive • Dexter, MI 48130 • www.DexterResearch.com • +1 734 426 3921 xxv