Standard Disc Style Features: • Rugged, cost effective design • -50°C to 150°C Operation • Bare or epoxy coated • Values from 100Ω to 20,000Ω • Temperature measurement, control or compensation • High sensitivity to changes in temperature • Other tolerances and options available Standard Disc Style Description: MS standard disc style thermistors are ideal for use in those applications where low cost and a rugged design are desired. Thermistors are available either coated or uncoated and are available in a variety of resistance values, curves and tolerances to suit a wide variety of applications. Contact the factory for specific design or application information or the availability of options. MS Standard Disc Style Thermistors Part Number A (max.) B (max.) C (typ.) in mm in mm in mm D AWG d (mW/˚C) t sec. K 0.360 9.14 0.150 3.81 0.250 6.35 24 9 35 200 K 0.260 6.60 0.160 4.06 0.156 3.96 24 7 20 D2502K10 250 K 0.260 6.60 0.160 4.06 0.156 3.96 24 7 20 D5002K10 500 K 0.215 5.46 0.160 4.06 0.080 2.03 26 5 15 D1003K10 1,000 K 0.150 3.81 0.150 3.81 0.080 2.03 26 3 10 D1003Z10 1,000 Z 0.260 6.60 0.140 3.56 0.156 3.96 24 7 20 D2003Z10 2,000 Z 0.215 5.46 0.140 3.56 0.080 2.03 26 7 20 D2253Z10 2,252 Z 0.215 5.46 0.140 3.56 0.080 2.03 26 5 15 D3003Z10 3,000 Z 0.215 5.46 0.150 3.81 0.080 2.03 26 5 15 D5003Z10 5,000 Z 0.150 3.81 0.140 3.56 0.080 2.03 26 3 10 D1004Z10 10,000 Z 0.150 3.81 0.160 4.06 0.080 2.03 26 3 10 D2004Z10 20,000 Z 0.150 3.81 0.160 4.06 0.080 2.03 26 3 10 R25 (Ω) Matl* D1002K10 100 D2002K10 Standard resistance tolerances available are: ±10%, ±5%, ±2% @25˚C Basic P/N Material Wire Type Tol. Code Example: D1003K10-2 D5003Z10-5-100 56 Temperature Sensor Products precisionsensors.meas-spec.com *See R/T tables on page 57. Point-match Temperature (°C) (only used if other than 25°C) Curve "K" Material, 1000Ω + 2% at 25°C Curve "Z" Material, 5kΩ at 25°C with tolerance rating of ±5% at 100˚C 1711 139th Lane NW Andover, MN 55304 Ph: +1 800.899.9783 12-04-14 www.meas-spec.com MS Resistance vs. Temperature Conversion Table Disc Style NTC Thermistor Material K Z Temperature Coef. @25˚C (α25) -3.9 %/˚C -4.4 %/˚C Resistance Ratio R0/R50 6.93 9.07 Beta (β25/85) 3498 3976 Temperature (˚C) Rt R25 α (%/˚C) Curve Dev. Rt R25 α (%/˚C) Curve Dev. -58 -50 39.46 6.2 8.2 66.75 7.1 5.5 -40 -40 21.68 5.8 6.8 33.56 6.6 4.3 -22 -30 12.38 5.4 5.6 17.67 6.2 3.5 -4 -20 7.389 5.1 4.4 9.697 5.8 2.7 14 -10 4.482 4.8 3.3 5.530 5.4 2.0 32 0 2.825 4.5 2.3 3.265 5.1 1.4 50 10 1.830 4.2 1.2 1.990 4.8 0.8 68 20 1.216 4.0 0.3 1.249 4.5 0.3 77 25 1.000 3.9 0.0 1.000 4.4 0.0 86 30 0.8270 3.7 0.6 0.8056 4.3 0.3 104 40 0.5747 3.5 1.4 0.5325 4.0 0.7 122 50 0.4074 3.3 2.2 0.3601 3.8 1.2 140 60 0.2942 3.2 3.0 0.2487 3.6 1.6 158 70 0.2161 3.0 3.6 0.1752 3.4 2.0 176 80 0.1612 2.9 4.3 0.1256 3.2 2.3 185 85 0.1401 2.8 4.6 0.1071 3.2 2.5 194 90 0.1221 2.7 4.9 0.09162 3.1 2.7 212 100 0.09376 2.6 5.5 0.06787 2.9 3.0 230 110 0.07292 2.5 6.1 0.05102 2.8 3.3 248 120 0.05738 2.3 6.7 0.03887 2.7 3.6 257 125 0.05112 2.3 6.9 0.03409 2.6 3.8 266 130 0.02999 2.5 3.9 284 140 0.02342 2.4 4.1 302 150 0.01849 2.3 4.4 This R/T Conversion Table is provided for reference only. MS uses the Steinhart-Hart equation to calculate the nominal Rt/R25 value. 1°C tables are available upon request. • Rt/R25— The ratio of the thermistor resistance at any temperature divided by its resistance at 25°C. For example, if you select a 500Ω at 25°C thermistor in Material "K", you can calculate its nominal resistance at 100°C to be 500 x .09376 = 46.88Ω. • α — Negative temperature coefficient of resistance expressed in %/°C. This is the percentage change in thermistor resistance for a 1°C change in its body temperature. α is particularly useful in calculating the required resistance tolerance necessary to guarantee sensor accuracy. For example, a Material "Z" thermistor has an α of -3.80%/°C at 50°C. If you require a sensor that is accurate to within + 2.0°C at 50°C, the thermistor must have a resistance tolerance of (+ 2.0°C) x (3.80%/°C)= + 5.6%. Temperature Sensor Products precisionsensors.meas-spec.com • Curve Dev. — Applies to thermistors that are point matched at 25°C. The Curve Dev. (%) must be added to the thermistor tolerance at 25°C to calculate the total tolerance or maximum deviation at any temperature. Curve Dev. accounts for the curve variance that occurs within any given batch or lot of thermistors. For example, if you specify a Material "Z" device with a + 5% tolerance at 25°C, it will have a total tolerance at 80°C of (+ 5%) +(±2.3%)= ±7.3%. 1711 139th Lane NW Andover, MN 55304 Ph: +1 800.899.9783 12-04-14 57 www.meas-spec.com NTC Thermistors (˚F)