Coated Chip Style Features: Very fast response time -50C to 150C operation Epoxy or phenolic resin coatings Values from 100 to 1 Meg Bare or insulated lead wires Time Constant: 10 sec. (max.) Dissipation Factor: 1 mW/C (nom.) Coated Chip Style MS Standard Values STANDARDS R () Part Number Material* TYPES OF THERMISTOR TOLERANCES 25 Code Tolerance 100 A1002 K Point Matched: -1 + 1% Thermistor resistance value is specified at -2 + 2% 500 A5002 K one temperature (25C standard). Tolerance -5 + 5% 1,000 A1003 K is given as + % of nominal resistance. -10 + 10% 1,000 A1003 Z 3,000 A3003 Z Curve Matched:** Code Accuracy 5,000 A5003 Z 10,000 A1004 Z Thermistor accuracy guaranteed over -A3 + 1.0C 10,000 A1004 C a temperature range (0C to 70C standard). 20,000 A2004 C Often called interchangeable thermistors, -B3 + 0.5C these sensors allow direct replacement 30,000 A3004 D without the need for recalibration. -C3 + 0.2C 50,000 A5004 D 100k A1005 D Other temperature ranges available. 250k A2505 H Maximum operating temperature for curve 500k A5005 H matched thermistors is 105C. 1 Meg A1006 H **Contact factory to determine which parts are offered with curve matching. * See R/T Tables on page 59. Basic P/N Material Tol. Code Point-match Temperature (C) (only used if other than 25C) Examples: A1003K-2 ................... Curve Material, 1000 + 2% at 25C A1004Z-C3 ................ Curve Material, 10k at 25C with + 0.2C accuracy from 0C to 70C A5005H-5-150 ........... Curve Material, 500k at 25C with tolerance rating of + 5% at 150C 58 Temperature Sensor Products 1711 139th Lane NW Andover, MN 55304 12-04-14 precisionsensors.meas-spec.com Ph: +1 800.899.9783 www.meas-spec.comMS Resistance vs. Temperature Conversion Table Coated Chip NTC Thermistor Material K C Z D H Temp. Coef. -3.9%/C -4.0%/C -4.4%/C -4.7%/C -5.3%/C 25C ( ) 25 Resistance Ratio 6.93 7.58 9.07 10.45 14.09 R /R 0 50 Beta ( ) 3498 3694 3976 4262 4851 25/85 Temperature R Curve R Curve R Curve R Curve R Curve t t t t t (F) (C) R (%/C) Dev. R (%/C) Dev. R (%/C) Dev. R (%/C) Dev. R (%/C) Dev. 25 25 25 25 25 -58 -50 39.46 6.2 8.2 44.20 6.3 4.3 66.75 7.1 5.5 83.47 7.4 7.0 110.1 7.4 17.4 -40 -40 21.68 5.8 6.8 23.99 5.9 3.6 33.56 6.6 4.3 40.70 6.9 5.1 55.50 7.2 15.6 -22 -30 12.38 5.4 5.6 13.53 5.6 2.9 17.67 6.2 3.5 20.78 6.5 4.1 28.40 7.0 14.6 -4 -20 7.329 5.1 4.4 7.894 5.2 2.3 9.697 5.8 2.7 11.07 6.1 3.2 14.65 6.8 13.7 14 -10 4.482 4.8 3.3 4.755 4.9 1.7 5.530 5.4 2.0 6.124 5.7 2.4 7.609 6.4 11.7 32 0 2.825 4.5 2.3 2.949 4.6 1.2 3.265 5.1 1.4 3.510 5.4 1.6 4.094 6.0 9.9 50 10 1.830 4.2 1.2 1.879 4.4 0.7 1.990 4.8 0.8 2.078 5.1 1.0 2.277 5.7 8.2 68 20 1.216 4.0 0.3 1.227 4.1 0.2 1.249 4.5 0.3 1.267 4.8 0.3 1.306 5.4 6.6 77 25 1.000 3.9 0.0 1.000 4.0 0.0 1.000 4.4 0.0 1.000 4.7 0.0 1.000 5.3 5.9 86 30 0.8270 3.7 0.6 0.8196 3.9 0.2 0.8056 4.3 0.3 0.7943 4.5 0.3 0.7709 5.1 5.2 104 40 0.5747 3.5 1.4 0.5594 3.7 0.6 0.5325 4.0 0.7 0.5106 4.3 0.9 0.4674 4.9 3.7 122 50 0.4074 3.3 2.2 0.3893 3.5 1.0 0.3601 3.8 1.2 0.3360 4.1 1.4 0.2905 4.6 2.4 140 60 0.2942 3.2 3.0 0.2760 3.4 1.3 0.2487 3.6 1.6 0.2259 3.9 1.9 0.1848 4.4 1.1 158 70 0.2161 3.0 3.6 0.1990 3.2 1.7 0.1752 3.4 2.0 0.1550 3.7 2.3 0.1202 4.2 0.0 176 80 0.1612 2.9 4.3 0.1458 3.0 2.0 0.1256 3.2 2.3 0.1084 3.5 2.7 0.07980 4.0 1.0 185 85 0.1401 2.8 4.6 0.1255 3.0 2.2 0.1071 3.2 2.5 0.09121 3.4 2.9 0.06550 3.9 1.5 194 90 0.1221 2.7 4.9 0.1084 2.9 2.3 0.09162 3.1 2.7 0.07710 3.3 3.1 0.05400 3.8 2.1 212 100 0.09375 2.6 5.5 0.08169 2.8 2.5 0.06787 2.9 3.0 0.05574 3.2 3.5 0.03720 3.6 3.1 230 110 0.07292 2.5 6.1 0.06238 2.6 2.8 0.05102 2.8 3.3 0.04092 3.0 3.9 0.02618 3.5 4.0 248 120 0.05738 2.3 6.7 0.04822 2.5 3.0 0.03887 2.7 3.6 0.03047 2.9 4.2 0.01860 3.3 4.9 257 125 0.05112 2.3 6.9 0.04258 2.5 3.1 0.03409 2.6 3.8 0.02642 2.8 4.5 0.01580 3.2 5.3 266 130 0.03770 2.4 3.3 0.02999 2.5 3.9 0.02299 2.8 4.8 0.01340 3.2 5.8 284 140 0.02979 2.3 3.5 0.02342 2.4 4.1 0.01756 2.6 5.4 0.00980 3.1 6.6 302 150 0.02377 2.2 3.7 0.01849 2.3 4.4 0.01357 2.5 6.1 0.00730 2.9 7.3 This R/T Conversion Table is provided for reference only. MS uses the Steinhart-Hart equation to calculate the nominal Rt/R value. 1C tables are available upon request. 25 Rt/R - The ratio of the thermistor resistance at any temperature accurate to within + 2.0C at 50C, the thermistor must have a 25 divided by its resistance at 25C. For example, if you select a resistance tolerance of + 2.0C x 3.5%/C= + 7.0%. 10k at 25C thermistor in Material, you can calculate its nominal resistance at 100C to be 10,000 x .06787 = 678.7. Curve Dev. Applies to thermistors that are point matched at 25C. The Curve Dev. (%) must be added to the thermistor tolerance at 25C to calculate the total tolerance or maximum - Negative Temperature Coefficient of Resistance expressed in deviation at any temperature. Curve Dev. accounts for the %/C. This is the percentage change in thermistor resistance for curve variance that occurs within any given batch or lot of a 1C change in its body temperature. is particularly useful in thermistors. For example, if you specify a Material device calculating the required resistance tolerance necessary to guar- with a + 5% tolerance at 25C, it will have a total tolerance at antee sensor accuracy. For example, a Material thermistor 80C of (+ 5%) +(2.3%)= 7.3%. has an of -3.5%/C at 50C. If you require a sensor that is 59 Temperature Sensor Products 1711 139th Lane NW Andover, MN 55304 12-04-14 precisionsensors.meas-spec.com Ph: +1 800.899.9783 www.meas-spec.com Std. Probes NTC Thermistors & Assemblies