Glass Encapsulated Style Features • • • • • • • Low Cost, High Reliability High Temperature Operation (up to 300°C) Glass to Metal Hermetic Seal Values from 2kΩ to 1 MegΩ Tin or Unplated Dumet Leads (solderable and weldable) Time Constant: 8 sec. (nom.) Dissipation Factor: 2mW/˚C (nom.) Glass Encapsulated Style MS Standard Values R25 (Ω) Part Number 2,000 3,000 5,000 5,000 10,000 20,000 30,000 50,000 100k 200k 1 Meg E2003 E3003 E5003 E5003 E1004 E2004 E3004 E5004 E1005 E2005 E1006 * See R/T Tables on page 61. Material* Q U U A A A A A M R V STANDARDS TYPES OF THERMISTOR TOLERANCES CodeTolerance Point Matched:-1 + 1% Thermistor resistance value is specified at -2 + 2% one temperature (25°C standard). Tolerance -5 + 5% is given as + % of nominal resistance.-10 + 10% Curve Matched:** CodeAccuracy Thermistor accuracy guaranteed over -A3 a temperature range (0°C to 70°C standard). Often called interchangeable thermistors, -B3 these sensors allow direct replacement without the need for recalibration. + 1.0°C + 0.5°C **Contact factory to determine which parts are offered with curve matching. Thermistors listed on this sheet are primarily intended for use in probes & assemblies manufactured by MS. S1 Basic P/N Material Tol. Code Point-match Temperature (°C) For unplated leads only (only used if other than 25°C) Examples: E5003A-2...................... Curve "A" Material, 5kΩ + 2% at 25°C E1004A-B3................... Curve "A" Material, 10kΩ at 25°C with + 0.5°C accuracy from 0°C to 70°C E2005R-5-200.............. Curve "R" Material, 200kΩ at 25°C with tolerance rating of + 5% at 200°C 60 Temperature Sensor Products precisionsensors.meas-spec.com 1711 139th Lane NW Andover, MN 55304 Ph: +1 800.899.9783 12-04-14 www.meas-spec.com Material Q U A M R V Beta (b25/85) 3528 3480 3992 4008 4240 4557 Temp. Coef. @25˚C (a25) -3.94 -3.82 -4.42 -4.45 -4.64 -4.99 Resistance Ratio 7.09 6.81 9.22 9.11 10.30 12.34 Temperature (˚C) RT/R25 RT/R25 RT/R25 RT/R25 RT/R25 RT/R25 -50 40.73 38.00 71.08 66.86 83.31 120.70 -40 22.31 20.96 35.11 33.54 40.38 54.79 -30 12.70 12.04 18.25 17.64 20.57 26.30 -20 7.485 7.167 9.922 9.689 10.95 13.27 -10 4.558 4.410 5.620 5.528 6.065 7.000 0 2.859 2.794 3.302 3.266 3.485 3.844 10 1.843 1.819 2.002 1.992 2.069 2.189 20 1.219 1.214 1.251 1.250 1.266 1.289 25 1.000 1.000 1.000 1.000 1.000 1.000 30 0.8250 0.8283 0.8045 0.0852 0.7955 0.7816 40 0.5710 0.5773 0.5306 0.5314 0.5100 0.4873 50 0.4035 0.4103 0.3583 0.3585 0.3350 0.3116 60 0.2905 0.2967 0.2472 0.2469 0.2280 0.2039 70 0.2129 0.2182 0.1739 0.1732 0.1567 0.1363 80 0.1587 0.1629 0.1246 0.1237 0.1097 0.0929 85 0.1378 0.1415 0.1061 0.1052 0.0920 0.0773 90 0.1201 0.1234 0.0908 0.0898 0.0751 0.0645 100 0.0922 0.0947 0.0672 0.0661 0.0565 0.0456 110 0.0718 0.0735 0.0504 0.0494 0.0414 0.0327 120 0.0567 0.0578 0.0384 0.0374 0.0308 0.0238 125 0.0506 0.0515 0.0337 0.0327 0.0267 0.0204 130 0.0453 0.0459 0.0296 0.0287 0.0232 0.0176 140 0.0366 0.0369 0.0231 0.0222 0.0177 0.0131 150 0.0299 0.0299 0.0182 0.0174 0.0137 0.0099 160 0.0246 0.0244 0.0145 0.0138 0.0106 0.0076 170 0.0205 0.0202 0.0116 0.0110 0.0084 0.0059 180 0.0173 0.0168 0.0094 0.0089 0.0067 0.0046 190 0.0146 0.0140 0.0077 0.0072 0.0053 0.0036 200 0.0125 0.0118 0.0064 0.0059 0.0040 0.0029 225 0.0088 0.0080 0.0041 0.0037 0.0026 0.0017 250 0.0064 0.0056 0.0027 0.0024 0.0017 0.0010 275 0.0049 0.0040 0.0019 0.0017 0.0011 0.0007 300 0.0038 0.0030 0.0013 0.0012 0.0008 0.0004 R0/R50 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 10kΩ at 25°C thermistor in Material "A", you can calculate its' nominal resistance at 100°C to be 10,000 x .0672 = 672Ω. • α25 - Negative Temperature Coefficient of Resistance at 25˚C Temperature Sensor Products precisionsensors.meas-spec.com expressed in %/˚C. This is the percentage change in thermistor resistance for a 1°C change in its' body temperature at 25˚C. α is particularly useful in calculating the required resistance tolerance necessary to guarantee sensor accuracy. α at temperatures other than 25˚C is available upon request as tables in 1˚C increments. 1711 139th Lane NW Andover, MN 55304 Ph: +1 800.899.9783 12-04-14 61 www.meas-spec.com NTC Thermistors MS Resistance vs. Temperature Conversion Table Glass Encapsulated Thermistor