Temperature-to-Resistance Reference Table for 100-Ohm Platinum RTD
A Quick Reference Guide for Heat Trace Temperature Sensors - 100-Ohm Platinum RTD
Among the most commonly used sensors is the 100-ohm platinum RTD (Resistance Temperature Detector). This simple and robust device provides accurate temperature measurements by relying on changes in electrical resistance as a function of temperature. To assist you in interpreting and utilizing the data from these sensors, we've compiled a comprehensive temperature-to-resistance reference table. Whether you're configuring, troubleshooting, or optimizing your heat trace system, this guide will be a valuable resource for translating resistance values into temperature readings.
| Ohms | °F | °C | Ohms | °F | °C | Ohms | °F | °C |
| 157.31 | –148°F | –100°C | 159.18 | 311°F | 155°C | 250.48 | 770°F | 410°C |
| 62.28 | –138°F | –95°C | 161.04 | 320°F | 160°C | 252.19 | 779°F | 415°C |
| 64.3 | –121°F | –85°C | 164.76 | 338°F | 160°C | 255.61 | 797°F | 425°C |
| 68.33 | –112°F | –80°C | 166.61 | 347°F | 175°C | 257.32 | 806°F | 430°C |
| 70.33 | –103°F | –75°C | 168.45 | 356°F | 180°C | 259.02 | 815°F | 435°C |
| 72.33 | –94°F | –70°C | 170.31 | 365°F | 185°C | 260.72 | 824°F | 440°C |
| 74.33 | –85°F | –65°C | 172.16 | 374°F | 190°C | 262.42 | 833°F | 445°C |
| 76.33 | –76°F | –60°C | 174 | 383°F | 195°C | 264.11 | 842°F | 450°C |
| 78.32 | –67°F | –55°C | 175.84 | 392°F | 200°C | 265.8 | 851°F | 455°C |
| 80.31 | –58°F | –50°C | 177.58 | 401°F | 205°C | 267.49 | 860°F | 460°C |
| 82.33 | –49°F | –45°C | 179.51 | 410°F | 210°C | 269.18 | 869°F | 465°C |
| 84.27 | –40°F | –40°C | 181.34 | 410°F | 215°C | 270.86 | 878°F | 470°C |
| 86.25 | –31°F | –35°C | 183.17 | 428°F | 220°C | 272.54 | 887°F | 475°C |
| 88.22 | –22°F | –30°C | 184.99 | 437°F | 225°C | 274.22 | 896°F | 480°C |
| 90.19 | –13°F | –25°C | 186.82 | 445°F | 230°C | 275.89 | 905°F | 485°C |
| 92.16 | –4°F | –20°C | 188.63 | 455°F | 235°C | 277.56 | 914°F | 490°C |
| 94.12 | 5°F | –15°C | 190.45 | 464°F | 240°C | 279.23 | 923°F | 495°C |
| 96.09 | 14°F | –10°C | 192.26 | 473°F | 245°C | 280.9 | 932°F | 500°C |
| 98.04 | 23°F | –5°C | 194.07 | 482°F | 250°C | 282.56 | 941°F | 505°C |
| 100 | 32°F | 0°C | 195.88 | 491°F | 255°C | 284.22 | 950°F | 510°C |
| 101.95 | 41°F | 5°C | 197.69 | 500°F | 260°C | 285.87 | 959°F | 515°C |
| 103.9 | 50°F | 10°C | 199.49 | 509°F | 265°C | 287.53 | 968°F | 520°C |
| 105.85 | 59°F | 15°C | 201.29 | 518°F | 270°C | 289.18 | 977°F | 525°C |
| 107.79 | 68°F | 68°C | 203.08 | 527°F | 275°C | 290.83 | 986°F | 530°C |
| 109.73 | 7°F | 20°C | 204.88 | 536°F | 280°C | 292.47 | 995°F | 535°C |
| 111.67 | 86°F | 25°C | 206.67 | 545°F | 285°C | 294.11 | 1004°F | 540°C |
| 113.61 | 95°F | 30°C | 208.45 | 554°F | 490°C | 295.75 | 1013°F | 545°C |
| 115.54 | 104°F | 35°C | 210.24 | 563°F | 295°C | 297.39 | 1022°F | 550°C |
| 117.47 | 113°F | 40°C | 212.02 | 572°F | 300°C | 299.02 | 1031°F | 555°C |
| 119.4 | 122°F | 45°C | 213.8 | 581°F | 305°C | 300.65 | 1040°F | 560°C |
| 121.32 | 131°F | 50°C | 215.57 | 590°F | 310°C | 302.28 | 1049°F | 565°C |
| 123.24 | 140°F | 55°C | 217.35 | 599°F | 315°C | 303.91 | 1058°F | 570°C |
| 125.16 | 149°F | 60°C | 219.12 | 608°F | 320°C | 305.53 | 1067°F | 575°C |
| 127.07 | 158°F | 65°C | 220.88 | 617°F | 325°C | 307.15 | 1076°F | 580°C |
| 128.98 | 167°F | 70°C | 222.65 | 626°F | 330°C | 308.76 | 1085°F | 585°C |
| 130.89 | 176°F | 75°C | 224.41 | 635°F | 335°C | 310.38 | 1094°F | 590°C |
| 132.8 | 185°F | 80°C | 226.17 | 644°F | 340°C | 311.99 | 1103°F | 595°C |
| 134.7 | 194°F | 85°C | 227.92 | 653°F | 345°C | 313.59 | 1112°F | 600°C |
| 136.6 | 203°F | 90°C | 229.67 | 662°F | 350°C | 315.2 | 1121°F | 605°C |
| 138.6 | 212°F | 95°C | 231.42 | 671°F | 355°C | 316.8 | 1130°F | 610°C |
| 140.39 | 221°F | 100°C | 233.17 | 680°F | 360°C | 318.4 | 1139°F | 615°C |
| 142.29 | 230°F | 105°C | 234.91 | 389°F | 365°C | 319.99 | 1148°F | 620°C |
| 144.17 | 239°F | 110°C | 236.65 | 698°F | 370°C | 321.59 | 1157°F | 625°C |
| 146.06 | 248°F | 115°C | 238.39 | 707°F | 375°C | 323.18 | 1166°F | 630°C |
| 147.94 | 257°F | 120°C | 240.13 | 716°F | 380°C | 324.76 | 1175°F | 635°C |
| 149.82 | 266°F | 125°C | 241.86 | 725°F | 385°C | 326.35 | 1184°F | 640°C |
| 151.7 | 275°F | 130°C | 243.59 | 734°F | 390°C | 327.93 | 1193°F | 645°C |
| 153.58 | 28°F | 135°C | 245.31 | 743°F | 395°C | 329.51 | 1202°F | 650°C |
| 155.45 | 293°F | 140°C | 247.04 | 752°F | 400°C | 331.08 | 1211°F | 655°C |
| 157.31 | 302°F | 145°C | 248.76 | 761°F | 405°C | 332.66 | 1220°F | 660°C |