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工业常用测温元件之一:热电阻

热电阻:热电阻的测温原理是基于导体或半导体的电阻值随温度变化而变化这一特性来测量温度及与温度有关的参数。热电阻大都由纯金属材料制成,目前应用最多的是铂和铜,现在已开始采用镍、锰和铑等材料制造热电阻。热电阻通常需要把电阻信号通过引线传递到计算机控制装置或者其它二次仪表上。

测量信号:电阻值

常用热电阻型号:pt100(在所测量温度为0摄氏度时,电阻值为100欧姆)

CU50(在所测量温度为0摄氏度时,电阻值为50欧姆)

主要组成部件:见上图

温度测量范围:-200℃~+800℃

生活中常用的热电阻样式很多,我用过的最小的为端面热电阻,长约1厘米,直径约3毫米,最大的长1.2米,直径约1厘米,最长的长约5米,直径约4毫米。(这里的外形尺寸是保护套管的尺寸)

PT100分度表:

Pt100

热电阻分度表

温度℃ 电阻值(Ω)(JJG 229-87)R0=100.00Ω
0 1 2 3 4 5 6 7 8 9
-200 18.49 - - - - - - - - -
-190 22.8 22.37 21.94 21.51 21.08 20.65 20.22 19.79 19.36 18.93
-180 27.08 26.65 26.23 25.8 25.37 24.94 24.52 24.09 23.66 23.23
-170 31.32 30.9 30.47 30.05 29.63 29.2 28.78 28.35 27.93 27.5
-160 35.53 35.11 34.69 34.27 33.85 33.43 33.01 32.59 32.16 31.74
-150 39.71 39.3 38.88 38.46 38.04 37.63 37.21 36.79 36.37 35.95
-140 43.87 43.45 43.04 42.63 42.21 41.79 41.38 40.96 40.55 40.13
-130 48 47.59 47.18 46.76 46.35 45.94 45.52 45.11 44.7 44.28
-120 52.11 51.7 51.2 50.88 50.47 50.06 49.64 49.23 48.82 48.41
-110 56.19 55.78 55.38 54.97 54.56 54.15 53.74 53.33 52.92 52.52
-100 60.25 59.85 59.44 59.04 58.63 58.22 57.82 57.41 57 56.6
-90 64.3 63.9 63.49 63.09 62.68 62.28 61.87 61.47 61.06 60.66
-80 68.33 67.92 67.52 67.12 66.72 66.31 65.91 65.51 65.11 64.7
-70 72.33 71.93 71.53 71.13 70.73 70.33 69.93 69.53 69.13 68.73
-60 76.33 75.93 75.53 75.13 74.73 74.33 73.93 73.53 73.13 72.73
-50 80.31 79.91 79.51 79.11 78.72 78.32 77.92 77.52 77.13 76.73
-40 84.27 83.88 83.48 83.08 82.69 82.29 81.89 81.5 81.1 80.7
-30 88.22 87.83 87.43 87.04 86.64 86.25 85.85 85.46 85.06 84.67
-20 92.16 91.77 91.37 90.98 90.59 90.19 89.8 89.4 89.01 88.62
-10 96.09 95.69 95.3 94.91 94.52 94.12 93.75 93.34 92.95 92.55
0 100 99.61 99.22 98.83 98.44 98.04 97.65 97.26 96.87 96.48
温度℃ 0 1 2 3 4 5 6 7 8 9
0 100 100.39 100.78 101.17 101.56 101.95 102.34 102.73 103.12 103.51
10 103.9 104.29 104.68 105.07 105.46 105.85 106.24 106.63 107.02 107.4
20 107.79 108.18 108.57 108.96 109.35 109.73 110.12 110.51 110.9 111.28
30 111.67 112.06 112.45 112.83 113.22 113.61 113.99 114.38 114.77 115.15
40 115.54 115.93 116.31 116.7 117.08 117.47 117.85 118.24 118.62 119.01
50 119.4 119.78 120.16 120.55 120.93 121.32 121.7 122.09 122.47 122.86
60 123.24 123.62 124.01 124.39 124.77 125.16 125.54 125.92 126.31 126.69
70 127.07 127.45 127.84 128.22 128.6 128.98 129.37 129.75 130.13 130.51
80 130.89 131.27 131.66 132.04 132.42 132.8 133.18 133.56 133.94 134.32
90 134.7 135.08 135.46 135.84 136.22 136.6 136.98 137.36 137.74 138.12
100 138.5 138.88 139.26 139.64 140.02 140.39 140.77 141.15 141.53 141.91
110 142.29 142.66 143.04 143.42 143.8 144.17 144.55 144.93 145.31 145.68
120 146.06 146.44 146.81 147.19 147.57 147.94 148.32 148.7 149.07 149.45
130 149.82 150.2 150.57 150.95 151.33 151.7 152.08 152.45 152.83 153.2
140 153.58 153.95 154.32 154.7 155.07 155.45 155.82 156.19 156.57 156.94
150 157.31 157.69 158.06 158.43 158.81 159.18 159.55 159.93 160.3 160.67
160 161.04 161.42 161.79 162.16 162.53 162.9 163.27 163.65 164.02 164.39
170 164.76 165.13 165.5 165.87 166.14 166.61 166.98 167.35 167.72 168.09
180 168.46 168.83 169.2 169.57 169.94 170.31 170.68 171.05 171.42 171.79
190 172.16 172.53 172.9 173.26 173.63 174 174.37 174.74 175.1 175.47
温度℃ 0 1 2 3 4 5 6 7 8 9
200 175.84 176.21 176.57 176.94 177.31 177.68 178.04 178.41 178.78 179.14
210 179.51 179.88 180.24 180.61 180.97 181.34 181.71 182.07 182.44 182.8
220 183.17 183.53 183.9 184.26 184.63 184.99 185.36 185.72 186.09 186.45
230 186.82 187.18 187.54 187.91 188.27 188.63 189 189.36 189.72 190.09
240 190.45 190.81 191.18 191.54 191.9 192.26 192.63 192.99 193.35 193.71
250 194.07 194.44 194.8 195.16 195.52 195.88 196.24 196.6 196.96 197.33
260 197.69 198.05 198.41 198.77 199.13 199.49 199.85 200.21 200.57 200.93
270 201.29 201.65 202.01 202.36 202.72 203.08 203.44 203.8 204.16 204.52
280 204.88 205.23 205.59 205.95 206.31 206.67 207.02 207.38 207.74 208.1
190 208.45 208.81 209.17 209.52 209.88 210.24 210.59 210.95 211.31 211.66
300 212.02 212.37 212.73 213.09 213.44 213.8 214.15 214.51 214.86 215.22
310 215.57 215.93 216.28 216.64 216.99 217.35 217.7 218.05 218.41 218.76
320 219.12 219.47 219.82 220.18 220.53 220.88 221.24 221.59 221.94 222.29
330 222.65 223 223.35 223.7 224.06 224.41 224.76 225.11 225.46 225.81
340 226.17 226.52 226.87 227.22 227.57 227.92 228.27 228.62 228.97 229.32
350 229.67 230.02 230.37 230.72 231.07 231.42 231.77 232.12 232.47 232.82
360 233.17 233.52 233.87 234.22 234.56 234.91 235.26 235.61 235.96 236.31
370 236.65 237 237.35 237.7 238.04 238.39 238.74 239.09 239.43 239.78
380 240.13 240.47 240.82 241.17 241.51 241.86 242.2 242.55 242.9 243.24
390 243.59 243.93 244.28 244.62 244.97 245.31 245.66 246 246.35 246.69
温度℃ 0 1 2 3 4 5 6 7 8 9
400 247.04 247.38 247.73 248.07 248.41 248.76 249.1 249.45 249.79 250.13
410 250.48 250.82 251.16 251.5 251.85 252.19 252.53 252.88 253.22 253.56
420 253.9 254.24 254.59 254.93 255.27 255.61 255.95 256.29 256.64 256.98
430 257.32 257.66 258 258.34 258.68 259.02 259.36 259.7 260.04 260.38
440 260.72 261.06 261.4 261.74 262.08 262.42 262.76 263.1 263.43 263.77
450 264.11 264.45 264.79 265.13 265.47 265.8 266.14 266.48 266.82 267.15
460 267.49 267.83 268.17 268.5 268.84 269.18 269.51 269.85 270.19 270.52
470 270.86 271.2 271.53 271.87 272.2 272.54 272.88 273.21 273.55 273.88
480 274.22 274.55 274.89 275.22 275.56 275.89 276.23 276.56 276.89 277.23
490 277.56 277.9 278.23 278.56 278.9 279.23 279.56 279.9 280.23 280.56
500 280.9 281.23 281.56 281.89 282.23 282.56 282.89 283.22 283.55 283.89
510 284.22 284.55 284.88 285.21 285.54 285.87 286.21 286.54 286.87 287.2
520 287.53 287.86 288.19 288.52 288.85 289.18 289.51 289.84 290.17 290.5
530 290.83 291.16 291.49 291.81 292.14 292.47 292.8 293.13 293.46 293.79
540 294.11 294.44 294.77 295.1 295.43 295.75 296.08 296.41 296.74 297.06
550 297.39 297.72 298.04 298.37 298.7 299.02 299.35 299.68 300 300.33
560 300.65 300.98 301.31 301.63 301.96 302.28 302.61 302.93 303.26 303.58
570 303.91 304.23 304.56 304.88 305.2 305.53 305.85 306.18 306.5 306.82
580 307.15 307.47 307.79 308.12 308.44 308.76 309.09 309.41 309.73 310.05
590 310.38 310.7 311.02 311.34 311.67 311.99 312.31 312.63 312.95 313.27
温度℃ 0 1 2 3 4 5 6 7 8 9
600 313.59 313.92 314.24 314.56 314.88 315.2 315.52 315.84 316.16 316.48
610 316.8 317.12 317.44 317.76 318.08 318.4 318.72 319.04 319.36 319.68
620 319.99 320.31 320.63 320.95 321.27 321.59 321.91 322.22 322.54 322.86
630 323.18 323.49 323.81 324.13 324.45 324.76 325.08 325.4 325.72 326.03
640 326.35 326.66 326.98 327.3 327.61 327.93 328.25 328.56 328.88 329.19
650 329.51 329.82 330.14 330.45 330.77 331.08 331.4 331.71 332.03 332.34
660 332.66 332.97 333.28 333.6 333.91 334.23 334.54 334.85 335.17 335.48
670 335.79 336.11 336.42 336.73 337.04 337.36 337.67 337.98 338.29 338.61
680 338.92 339.23 339.54 339.85 340.16 340.48 340.79 341.1 341.41 341.72
690 342.03 342.34 342.65 342.96 343.27 343.58 343.89 344.2 344.51 344.82
700 345.13 345.44 345.75 346.06 346.37 346.68 346.99 347.3 347.6 347.91
710 348.22 348.53 348.84 349.15 349.45 349.76 350.07 350.38 350.69 350.99
720 351.3 351.61 351.91 352.22 352.53 352.83 353.14 353.45 353.75 354.06
730 354.37 354.67 354.98 355.28 355.59 355.9 356.2 356.51 356.81 357.12
740 357.42 357.73 358.03 358.34 358.64 358.95 359.25 359.55 359.86 360.16
750 360.47 360.77 361.07 361.38 361.68 361.98 362.29 362.59 362.89 363.19
760 363.5 368.8 364.1 364.4 364.71 365.01 365.31 365.61 365.91 366.22
770 366.52 366.82 367.12 367.42 367.72 368.02 368.32 368.63 368.93 369.23
780 369.53 369.83 370.13 370.43 370.73 371.03 371.33 371.63 371.93 372.22
790 372.52 372.82 373.12 373.42 373.72 374.02 374.32 374.61 374.91 375.21
800 375.51 375.81 376.1 376.4 376.7 377 377.2 377.59 377.89 378.19
810 378.48 378.78 379.08 379.37 379.67 379.97 380.26 380.56 380.85 381.15
820 381.45 381.74 382.04 382.33 382.63 382.92 383.22 383.51 383.81 384.1
830 384.4 384.69 384.98 385.28 385.57 385.87 386.16 386.45 386.75 387.04
840 387.34 387.63 387.92 388.21 388.51 388.8 389.09 389.39 389.68 389.97
850 390.26 - - - - - - - - -

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