Model DT335-0700
Dual RTD/Resistance Input Transmitter w/USB
Acromag, Inc. Tel: 248-295-0880
- 25 -
http://www.acromag.com
- 25 -
https://www.acromag.com
RTD Resistance versus Temperature
Temperature in Ohms
TEMP °C
100Ω Platinum RTD
120Ω
Nickel RTD
(α = 0.006872)
10Ω
Copper RTD
(α = 0.
004274)
α = 0.00385
α = 0.00390
α = 0.003911
α = 0.00392
–
200
18.520
17.396
17.260
17.079
1.058
–
150
39.723
38.903
38.789
38.648
3.113
–
100
60.256
59.721
59.638
59.543
5.128
–
50
80.306
80.044
80.000
79.952
86.17
7.104
–
40
84.271
84.061
84.026
83.988
92.76
7.490
–
30
88.222
88.065
88.038
88.010
99.41
7.876
–
20
92.160
92.056
92.038
92.019
106.15
8.262
–
10
96.086
96.034
96.025
96.015
113.00
8.649
0
100.000
100.000
100.000
100.000
120.00
9.035
+ 10
103.903
103.954
103.963
103.973
127.17
9.421
+ 20
107.794
107.896
107.915
107.934
134.52
9.807
+ 30
111.673
111.827
111.855
111.883
142.06
10.194
+ 40
115.541
115.745
115.783
115.821
149.79
10.580
+ 50
119.397
119.652
119.700
119.747
157.74
10.966
+ 60
123.242
123.547
123.605
123.661
165.90
11.352
+ 70
127.075
127.429
127.498
127.563
174.25
11.738
+ 80
130.897
131.300
131.379
131.454
182.84
12.125
+ 90
134.707
135.160
135.249
135.333
191.64
12.511
+ 100
138.506
139.007
139.107
139.200
200.64
12.897
+ 150
157.325
158.066
158.222
158.360
248.95
14.828
+ 200
175.856
176.828
177.044
177.226
303.46
16.776
+ 250
194.098
195.294
195.574
195.799
366.53
18.725
+ 300
212.052
213.463
213.811
214.079
439.44
+ 350
229.716
231.336
231.756
232.065
+ 400
247.092
248.912
249.409
249.758
+ 450
264.179
266.192
266.769
267.157
+ 500
280.978
283.175
283.836
284.263
+ 550
297.487
299.862
300.611
301.075
+ 600
313.708
316.252
317.094
317.594
+ 650
329.640
332.346
333.284
333.820
+ 700
345.284
348.143
349.181
349.752
+ 750
360.638
363.644
364.787
365.391
+ 800
375.704
378.848
380.099
380.736
+ 850
390.481
393.756
395.119
395.788
NOTE:
200Ω, 500Ω, and 1000Ω Platinum RTD resistances can be calculated based on the table above. For 200Ω Platinum,
multiply the Pt100
resistances in the table by 2. For 500Ω Platinum, multiply the resistances in the table by 5. For 1000Ω
Platinum, multiply the resistances in the table by 10.
NOTE:
Alpha (α) is used to identify the RTD curve and its value is derived by dividing the sensor resistance at 100°C
(boiling point of water) minus the sensor resistance at 0°C (freezing point of water), by the sensor resistance at 0°C, then
by 100°C (α = [R100°C
-
R0°C] / R0°C/ 100°C). For Pt100Ω α=0.00385, this is 38.5Ω/100.0Ω/100°C, or 0.00385Ω/Ω/°C.