Curve 40

Curve 40 1 °C Rt/R25 Ratio Table

Updated Nov 5, 2026

Download PDF R/T Specifications Calculator (XLSX)

North Star Sensors Curve 40

1 °C Ratio Table

To calculate the resistance value at a specific temperature point, multiply the corresponding Rt/R25 ratio by the resistance at 25 °C.

°C	Rt/R25
-50	44.167
-49	41.476
-48	38.965
-47	36.621
-46	34.432
-45	32.386
-44	30.474
-43	28.686
-42	27.014
-41	25.448
-40	23.983
-39	22.610
-38	21.324
-37	20.119
-36	18.989
-35	17.928
-34	16.933
-33	15.999
-32	15.122
-31	14.298
-30	13.523
-29	12.795
-28	12.110
-27	11.466
-26	10.860
-25	10.289
-24	9.7514
-23	9.2449
-22	8.7675
-21	8.3175
-20	7.8931
-19	7.4927
-18	7.1148
-17	6.7581
-16	6.4213
-15	6.1031
-14	5.8024
-13	5.5182
-12	5.2495
-11	4.9954
-10	4.7549

°C	Rt/R25
-10	4.7549
-9	4.5274
-8	4.3119
-7	4.1079
-6	3.9147
-5	3.7316
-4	3.5581
-3	3.3935
-2	3.2375
-1	3.0895
0	2.9490
1	2.8157
2	2.6891
3	2.5689
4	2.4547
5	2.3462
6	2.2431
7	2.1450
8	2.0518
9	1.9631
10	1.8787
11	1.7983
12	1.7219
13	1.6491
14	1.5797
15	1.5136
16	1.4507
17	1.3906
18	1.3334
19	1.2788
20	1.2268
21	1.1771
22	1.1297
23	1.0845
24	1.0413
25	1.0000
26	0.96059
27	0.92293
28	0.88693
29	0.85253
30	0.81964

°C	Rt/R25
30	0.81964
31	0.78818
32	0.75809
33	0.72929
34	0.70174
35	0.67537
36	0.65012
37	0.62594
38	0.60279
39	0.58060
40	0.55935
41	0.53897
42	0.51944
43	0.50072
44	0.48276
45	0.46554
46	0.44901
47	0.43315
48	0.41794
49	0.40333
50	0.38930
51	0.37583
52	0.36290
53	0.35047
54	0.33853
55	0.32705
56	0.31602
57	0.30542
58	0.29522
59	0.28541
60	0.27597
61	0.26690
62	0.25816
63	0.24975
64	0.24166
65	0.23387
66	0.22636
67	0.21913
68	0.21217
69	0.20546
70	0.19900

°C	Rt/R25
70	0.19900
71	0.19277
72	0.18676
73	0.18097
74	0.17539
75	0.17000
76	0.16481
77	0.15979
78	0.15496
79	0.15029
80	0.14579
81	0.14144
82	0.13724
83	0.13318
84	0.12927
85	0.12548
86	0.12183
87	0.11830
88	0.11488
89	0.11159
90	0.10840
91	0.10531
92	0.10233
93	0.099448
94	0.096659
95	0.093961
96	0.091350
97	0.088823
98	0.086378
99	0.084011
100	0.081720
101	0.079501
102	0.077352
103	0.075270
104	0.073254
105	0.071302
106	0.069409
107	0.067576
108	0.065799
109	0.064077
110	0.062407

°C	Rt/R25
110	0.062407
111	0.060789
112	0.059219
113	0.057697
114	0.056221
115	0.054789
116	0.053400
117	0.052052
118	0.050744
119	0.049475
120	0.048243
121	0.047047
122	0.045886
123	0.044758
124	0.043663
125	0.042600
126	0.041567
127	0.040564
128	0.039589
129	0.038642
130	0.037721
131	0.036827
132	0.035957
133	0.035112
134	0.034290
135	0.033491
136	0.032714
137	0.031958
138	0.031223
139	0.030508
140	0.029812
141	0.029135
142	0.028477
143	0.027836
144	0.027212
145	0.026605
146	0.026013
147	0.025438
148	0.024877
149	0.024332
150	0.023800