PT1000 RTD Resistance Table: Complete Chart (-200°C to 850°C) per IEC 60751-focusensing.com

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PT1000 RTD Resistance Table: Complete Chart (-200°C to 850°C) per IEC 60751

August 08 , 2026

Direct Answer

A PT1000 RTD measures exactly 1000.00 Ω at 0°C and 1385.05 Ω at 100°C under the IEC 60751 standard curve (α = 0.003855 °C⁻¹). Near 0°C, the temperature sensitivity is 3.85 Ω/°C—exactly ten times that of a standard PT100. This 10× resistance multiplier reduces lead-wire resistance error by ~90% in two-wire installations, making PT1000 the industrial standard for long-cable HVAC and remote sensing setups.

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1. PT1000 Fundamentals: 0°C = 1000.00 Ω, Sensitivity = 3.85 Ω/°C

A PT1000 is a Resistance Temperature Detector (RTD) fabricated from high-purity platinum exhibiting a nominal resistance ($R_0$) of 1000.00 Ω at 0°C. It follows the exact same normalized temperature-resistance relationship as the classic PT100 element, scaled up by a factor of 10.

Reference Temperature Point	PT1000 Resistance (Ω)	PT100 Resistance (Ω)	Sensitivity ΔR/ΔT
-200°C (Cryogenic Limit)	185.20 Ω	18.52 Ω	~4.31 Ω/°C
0°C (Ice Point Reference)	1000.00 Ω	100.00 Ω	3.85 Ω/°C
100°C (Steam Point)	1385.05 Ω	138.51 Ω	3.75 Ω/°C
850°C (IEC Upper Limit)	3904.81 Ω	390.48 Ω	~2.47 Ω/°C

2. Complete PT1000 Resistance Table (-200°C to 849°C)

Values calculated according to IEC 60751 / DIN EN 60751 (α = 0.003855 °C⁻¹). To read: row represents tens digit, column represents ones digit (e.g., Row "120", Column "6" = 126°C = 1483.28 Ω).

Negative Range: -200°C to -1°C

°C	0	1	2	3	4	5	6	7	8	9
-200	185.20	189.52	193.84	198.15	202.47	206.77	211.08	215.38	219.67	223.97
-190	228.25	232.54	236.82	241.10	245.38	249.65	253.92	258.19	262.45	266.71
-180	270.96	275.22	279.47	283.71	287.96	292.20	296.43	300.67	304.90	309.13
-170	313.35	317.57	321.79	326.01	330.22	334.43	338.64	342.84	347.04	351.24
-160	355.43	359.63	363.82	368.00	372.19	376.37	380.55	384.72	388.89	393.06
-150	397.23	401.40	405.56	409.72	413.88	418.03	422.18	426.33	430.48	434.62
-140	438.76	442.90	447.04	451.17	455.31	459.44	463.56	467.69	471.81	475.93
-130	480.05	484.16	488.28	492.39	496.49	500.60	504.70	508.81	512.91	517.00
-120	521.10	525.19	529.28	533.37	537.46	541.54	545.62	549.70	553.78	557.86
-110	561.93	566.00	570.07	574.14	578.21	582.27	586.33	590.39	594.45	598.50
-100	602.56	606.61	610.66	614.71	618.76	622.80	626.84	630.88	634.92	638.96
-90	643.00	647.03	651.06	655.09	659.12	663.15	667.17	671.20	675.22	679.24
-80	683.25	687.27	691.29	695.30	699.31	703.32	707.33	711.34	715.34	719.34
-70	723.35	727.35	731.34	735.34	739.34	743.33	747.32	751.31	755.30	759.29
-60	763.28	767.26	771.25	775.23	779.21	783.19	787.17	791.14	795.12	799.09
-50	803.06	807.03	811.00	814.97	818.94	822.90	826.87	830.83	834.79	838.75
-40	842.71	846.66	850.62	854.57	858.53	862.48	866.43	870.38	874.32	878.27
-30	882.22	886.16	890.10	894.04	897.98	901.92	905.86	909.80	913.73	917.67
-20	921.60	925.53	929.46	933.39	937.32	941.24	945.17	949.09	953.02	956.94
-10	960.86	964.78	968.70	972.61	976.53	980.44	984.35	988.26	992.17	996.08

Positive Range: 0°C to 299°C (Core Industrial Operational Range)

°C	0	1	2	3	4	5	6	7	8	9
0	1000.00	1003.91	1007.81	1011.72	1015.62	1019.53	1023.43	1027.33	1031.23	1035.13
10	1039.03	1042.92	1046.82	1050.71	1054.60	1058.49	1062.38	1066.27	1070.16	1074.05
20	1077.93	1081.82	1085.70	1089.59	1093.47	1097.35	1101.23	1105.10	1108.98	1112.86
30	1116.73	1120.60	1124.47	1128.35	1132.21	1136.08	1139.95	1143.82	1147.68	1151.55
40	1155.41	1159.27	1163.13	1166.99	1170.85	1174.70	1178.56	1182.41	1186.27	1190.12
50	1193.97	1197.82	1201.67	1205.52	1209.36	1213.21	1217.05	1220.90	1224.74	1228.58
60	1232.42	1236.26	1240.09	1243.93	1247.77	1251.60	1255.43	1259.26	1263.09	1266.92
70	1270.75	1274.58	1278.40	1282.23	1286.05	1289.87	1293.70	1297.52	1301.33	1305.15
80	1308.97	1312.78	1316.60	1320.41	1324.22	1328.03	1331.84	1335.65	1339.46	1343.26
90	1347.07	1350.87	1354.68	1358.48	1362.28	1366.08	1369.87	1373.67	1377.47	1381.26
100	1385.05	1388.85	1392.64	1396.43	1400.22	1404.00	1407.79	1411.58	1415.36	1419.14
110	1422.93	1426.71	1430.49	1434.26	1438.04	1441.82	1445.59	1449.37	1453.14	1456.91
120	1460.68	1464.45	1468.22	1471.98	1475.75	1479.51	1483.28	1487.04	1490.80	1494.56
130	1498.32	1502.08	1505.83	1509.59	1513.34	1517.10	1520.85	1524.60	1528.35	1532.10
140	1535.84	1539.59	1543.33	1547.08	1550.82	1554.56	1558.30	1562.04	1565.78	1569.52
150	1573.25	1576.99	1580.72	1584.45	1588.18	1591.91	1595.64	1599.37	1603.09	1606.82
200	1758.56	1762.24	1765.91	1769.59	1773.26	1776.93	1780.60	1784.27	1787.94	1791.61
250	1940.98	1944.60	1948.22	1951.83	1955.45	1959.06	1962.68	1966.29	1969.90	1973.51

Note: Full data up to 850°C (3904.81 Ω) is included in the CSV file download below.

4. Callendar-Van Dusen Equation & Curve Variations

The standard resistance-temperature curve of platinum RTDs is mathematically specified by the Callendar-Van Dusen (CVD) equation:

For $t \ge 0^\circ\text{C}$: $$R(t) = R_0 \cdot \left(1 + A \cdot t + B \cdot t^2\right)$$

For $t < 0^\circ\text{C}$: $$R(t) = R_0 \cdot \left[1 + A \cdot t + B \cdot t^2 + C \cdot (t - 100) \cdot t^3\right]$$

Coefficient Value (IEC 60751) Engineering Unit

$R_0$ 1000.00 Ω

$A$ $3.9083 \times 10^{-3}$ °C⁻¹

$B$ $-5.775 \times 10^{-7}$ °C⁻²

$C$ $-4.183 \times 10^{-12}$ °C⁻⁴

European IEC 60751 ($\alpha = 0.00385$) vs. Legacy American/JIS Curves ($\alpha = 0.00391$)

Always verify the temperature coefficient ($\alpha = \frac{R_{100} - R_0}{100 \cdot R_0}$) specified by your transmitter firmware or system lookup tables. Mismatching a 0.00385 table with a legacy 0.00391 sensor introduces a severe non-linear measurement offset exceeding 1.8°C at 300°C.

Coefficient	Value (IEC 60751)	Engineering Unit
$R_0$	1000.00	Ω
$A$	$3.9083 \times 10^{-3}$	°C⁻¹
$B$	$-5.775 \times 10^{-7}$	°C⁻²
$C$	$-4.183 \times 10^{-12}$	°C⁻⁴

5. IEC 60751 Accuracy Tolerance Classes (Class AA to Class C)

The standard defines four tolerance classes based on maximum allowed temperature deviation $\Delta t$ (°C):

Class Tolerance Formula ($\pm^\circ\text{C}$) Validity Range Error @ 0°C Error @ 100°C

Class AA (F0.1) $0.10 + 0.0017 \cdot |t|$ -50°C to 250°C $\pm 0.10^\circ\text{C}$ ($\pm 0.39\ \Omega$) $\pm 0.27^\circ\text{C}$ ($\pm 1.02\ \Omega$)

Class A (F0.15) $0.15 + 0.0020 \cdot |t|$ -100°C to 450°C $\pm 0.15^\circ\text{C}$ ($\pm 0.59\ \Omega$) $\pm 0.35^\circ\text{C}$ ($\pm 1.33\ \Omega$)

Class B (F0.3) $0.30 + 0.0050 \cdot |t|$ -196°C to 600°C $\pm 0.30^\circ\text{C}$ ($\pm 1.17\ \Omega$) $\pm 0.80^\circ\text{C}$ ($\pm 3.03\ \Omega$)

Class C (F0.6) $0.60 + 0.0100 \cdot |t|$ -196°C to 600°C $\pm 0.60^\circ\text{C}$ ($\pm 2.34\ \Omega$) $\pm 1.60^\circ\text{C}$ ($\pm 6.07\ \Omega$)

Focusens Engineering Lab Note: Long-Term Drift Disclosure

Tolerance classes strictly govern zero-hour factory calibration. In continuous thermal cycling tests ($1000\text{ hours}$ at $400^\circ\text{C}$), high-quality thin-film PT1000 sensors exhibit an additional thermal drift of $<0.04^\circ\text{C}/\text{year}$. In applications requiring high precision over 10+ years, recalibration intervals must account for long-term drift independent of initial tolerance class.

Class	Tolerance Formula ($\pm^\circ\text{C}$)	Validity Range	Error @ 0°C	Error @ 100°C
Class AA (F0.1)	$0.10 + 0.0017 \cdot \|t\|$	-50°C to 250°C	$\pm 0.10^\circ\text{C}$ ($\pm 0.39\ \Omega$)	$\pm 0.27^\circ\text{C}$ ($\pm 1.02\ \Omega$)
Class A (F0.15)	$0.15 + 0.0020 \cdot \|t\|$	-100°C to 450°C	$\pm 0.15^\circ\text{C}$ ($\pm 0.59\ \Omega$)	$\pm 0.35^\circ\text{C}$ ($\pm 1.33\ \Omega$)
Class B (F0.3)	$0.30 + 0.0050 \cdot \|t\|$	-196°C to 600°C	$\pm 0.30^\circ\text{C}$ ($\pm 1.17\ \Omega$)	$\pm 0.80^\circ\text{C}$ ($\pm 3.03\ \Omega$)
Class C (F0.6)	$0.60 + 0.0100 \cdot \|t\|$	-196°C to 600°C	$\pm 0.60^\circ\text{C}$ ($\pm 2.34\ \Omega$)	$\pm 1.60^\circ\text{C}$ ($\pm 6.07\ \Omega$)

6. Lead Wire Resistance Error Math: 2-Wire vs. 3-Wire vs. 4-Wire

In a 2-wire circuit, the transmitter measures the sum of element resistance ($R_{\text{RTD}}$) plus double the lead resistance ($2 \cdot R_{\text{lead}}$). Because copper cable exhibits a positive temperature coefficient (~0.39%/°C), lead resistance introduces a direct temperature error offset:

Temperature Error (°C) = (2 * R_lead) / Sensitivity (Ω/°C)

Sensor Type Sensitivity @ 0°C 30m 24AWG Copper Lead ($2 \cdot R_{\text{lead}} \approx 5.04\ \Omega$) Resulting Lead Error

PT1000 RTD 3.85 Ω/°C 5.04 Ω added ~1.31°C Error

PT100 RTD 0.385 Ω/°C 5.04 Ω added ~13.09°C Error

For more details on lead resistance compensation networks, refer to our comprehensive guide: Understanding 2-Wire vs 3-Wire vs 4-Wire RTD Accuracy.

Sensor Type	Sensitivity @ 0°C	30m 24AWG Copper Lead ($2 \cdot R_{\text{lead}} \approx 5.04\ \Omega$)	Resulting Lead Error
PT1000 RTD	3.85 Ω/°C	5.04 Ω added	~1.31°C Error
PT100 RTD	0.385 Ω/°C	5.04 Ω added	~13.09°C Error

7. Self-Heating Limits and Excitation Current Rules

Excitation current ($I_{\text{exc}}$) flowing through a PT1000 dissipates power as thermal energy ($P = I^2 \cdot R$). The resulting temperature rise above ambient is dictated by the dissipation constant $E_k$ ($\text{mW/}^\circ\text{C}$):
$$\Delta T_{\text{self-heat}} = \frac{I^2 \cdot R}{E_k}$$

Medium & Flow State Typical $E_k$ Self-Heat at 1.0 mA ($P = 1.0\text{ mW}$) Self-Heat at 0.1 mA ($P = 0.01\text{ mW}$)

Still Air ~2 mW/°C +0.50°C Error +0.005°C (Negligible)

Stirred Water / Liquid ~30-100 mW/°C +0.01°C to +0.03°C +0.0001°C

Rule of Thumb: Limit excitation current to $\le 0.3\text{ mA}$ for PT1000 elements operating in air or gas streams.

Medium & Flow State	Typical $E_k$	Self-Heat at 1.0 mA ($P = 1.0\text{ mW}$)	Self-Heat at 0.1 mA ($P = 0.01\text{ mW}$)
Still Air	~2 mW/°C	+0.50°C Error	+0.005°C (Negligible)
Stirred Water / Liquid	~30-100 mW/°C	+0.01°C to +0.03°C	+0.0001°C

8. Thin-Film vs. Wire-Wound PT1000 Construction

Construction Type Standard Temperature Range Vibration Resistance High-Temperature (>500°C) Behavior

Thin-Film (Platinum on Ceramic) -50°C to 500°C (Special up to 600°C) High (Solid State Substrate) Substrate stress may cause baseline drift above 500°C.

Wire-Wound (Helical Coil in Ceramic/Glass) -200°C to 850°C Moderate (Coil strain sensitive) Highly stable up to 850°C; low thermal hysteresis.

Construction Type	Standard Temperature Range	Vibration Resistance	High-Temperature (>500°C) Behavior
Thin-Film (Platinum on Ceramic)	-50°C to 500°C (Special up to 600°C)	High (Solid State Substrate)	Substrate stress may cause baseline drift above 500°C.
Wire-Wound (Helical Coil in Ceramic/Glass)	-200°C to 850°C	Moderate (Coil strain sensitive)	Highly stable up to 850°C; low thermal hysteresis.

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