Thermometer Probe Selection Guide
Platinum Resistance Thermometers, Thermistors, and Thermocouples from Fluke Calibration
| Fluke Calibration manufactures platinum resistance thermometers, thermocouples, thermistor temperature sensors for precision temperature measurement and calibration. High temperature thermometers for furnaces, ovens, and high temperature calibration include noble metal thermocouples and high temperature PRTs. Low temperature thermometers for freezers, cryogenics, and low temperature calibration include our freezer thermometer, secondary standard thermometers and secondary reference thermometers. These probes may be used for temperature measuring, temperature calibration, temperature monitoring and temperature validation. We also offer a complete selection of thermometer readouts for measuring and displaying the temperature readings of these probes. In addition our calibration laboratory offers a wide range of accredited calibration services to meet your accuracy needs. |  |
Fluke Calibration Platinum Resistance Thermometers (PRTs) |
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Model |
Range |
Size |
Basic Accuracy† |
Platinum Resistance Thermometer: Secondary Standard PRT |
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| 5608-9-X | –200 to 500 °C | 9 in x 1/8 in | Select from available calibration options |
| 5608-12-X | –200 to 500 °C | 12 in x 1/8 in | |
| 5609-12-X | –200 to 670 °C | 12 in x 1/4 in | |
| 5609-15-X | –200 to 670 °C | 15 in x 1/4 in | |
| 5609-20-X | –200 to 670 °C | 20 in x 1/4 in | |
| 5609-300-X | –200 to 670 °C | 300 mm x 6 mm | |
| 5609-400-X | –200 to 670 °C | 400 mm x 6 mm | |
| 5609-500-X | –200 to 670 °C | 500 mm x 6 mm | |
| –200 °C to 661 °C |
305 or 381 x 6.35 mm (12 or 15 x 0.25 in |
±0.007 °C at 0 °C |
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| –200 °C to 661 °C |
305 or 381 x 6.35 mm (12 or 15 x 0.25 in) |
±0.006 °C at 0 °C |
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Platinum Resistance Thermometer: Secondary Reference PRT |
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| 5616-12 | –200 °C to 420 °C | 6.35 mm x 298 mm (0.250 x 11.75 in) | ± 0.010 °C at 0.010 °C |
| 5615-6 | –200 to 300 °C | 4.76 mm x 152 mm (0.188 x 6.0 in) | ± 0.013 °C at 0.010 °C |
| 5615-9 | –200 °C to 420 °C | 4.76 mm x 229 mm (0.188 x 9.0 in) | ± 0.013 °C at 0.010 °C |
| 5615-12 | –200 °C to 420 °C | 6.35 mm x 305 mm (0.250 x 12.0 in) | ± 0.013 °C at 0.010 °C |
Platinum Resistance Thermometer: Precision Industrial PRT |
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| 5627A-6 | –200 °C to 300 °C | 152 x 4.7 mm (6 x 0.187 in) | ±0.05 °C at 0 °C |
| 5627A-9 | –200 °C to 300 °C | 229 x 4.7 mm (9 x 0.187 in) | ±0.05 °C at 0 °C |
| 5627A-12 | –200 °C to 420 °C | 305 x 6.35 mm (12 x 0.25 in) | ±0.05 °C at 0 °C |
Platinum Resistance Thermometer: Fast Response PRT |
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| 5622-05 | –200 °C to 350 °C | 100 x 0.5 mm | ±0.04 °C at 0 °C |
| 5622-10 | –200 °C to 350 °C | 100 x 1.0 mm | ±0.04 °C at 0 °C |
| 5622-16 | –200 °C to 350 °C | 200 x 1.6 mm | ±0.04 °C at 0 °C |
| 5622-32 | –200 °C to 350 °C | 200 x 3.2 mm | ±0.04 °C at 0 °C |
Platinum Resistance Thermometer: Small Diameter Industrial PRTs |
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| 5618B-6 | –200 °C to 300 °C | 152 x 3.2 mm (6 x 0.125 in) | ±0.05 °C |
| 5618B-9 | –200 °C to 500 °C | 229 x 3.2 mm (9 x 0.125 in) | ±0.05 °C |
| 5618B-12 | –200 °C to 500 °C | 305 x 3.2 mm (12 x 0.125 in) | ±0.05 °C |
Platinum Resistance Thermometer: Full Immersion PRTs |
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| –200 to 160 °C | 50 x 3.1 mm ( 2 x 1/8 in) | ±0.05 °C | |
| 0 to 450 °C | 75 x 3.1 mm (3 x 1/8 in) |
±0.055 °C |
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| –100 °C to 156 °C |
152 x 6.35 mm (6 x 0.25 in) |
±0.05 °C |
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Platinum Resistance Thermometer: High Temperature PRT |
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| 5624 High Temperature PRT | 0 °C to 1000 °C | 508 x 6.35 mm (20 x 0l25 in) | ±0.055 °C |
Thermistors |
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Thermistor: Standards |
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| 5640 | 0 °C to 60 °C | 229 x 6.35 mm (9 x 0.25 in) | ±0.0015 °C |
| 5641 | 0 °C to 60 °C | 114 x 3.2 mm (4.5 x 0.125 in) | ±0.001 °C |
| 5642 | 0 °C to 60 °C | 229 x 3.2 mm (9 x 0.125 in) | ±0.001 °C |
| 5643 | 0 °C to 100 °C | 114 x 3.2 mm (4.5 x 0.125 in) | ±0.0025 °C |
| 5644 | 0 °C to 100 °C | 229 x 3.2 mm (9 x 0.125 in) | ±0.0025 °C |
Thermistor: Secondary Probes |
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| 5610 | 0 °C to 100 °C | 152 or 229 x 3.2 mm (6 or 9 x 0.125 in) | ±0.01 °C |
| 5611A | 0 °C to 100 °C | 1.5 mm (0.06 in) tip dia. | ±0.01 °C |
| 5611T | 0 °C to 100 °C | 28 x 3 mm (1.1 x 0.12 in) | ±0.01 °C |
| 5665 | 0 °C to 100 °C | 76 x 3.2 mm (3 x 0.125 in) | ±0.01 °C |
Thermocouples |
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Thermocouple: Type R and S Standards |
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| 5649/5650-20 | 0 °C to 1450 °C | 508 x 6.35 mm (20 x 0.25 in) | ±0.7 °C at 1100 °C |
| 5649/5650-20C | 0 °C to 1450 °C | 508 x 6.35 mm (20 x 0.25 in) | ±0.7 °C at 1100 °C |
| 5649/5650-25 | 0 °C to 1450 °C | 635 x 6.35 mm (20 x 0.25 in) | ±0.7 °C at 1100 °C |
| 5649/5650-25C | 0 °C to 1450 °C | 635 x 6.35 mm (20 x 0.25 in) | ±0.7 °C at 1100 °C |
| †“Basic Accuracy” includes calibration uncertainty and short-term repeatability. It does not include long-term drift. | |||
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