Thermometer Probe Selection Guide

Platinum Resistance Thermometers, Thermistors, and Thermocouples from Fluke Calibration

Thermometer Probe Selection Guide

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)

Platinum Resistance Thermometer: Secondary Standard PRT

Model Range SizeBasic Accuracy
5608-9-X–200 to 500 °C9 in x 1/8 inSelect from available calibration options
5608-12-X–200 to 500 °C12 in x 1/8 in
5609-12-X–200 to 670 °C12 in x 1/4 in
5609-15-X–200 to 670 °C15 in x 1/4 in
5609-20-X–200 to 670 °C20 in x 1/4 in
5609-300-X–200 to 670 °C300 mm x 6 mm
5609-400-X–200 to 670 °C400 mm x 6 mm
5609-500-X–200 to 670 °C500 mm x 6 mm
5626 –200 °C to 661 °C305 or 381 x 6.35 mm (12 or 15 x 0.25 in±0.007 °C at 0 °C
5628 –200 °C to 661 °C305 or 381 x 6.35 mm (12 or 15 x 0.25 in)±0.006 °C at 0 °C

Platinum Resistance Thermometer: Secondary Reference PRT

5616-12–200 °C to 420 °C6.35 mm x 298 mm (0.250 x 11.75 in)± 0.010 °C at 0.010 °C
5615-6 –200 to 300 °C4.76 mm x 152 mm (0.188 x 6.0 in)± 0.013 °C at 0.010 °C
5615-9–200 °C to 420 °C4.76 mm x 229 mm (0.188 x 9.0 in)± 0.013 °C at 0.010 °C
5615-12–200 °C to 420 °C6.35 mm x 305 mm (0.250 x 12.0 in)± 0.013 °C at 0.010 °C

Platinum Resistance Thermometer: Precision Industrial PRT 

5627A-6–200 °C to 300 °C152 x 4.7 mm (6 x 0.187 in)±0.05 °C at 0 °C
5627A-9–200 °C to 300 °C229 x 4.7 mm (9 x 0.187 in)±0.05 °C at 0 °C
5627A-12–200 °C to 420 °C305 x 6.35 mm (12 x 0.25 in)±0.05 °C at 0 °C

Platinum Resistance Thermometer: Fast Response PRT

5622-05–200 °C to 350 °C100 x 0.5 mm±0.04 °C at 0 °C
5622-10–200 °C to 350 °C100 x 1.0 mm±0.04 °C at 0 °C
5622-16–200 °C to 350 °C200 x 1.6 mm±0.04 °C at 0 °C
5622-32–200 °C to 350 °C200 x 3.2 mm±0.04 °C at 0 °C

Platinum Resistance Thermometer: Small Diameter Industrial PRTs

5618B-6–200 °C to 300 °C152 x 3.2 mm (6 x 0.125 in)±0.05 °C
5618B-9–200 °C to 500 °C229 x 3.2 mm (9 x 0.125 in)±0.05 °C
5618B-12–200 °C to 500 °C305 x 3.2 mm (12 x 0.125 in)±0.05 °C

Platinum Resistance Thermometer: Full Immersion PRTs 

5606 Immersion PRT–200 to 160 °C50 x 3.1 mm ( 2 x 1/8 in)±0.05 °C       
5607 Immersion PRT0 to 450 °C75 x 3.1 mm (3 x 1/8 in)±0.055 °C
5623B Freezer Probe –100 °C to 156 °C152 x 6.35 mm (6 x 0.25 in) ±0.05 °C 

Platinum Resistance Thermometer: High Temperature PRT

5624 High Temperature PRT 0 °C to 1000 °C508 x 6.35 mm (20 x 0l25 in)±0.055 °C

Thermistors 
Thermistor: Standards 

5640 0 °C to 60 °C229 x 6.35 mm (9 x 0.25 in)±0.0015 °C
5641 0 °C to 60 °C114 x 3.2 mm (4.5 x 0.125 in)±0.001 °C
5642 0 °C to 60 °C229 x 3.2 mm (9 x 0.125 in)±0.001 °C
5643 0 °C to 100 °C114 x 3.2 mm (4.5 x 0.125 in)±0.0025 °C
5644 0 °C to 100 °C229 x 3.2 mm (9 x 0.125 in)±0.0025 °C

Thermistor: Secondary Probes 

5610 0 °C to 100 °C152 or 229 x 3.2 mm (6 or 9 x 0.125 in)±0.01 °C
5611A 0 °C to 100 °C1.5 mm  (0.06 in) tip dia.±0.01 °C
5611T 0 °C to 100 °C28 x 3 mm (1.1 x 0.12 in)±0.01 °C
5665 0 °C to 100 °C76 x 3.2 mm (3 x 0.125 in)±0.01 °C

Thermocouples 

Thermocouple: Type R and S Standards

5649/5650-200 °C to 1450 °C 508 x 6.35 mm (20 x 0.25 in)±0.7 °C at 1100 °C
5649/5650-20C0 °C to 1450 °C 508 x 6.35 mm (20 x 0.25 in)±0.7 °C at 1100 °C
5649/5650-250 °C to 1450 °C 635 x 6.35 mm (20 x 0.25 in)±0.7 °C at 1100 °C
5649/5650-25C0 °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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