Primary Standards Selection Guide
Primary Standards for Temperature Calibration
|The defining instruments of the ITS-90 (International Temperature Scale of 1990) are Standard Platinum Resistance Thermometers (SPRT) and ITS-90 fixed point cells. SPRTs are calibrated in fixed point cells to provide the highest possible temperature accuracy. Primary standards offered by Fluke Calibration include Standard Platinum Resistance Thermometers, ITS-90 fixed point cells and all of the equipment and services necessary for calibration traceable to the ITS-90, including, furnaces, baths, resistance bridges, and standard resistors.|
|5681||25.5 Ω||–200 °C to 670 °C, quartz sheath|
|5683||25.5 Ω||–200 °C to 480 °C, quartz sheath|
|5684||0.25 Ω||0 °C to 1070 °C, quartz sheath|
|5685||2.5 Ω||0 °C to 1070 °C, quartz sheath|
|5698||25.5 Ω||–200 °C to 670 °C, working standard, , quartz sheath|
|5699||25.5 Ω||–200 °C to 670 °C, high temperature, metal sheath|
|5686||25.5 Ω||–260 °C to 232 °C, glass capsule|
Triple point of water cells
|5901A-G||TPW Cell, 12 mm ID with handle, glass shell||0.01 °C|
|5901A-Q||TPW Cell, 12 mm ID with handle, quartz shell||0.01 °C|
|5901C-G||TPW Cell, 13.6 mm ID with handle, glass shell||0.01 °C|
|5901C-Q||TPW Cell, 13.6 mm ID with handle, quartz shell||0.01 °C|
|5901D-G||TPW Cell, 12 mm ID, glass shell||0.01 °C|
|5901D-Q||TPW Cell, 12 mm ID, quartz shell||0.01 °C|
|5901B-G||TPW Cell, mini, glass shell||0.01 °C|
Standard size fixed-point cells
|5900E||TP Mercury, SST||–38.8344 °C|
|5904||Freezing Point of Indium||156.5985 °C|
|5905||Freezing Point of Tin||231.928 °C|
|5906||Freezing Point of Zinc||419.527 °C|
|5907||Freezing Point of Aluminum||660.323 °C|
|5908||Freezing Point of Silver||961.78 °C|
|5909||Freezing Point of Copper||1084.62 °C|
|5924||Open Freezing Point of Indium||156.5985 °C|
|5925||Open Freezing Point of Tin||231.928 °C|
|5926||Open Freezing Point of Zinc||419.527 °C|
|5927A||Open Freezing Point of Aluminum||660.323 °C|
|5928||Open Freezing Point of Silver||961.78 °C|
|5929||Open Freezing Point of Copper||1084.62 °C|
|5943||Melting Point of Gallium, SST||29.7646 °C|
Mini triple point of water and fixed-point cells
|5901B||Mini Triple Point of Water||0.01 °C|
|5914A||Mini Freezing Point of Indium||156.5985 °C|
|5915A||Mini Freezing Point of Tin||231.928 °C|
|5916A||Mini Freezing Point of Zinc||419.527 °C|
|5917A||Mini Freezing Point of Aluminum||660.323 °C|
|5918A||Mini Freezing Point of Silver||961.78 °C|
|5919A||Mini Freezing Point of Copper||1084.62 °C|
|5944||Mini Freezing Point of Indium, Metal Cased||156.5985 °C|
|5945||Mini Freezing Point of Tin, Metal Cased||231.928 °C|
|5946||Mini Freezing Point of Zinc, Metal Cased||419.527 °C|
|5947||Mini Freezing Point of Aluminum, Metal Cased||660.323 °C|
|7012||Maintains: triple point of water and gallium cells.
Comparisons: –10 °C to 110 °C.
|7037||Maintains: triple point of water and gallium cells.
Comparisons: –40 °C to 110 °C.
|7312||Maintains: two TPW cells. Compact size, runs quietly.
Comparisons: –5 °C to 110 °C.
|7341||Maintains: triple point of mercury cell.
Comparisons: –45 °C to 150 °C.
|9210||Maintains: mini triple point of water.
Comparisons: –10 °C to 125 °C.
|9230||Maintains: stainless steel gallium cell.
Comparisons: 15 °C to 35 °C.
|9260||Maintains: indium, tin, zinc, and aluminum cells.
Comparisons: 50 °C to 680 °C.
|9114||Maintains: indium, tin, zinc, and aluminum cells.
Comparisons: 100 °C to 680 °C.
|9115||Maintains: aluminum and silver cells.
Comparisons: 550 °C to 1000 °C.
|9116||Maintains: aluminum, silver, gold, and copper cells.
Comparisons: 400 °C to 1100 °C.
|9117||Anneals SPRTs, HTPRTs, and thermocouples to 1100 °C.
Protects them against contamination from metal ions.
|7196||Affordable substitute for a triple point of argon system. Provides for low-temperature comparison calibrations at approximately –196 °C with uncertainties of 2 mK.|
|1595A||0.06 ppm accuracy for calibration of SPRTs and thermistors.|
|742A||Excellent performance without oil or air baths. Values from 10 ohm to 100 megohm.|
|5430||Highest stability oil-filled resistors (< 2 ppm/year drift). AC cal uncertainty to 3 ppm.|
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