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Temperature Standards

Primary Standards for
Temperature Calibration

SPRTs

Model RTPQ Range Email
5681 25.5 Ω –200 °C to 670 °C Enquiry
5683 25.5 Ω –200 °C to 480 °C Enquiry
5684 0.25 Ω 0 °C to 1070 °C Enquiry
5685 2.5 Ω 0 °C to 1070 °C Enquiry
5698 25.5 Ω –200 °C to 670 °C Enquiry
5699 25.5 Ω –200 °C to 670 °C Enquiry
5686 25.5 Ω –260 °C to 232 °C Enquiry
5695 25.5 Ω –200 °C to 500 °C Enquiry

Fixed-Point Cells

Model Description Temperature Email
5901A-G TPW Cell, 12 mm ID with handle, glass shell 0.01 °C Enquiry
5901A-Q TPW Cell, 12 mm ID with handle, quartz shell 0.01 °C Enquiry
5901C-G TPW Cell, 13.6 mm ID with handle, glass shell 0.01 °C Enquiry
5901C-Q TPW Cell, 13.6 mm ID with handle, quartz shell 0.01 °C Enquiry
5901D-G TPW Cell, 12 mm ID, glass shell 0.01 °C Enquiry
5901D-Q TPW Cell, 12 mm ID, quartz shell 0.01 °C Enquiry
5901B-G TPW Cell, mini, glass shell 0.01 °C Enquiry
5900 TP Mercury, SST –38.8344 °C Enquiry
5904 Freezing Point of Indium 156.5985 °C Enquiry
5905 Freezing Point of Tin 231.928 °C Enquiry
5906 Freezing Point of Zinc 419.527 °C Enquiry
5907 Freezing Point of Aluminum 660.323 °C Enquiry
5908 Freezing Point of Silver 961.78 °C Enquiry
5909 Freezing Point of Copper 1084.62 °C Enquiry
5924 Open Freezing Point of Indium 156.5985 °C Enquiry
5925 Open Freezing Point of Tin 231.928 °C Enquiry
5926 Open Freezing Point of Zinc 419.527 °C Enquiry
5927A Open Freezing Point of Aluminum 660.323 °C Enquiry
5928 Open Freezing Point of Silver 961.78 °C Enquiry
5929 Open Freezing Point of Copper 1084.62 °C Enquiry
5943 Melting Point of Gallium, SST 29.7646 °C Enquiry
5901B Mini Triple Point of Water 0.01 °C Enquiry
5914A Mini Freezing Point of Indium 156.5985 °C Enquiry
5915A Mini Freezing Point of Tin 231.928 °C Enquiry
5916A Mini Freezing Point of Zinc 419.527 °C Enquiry
5917A Mini Freezing Point of Aluminum 660.323 °C Enquiry
5918A Mini Freezing Point of Silver 961.78 °C Enquiry
5919A Mini Freezing Point of Copper 1084.62 °C Enquiry
5944 Mini Freezing Point of Indium, Metal Cased 156.5985 °C Enquiry
5945 Mini Freezing Point of Tin, Metal Cased 231.928 °C Enquiry
5946 Mini Freezing Point of Zinc, Metal Cased 419.527 °C Enquiry
5947 Mini Freezing Point of Aluminum, Metal Cased 660.323 °C Enquiry

Apparatus

Model Features/Use Email
7012 Maintains: triple point of water and gallium cells.
Comparisons: –10 °C to 110 °C. 		Enquiry
 
7037 Maintains: triple point of water and gallium cells.
Comparisons: –40 °C to 110 °C. 		Enquiry
7312 Maintains: two TPW cells. Compact size, runs quietly.
Comparisons: –5 °C to 110 °C. 		Enquiry
7341 Maintains: triple point of mercury cell.
Comparisons: –45 °C to 150 °C. 		Enquiry
9210 Maintains: mini triple point of water and mini gallium cells.
Comparisons: –10 °C to 125 °C. 		Enquiry
9230 Maintains: stainless steel gallium cell.
Comparisons: 15 °C to 35 °C. 		Enquiry
9260 Maintains: indium, tin, zinc, and aluminum cells.
Comparisons: 50 °C to 680 °C. 		Enquiry
9114 Maintains: indium, tin, zinc, and aluminum cells.
Comparisons: 100 °C to 680 °C. 		Enquiry
9115 Maintains: aluminum and silver cells.
Comparisons: 550 °C to 1000 °C. 		Enquiry
9116 Maintains: aluminum, silver, gold, and copper cells.
Comparisons: 400 °C to 1100 °C. 		Enquiry
9117 Anneals SPRTs, HTPRTs, and thermocouples to 1100 °C.
Protects them against contamination from metal ions.
Enquiry

Boiling Point of Liquid Nitrogen

Model Features/Use Email
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. Enquiry
 

Resistance Bridge 

Model Features/Use Email
5581 0.1 ppm accuracy for calibration of standard resistors and SPRTs. 13:1 measurement ratio allows resolution to 0.001 mK. Enquiry
1590 1 ppm accuracy for calibration of SPRTs and thermistors. Enquiry

Standard Resistors

Model Features/Use Email
742A Excellent performance without oil or air baths. Values from 10 ohm to 100 megohm. Enquiry
5430 Highest stability oil-filled resistors (< 2 ppm/year drift). AC cal uncertainty to 3 ppm. Enquiry


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