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Fluke Calibration 5626
Secondary Standard PRT Temperature Sensor

  • Range to 660°C
  • Meets all ITS-90 requirements for resistance ratios
  • Rtp drift < 20mK after 500 hours at 660°C
  • Strain-free sensor design by Hart's SPRT engineers

Hart's high-temp secondary standards fill the gap between affordable, but temperature-limited secondary PRTs and more expensive, highly accurate SPRTs.

If you're using block calibrators, furnaces, or temperature points above normal PRT temperatures (420 °C), then this PRT is for you. The 5626 is nominally 100W and has a temperature range of -200 °C to 661 °C. 5626 makes great working or check standards for calibration work up to the aluminum point.

    Fluke Calibration 5626 Secondary Standard PRT Temperature SensorClick for larger image
5626 Shown with 5628,     
(5628 Currently Unavailable)     

Product Information
Datasheet 142 KB
Ordering Info Jump to Product Models, Prices, Accessories, and Ordering Information
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Using a regular PRT at temperatures above 500 °C exposes the platinum to contamination. If the PRT is used as a reference or calibration standard, contamination is a major problem. SPRTs, which are more expensive and delicate, can handle the higher temperatures, but with greater risk to the instrument due to shock, contamination, or mishandling. The 5626 is designed to reduce the contamination risk through the use of internal protection while not impairing performance.

In addition to the right measurement performance and durability, a PRT for secondary applications should be priced affordably. Hart's new PRTs are inexpensive and come with an accredited calibration. The calibration comes complete with ITS-90 constants and a resistance-versus-temperature table.

Check the temperature range, check the stability, check the price! Who else gives you this much quality, performance, and value for your money? No one!

Temperature Range -200 °C to 661 °C
Handle Temp. 0 °C to 80 °C
RTPW 100W (±1W)
W(Ga) 1.11807
Calibration Uncertainty (k=2) ±0.006 °C at -200 °C
±0.004 °C at 0 °C
±0.009 °C at 420 °C
±0.014 °C at 661 °C
Stability ±0.003 °C
Long-Term Drift < 0.03 °C/500 hours at 661 °C
Immersion At least 12.7 cm (5 in) recommended
Sheath Inconel™ 600
Lead Wires 4-wire Super-Flex PVC, 22 AGW
Termination Gold-plated spade lugs, or specify
Size 6.35 mm dia. x 305 mm, 381 mm, or 508 mm (0.25 x 12, 15, or 20") standard, custom lengths available
Calibration Accredited calibration from Fluke Calibration
Ordering Information
Model Size
Length x Diameter
Type Temp. Range Buy Price
562612A 12 x 1/4" Dia. Base Model -200 to 661°C Discontinued
562612B 12 x 1/4" Dia. Bare Wire -200 to 661°C Discontinued
562612D 12 x 1/4" Dia. 5-pin DIN
for Tweener Thermometers
-200 to 661°C Discontinued
562612G 12 x 1/4" Dia. Gold pins -200 to 661°C Discontinued
562612I 12 x 1/4" Dia. INFO-CON
for 1521/1522
-200 to 661°C Discontinued
562612J 12 x 1/4" Dia. Banana Plugs -200 to 661°C Discontinued
562612L 12 x 1/4" Dia. Mini Space Lugs -200 to 661°C Discontinued
562612M 12 x 1/4" Dia. Mini Banana Plugs -200 to 661°C Discontinued
562612S 12 x 1/4" Dia. Spade Lugs -200 to 661°C Discontinued
562615A 15 x 1/4" Dia. Base Model -200 to 661°C Discontinued
Included Accessories
  • (1) Case