5626/5628 Secondary SPRT, PRT, Temperature Sensors

Fluke Calibration’s high-temp secondary standards fill the gap between affordable, but temperature-limited secondary PRTs and highly accurate SPRTs

High-temperature secondary standards

  • Range to 661°C
  • Meets all ITS-90 requirements for resistance ratios
  • Rtp drift < 20 mK after 500 hours at 661°C
  • Calibrated accuracy of ± 0.006 °C at 0 °C
Fluke Calibration's high-temp secondary standards fill the gap between affordable, but temperature-limited secondary PRTs (platinum resistance thermometers) and more expensive, highly accurate SPRTs (standard platinum resistance thermometers).

If you’re using block calibrators, furnaces, or temperature points above normal PRT (platinum resistance thermometer) temperatures (420 °C), then these two PRTs are for you.

The 5626 is nominally 100W and the 5628 is nominally 25.5W. Both instruments have a temperature range of –200 °C to 661 °C. They make great working or check standards for calibration work up to the aluminum point.

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 (standard platinum resistance thermometers), 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 and 5628 are 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. Fluke Calibration’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!

 

 

 

Specifications

TemperatureRange  –200 °C to 661 °C
Handle Temp.  0 °C to 80 °C
RTPW  5626: 100 W (± 1 W) 5628: 25.5 W (± 0.5 W) 
W(Ga)  ³ 1.11807
Calibrated Accuracy (k=2)  ± 0.006 °C at –200 °C ± 0.006 °C at 0 °C ± 0.015 °C at 420 °C ± 0.022 °C at 661 °C
Stability  5626: ± 0.003 °C 5628: ± 0.002 °C
Long-Term Drift (k-2)  5626:  < 0.006 °C/100 hours at 661 °C 5628: < 0.004 °C/100 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 in) standard, custom lengths available
Calibration  Accredited calibrations from Fluke Calibration
Includes calibration and 100 hr drift
 

 

Model Name

Description

5626-12-X Secondary Standard PRT (0.25 in dia x 12 in), 100 Ω, –200 °C to 661 °C (17025 accredited calibration included. Traceable to NIST standards.) X = termination. Specify “A” (INFO-CON for 914X), “B” (bare wire), “D” (5-pin DIN for Tweener Thermometers), “G” (gold pins), “I” (INFO-CON for 1521 or 1522), “J” (banana plugs), “L” (mini spade lugs), “M” (mini banana plugs), “P” (INFO-CON for 1523 or 1524), or “S” (spade lugs).X = termination.
5626-15-X Secondary Standard PRT (0.25 in dia x 15 in), 100 Ω, –200 °C to 661 °C (17025 accredited calibration included. Traceable to NIST standards.) X = termination. Specify “A” (INFO-CON for 914X), “B” (bare wire), “D” (5-pin DIN for Tweener Thermometers), “G” (gold pins), “I” (INFO-CON for 1521 or 1522), “J” (banana plugs), “L” (mini spade lugs), “M” (mini banana plugs), “P” (INFO-CON for 1523 or 1524), or “S” (spade lugs).X = termination.
5626-20-X High-temp PRT, 100W, 508 mm (20 in) Includes case (17025 accredited calibration included. Traceable to NIST standards.) X = termination. Specify “A" (INFO-CON for 914X), “B" (bare wire), “D" (5-pin DIN for Tweener Thermometers), “G" (gold pins), “I" (INFO-CON for 1521 or 1522), “J" (banana plugs), “L" (mini spade lugs), “M" (mini banana plugs), “P" (INFO-CON for 1523 or 1524), or “S" (spade lugs)
5628-12-X Secondary Standard PRT (0.25 in dia x 12 in), 25 Ω, –200 °C to 661 °C (17025 accredited calibration included. Traceable to NIST standards.) X = termination. Specify “A” (INFO-CON for 914X), “B” (bare wire), “D” (5-pin DIN for Tweener Thermometers), “G” (gold pins), “I” (INFO-CON for 1521 or 1522), “J” (banana plugs), “L” (mini spade lugs), “M” (mini banana plugs), “P” (INFO-CON for 1523 or 1524), or “S” (spade lugs).
5628-15-X Secondary Standard PRT (0.25 in dia x 15 in), 25 Ω, –200 °C to 661 °C (17025 accredited calibration included. Traceable to NIST standards.) X = termination. Specify “A” (INFO-CON for 914X), “B” (bare wire), “D” (5-pin DIN for Tweener Thermometers), “G” (gold pins), “I” (INFO-CON for 1521 or 1522), “J” (banana plugs), “L” (mini spade lugs), “M” (mini banana plugs), “P” (INFO-CON for 1523 or 1524), or “S” (spade lugs).
5628-20-X High-temp PRT, 25.5W, 508 mm (20 in) Includes case (17025 accredited calibration included. Traceable to NIST standards.) X = termination. Specify “A" (INFO-CON for 914X), “B" (bare wire), “D" (5-pin DIN for Tweener Thermometers), “G" (gold pins), “I" (INFO-CON for 1521 or 1522), “J" (banana plugs), “L" (mini spade lugs), “M" (mini banana plugs), “P" (INFO-CON for 1523 or 1524), or “S" (spade lugs)

Accessories common to all models:

Accessory

Description

2609 Probe Carrying Case, Plastic (for probes 305 mm [12 in] or greater in length)
 

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