Fluke 5626/5628 Secondary Standard PRT Probes - Choice of Termination

The ideal solution for special temperature measurement applications requires a fast response or short immersion over a wide temperature range. Make great work or check standards for calibration work up to the aluminum point. Termination ranges available from A to S. Termination Key

If you're using block calibrators, furnaces, or temperature points above normal PRT (platinum resistance thermometer) temperatures (420 °C), these two PRTs are for you. The Fluke 5626 is nominally 100 Ω and the 5628 (formerly Hart Scientific) is nominally 25.5 Ω. 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.

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 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 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.

Key Features

• 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

Product Ranges

• Fluke 5626-12-A Secondary Standard PRT Probe, 100 Ohm, 1/4 × 12
• Fluke 5626-12-B Secondary Standard PRT Probe, 100 Ohm, 1/4 × 12
• Fluke 5626-12-D Secondary Standard PRT Probe, 100 Ohm, 1/4 × 12
• Fluke 5626-12-G Secondary Standard PRT Probe, 100 Ohm, 1/4 × 12
• Fluke 5626-12-J Secondary Standard PRT Probe, 100 Ohm, 1/4 × 12
• Fluke 5626-12-L Secondary Standard PRT Probe, 100 Ohm, 1/4 × 12
• Fluke 5626-12-M Secondary Standard PRT Probe, 100 Ohm, 1/4 × 12
• Fluke 5626-12-P Secondary Standard PRT Probe, 100 Ohm, 1/4 × 12
• Fluke 5626-12-S Secondary Standard PRT Probe, 100 Ohm, 1/4 × 12
• Fluke 5626-15-A Secondary Standard PRT Probe, 100 Ohm, 1/4 × 15
• Fluke 5626-15-B Secondary Standard PRT Probe, 100 Ohm, 1/4 × 15
• Fluke 5626-15-D Secondary Standard PRT Probe, 100 Ohm, 1/4 × 15
• Fluke 5626-15-G Secondary Standard PRT Probe, 100 Ohm, 1/4 × 15
• Fluke 5626-15-J Secondary Standard PRT Probe, 100 Ohm, 1/4 × 15
• Fluke 5626-15-L Secondary Standard PRT Probe, 100 Ohm, 1/4 × 15
• Fluke 5626-15-M Secondary Standard PRT Probe, 100 Ohm, 1/4 × 15
• Fluke 5626-15-P Secondary Standard PRT Probe, 100 Ohm, 1/4 × 15
• Fluke 5626-15-S Secondary Standard PRT Probe, 100 Ohm, 1/4 × 15
• Fluke 5626-20-A Secondary Standard PRT Probe, 100 Ohm, 1/4 × 20
• Fluke 5626-20-B Secondary Standard PRT Probe, 100 Ohm, 1/4 × 20
• Fluke 5626-20-D Secondary Standard PRT Probe, 100 Ohm, 1/4 × 20
• Fluke 5626-20-G Secondary Standard PRT Probe, 100 Ohm, 1/4 × 20
• Fluke 5626-20-J Secondary Standard PRT Probe, 100 Ohm, 1/4 × 20
• Fluke 5626-20-L Secondary Standard PRT Probe, 100 Ohm, 1/4 × 20
• Fluke 5626-20-M Secondary Standard PRT Probe, 100 Ohm, 1/4 × 20
• Fluke 5626-20-P Secondary Standard PRT Probe, 100 Ohm, 1/4 × 20
• Fluke 5626-20-S Secondary Standard PRT Probe, 100 Ohm, 1/4 × 20
• Fluke 5628-12-A Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 12
• Fluke 5628-12-B Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 12
• Fluke 5628-12-D Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 12
• Fluke 5628-12-G Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 12
• Fluke 5628-12-J Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 12
• Fluke 5628-12-L Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 12
• Fluke 5628-12-M Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 12
• Fluke 5628-12-P Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 12
• Fluke 5628-12-S Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 12
• Fluke 5628-15-A Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 15
• Fluke 5628-15-B Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 15
• Fluke 5628-15-D Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 15
• Fluke 5628-15-G Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 15
• Fluke 5628-15-J Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 15
• Fluke 5628-15-L Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 15
• Fluke 5628-15-M Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 15
• Fluke 5628-15-P Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 15
• Fluke 5628-15-S Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 15
• Fluke 5628-20-A Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 20
• Fluke 5628-20-B Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 20
• Fluke 5628-20-D Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 20
• Fluke 5628-20-G Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 20
• Fluke 5628-20-J Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 20
• Fluke 5628-20-L Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 20
• Fluke 5628-20-M Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 20
• Fluke 5628-20-P Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 20
• Fluke 5628-20-S Secondary Standard PRT Probe, 25.5 Ohm, 1/4 × 20

• Termination Key:
• A (INFO-CON for 914X)
• B (Bare wire)
• D (5-pin DIN for Tweener Thermometers)
• G (Gold pins)
• J (Banana plugs)
• L (Mini spade lugs)
• M (Mini banana plugs)
• P (INFO-CON for 1523 or 1524)
• S (Spade lugs)