Fluke Calibration 5626-15-D Secondary PRT Probe

Overview

The Fluke Calibration 5626-15-D is a secondary standard platinum resistance thermometer (PRT) designed for high-temperature calibration applications. With a temperature range of -200°C to 661°C and 100 ohm nominal resistance, it provides an affordable alternative to more expensive standard platinum resistance thermometers (SPRTs). The 5-pin DIN termination is specifically designed for compatibility with Fluke Tweener thermometers. The probe features Inconel 600 sheath construction and strain-free sensor design developed by SPRT engineers to minimize contamination risk while maintaining reliable performance.

Key Features

• Secondary standard PRT with 100 ohm nominal resistance (±1 ohm)
• Temperature range of -200°C to 661°C with minimal drift (< 20 mK after 500 hours at 661°C)
• 1/4 inch diameter x 15 inch (381 mm) sheath length
• Inconel 600 sheath material for durability and contamination resistance
• 4-wire Super-Flex PVC lead wires (22 AWG)
• 5-pin DIN termination for Tweener thermometer compatibility
• Strain-free sensor design by SPRT engineers
• Meets all ITS-90 requirements for resistance ratios
• Minimum 5-inch (12.7 cm) immersion depth recommended

Applications

• Block calibrator and furnace calibration
• Temperature calibration up to aluminum point (661°C)
• Working or check standard for secondary calibration applications
• Use with Fluke Tweener thermometers for integrated calibration workflows