Platinum resistive temperature probe 5606

insertionfor laboratory freezers

Product overview
The Fluke 5606 Full Immersion Platinum Resistance Thermometer (PRT) is an ultra‑compact probe engineered for true full immersion use — including the transition junction and lead wires — across an operating range of -200 °C to 160 °C. The probe features a 50 mm sheath, 3.1 mm diameter, a 100 Ω precision sensing element (alpha = 0.00385) and single‑conductor enameled copper leads with a moisture‑blocking probe seal for long‑term stability in demanding environments.

Key features

• Operating range: -200 °C to 160 °C.
• Calibration accuracy performance to ±0.05 °C (depending on point and calibration option).
• True full immersion: transition junction and lead wires rated for full temperature range; no separate minimum immersion calculations required for full‑immersion applications.
• Single‑conductor enameled copper leads to reduce moisture wicking versus stranded leads.
• Dedicated probe seal to prevent moisture ingress.
• Compact probe geometry: 50 mm sheath length, 3.1 mm diameter; sensing element positioned near the tip for fast response in confined spaces.
• NVLAP‑accredited calibration available (recommended for laboratory qualification and traceability).
• Proven compatibility with heat transfer fluids and extreme cold (e.g., liquid nitrogen) without loss of transition‑junction integrity.

Applications and benefits

• Calibration and validation of sensors in laboratory/freezers, bio‑freezers, autoclaves, ovens and test chambers.
• IQ/OQ/PQ qualification procedures and temperature mapping.
• Data logging in temperature‑controlled enclosures and environmental chambers.
• Routing through tight openings (lead wires ≤ 0.2 mm dia.) such as freezer doors with minimal thermal leakage.

Technical specifications

• Model: 5606 Full Immersion PRT.
• Temperature range: -200 °C to 160 °C.
• Nominal resistance at 0.01 °C: 100 Ω ± 0.1 Ω.
• Temperature coefficient (alpha): 0.00385 Ω/Ω/°C.
• Accuracy examples: ±0.04 °C at 0.01 °C; ±0.06 °C at 160 °C (see calibration options).
• Short‑term repeatability: ±0.03 °C at 0.01 °C; ±0.04 °C at 160 °C.
• Drift (after 100 h at max temp): ±0.03 °C at 0.01 °C; ±0.04 °C at 160 °C.
• Hysteresis: ±0.015 °C.
• Sheath length: 50 mm ± 5 mm.
• Sheath diameter: 3.1 mm ± 0.1 mm.
• Sheath material: 316 stainless steel.
• Transition junction: rated -200 °C to 160 °C (designed for full immersion).
• Sensor length/location: 30 mm ± 3 mm; sensor located ~3 mm from tip.
• Minimum insulation resistance: 20 MΩ at 23 °C.
• Minimum/maximum immersion depth: full immersion permitted (liquid and dry media).
• Response time (ASTM E 644): ~12 s typical.
• Self‑heating (in 0 °C bath): ±0.003 °C.
• Lead‑wire: enameled copper wire, 2.4 m length; rated to 160 °C.
• Calibration: not included; NVLAP‑accredited calibration available (see ordering information).
• Calibration uncertainty examples (lab code 200348‑0): -197 °C: 0.03 °C; -38 °C: 0.03 °C; 0 °C: 0.03 °C; 100 °C: 0.045 °C; 157 °C: 0.05 °C.
• Uncalibrated tolerance reference: ASTM E1137 Grade A: ±[0.13 + 0.0017|t|] °C.
• Recommended coefficients (use R0 from certificate): A = 3.9083×10⁻³, B = −5.775×10⁻⁷, C = −4.183×10⁻¹².