Fluke 5699 High-Temperature Metal-Sheath SPRT

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Product ID : 4016
Brand : Fluke
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Product overview: 5699 High-Temperature Metal-Sheath SPRT

Designed and manufactured by our primary standards metrologists, the strain-free sensing element in the 5699 meets all ITS-90 requirements for SPRTs and minimizes long-term drift.

After one year of regular usage, drift is less than 0.008 °C (< 0.003 °C is typical). Even lower drift rates are possible depending on care and handling. A fifth wire for grounding is added to the four-wire sensor to help reduce electrical noise, particularly for AC measurements. Finally, you can get an improved version of an old industry-standard Inconel-sheathed SPRT.

The 5699 is constructed with a 0.219-inch-diameter Inconel sheath for high durability and fast response times. Inside the sheath, the sensing element is protected by a thin platinum housing that shields the sensor from contamination from free-floating metal ions found within metal environments at high temperatures. Reduced contamination means a low drift rate—even after hours of use in metal-block furnaces at high temperatures.

If you choose not to calibrate the 5699 yourself, a wide variety of options are available from Fluke Calibration’s own primary standards laboratory, including fixed-point calibrations covering any range between –200 °C and 661 °C.

At Fluke Calibration, we use SPRTs every day. We design them, build them, calibrate them, use them as standards, and know what it takes to make a reliably performing instrument. Why buy from anyone else?

Key Features

  • Range up to the aluminum point (660 °C).
  • Features Inconel™ and platinum sheaths that guard against contamination .
  • Less than 8 mK/year drift.
  • Usable in virtually any furnace or bath with temperatures as high as 670 °C.

Specifications: 5699 High-Temperature Metal-Sheath SPRT

Specifications
Temperature Range –200 °C to 661 °C (recommended annealing temperature 
665 °C) 
Nominal RTPW 25.5Ω (± 0.5Ω)
Current 1 mA
Resistance Ratio W(302.9146 K) ≥ 1.11807
W(234.3156 K) ≤ 0.844235
Sensitivity 0.1 Ω/ °C
Drift Rate < 0.008 °C/year (< 0.003 °C/year typical)
Repeatability < 1 mK
Self-heating at TPW < 0.001 °C under 1 mA current
Reproducibility ± 0.001 °C or better
RTPW Drift After Thermal Cycling < 0.001 °C
Diameter of Pt Sensor Wire 0.07 mm  (0.003 in)
Lead Wires Four sensor wires plus grounding wire
Protective Sheath Inconel
Diameter: 5.56 mm ± 0.13 mm (0.219 in ± 0.005 in)
Length: 482 mm (19 in)
Insulation Resistance > 100 MΩ at 661 °C
> 1000 MΩ at 20 °C

N/A

N/A

Product overview: 5699 High-Temperature Metal-Sheath SPRT

Designed and manufactured by our primary standards metrologists, the strain-free sensing element in the 5699 meets all ITS-90 requirements for SPRTs and minimizes long-term drift.

After one year of regular usage, drift is less than 0.008 °C (< 0.003 °C is typical). Even lower drift rates are possible depending on care and handling. A fifth wire for grounding is added to the four-wire sensor to help reduce electrical noise, particularly for AC measurements. Finally, you can get an improved version of an old industry-standard Inconel-sheathed SPRT.

The 5699 is constructed with a 0.219-inch-diameter Inconel sheath for high durability and fast response times. Inside the sheath, the sensing element is protected by a thin platinum housing that shields the sensor from contamination from free-floating metal ions found within metal environments at high temperatures. Reduced contamination means a low drift rate—even after hours of use in metal-block furnaces at high temperatures.

If you choose not to calibrate the 5699 yourself, a wide variety of options are available from Fluke Calibration’s own primary standards laboratory, including fixed-point calibrations covering any range between –200 °C and 661 °C.

At Fluke Calibration, we use SPRTs every day. We design them, build them, calibrate them, use them as standards, and know what it takes to make a reliably performing instrument. Why buy from anyone else?

Key Features

  • Range up to the aluminum point (660 °C).
  • Features Inconel™ and platinum sheaths that guard against contamination .
  • Less than 8 mK/year drift.
  • Usable in virtually any furnace or bath with temperatures as high as 670 °C.

Specifications: 5699 High-Temperature Metal-Sheath SPRT

Specifications
Temperature Range –200 °C to 661 °C (recommended annealing temperature 
665 °C) 
Nominal RTPW 25.5Ω (± 0.5Ω)
Current 1 mA
Resistance Ratio W(302.9146 K) ≥ 1.11807
W(234.3156 K) ≤ 0.844235
Sensitivity 0.1 Ω/ °C
Drift Rate < 0.008 °C/year (< 0.003 °C/year typical)
Repeatability < 1 mK
Self-heating at TPW < 0.001 °C under 1 mA current
Reproducibility ± 0.001 °C or better
RTPW Drift After Thermal Cycling < 0.001 °C
Diameter of Pt Sensor Wire 0.07 mm  (0.003 in)
Lead Wires Four sensor wires plus grounding wire
Protective Sheath Inconel
Diameter: 5.56 mm ± 0.13 mm (0.219 in ± 0.005 in)
Length: 482 mm (19 in)
Insulation Resistance > 100 MΩ at 661 °C
> 1000 MΩ at 20 °C

N/A

N/A

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