5615 Secondary Reference Temperature Standards

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  • 5615 Secondary Reference Temperature Standards 1500x1000
  • 5615 Secondary Reference Temperature Standards
  • 5615 Secondary Reference Temperature Standards

Key features

  • Inconel™ 600 sheath that’s 305 mm (12 in) long and 6.35 mm (0.250 in) in diameter
  • Calibrated accuracy of ± 0.012 °C at 0 °C.
  • Reference-grade platinum sensing element.
  • NVLAP-accredited calibration, lab code 200706-0.
  • Durable sensors, ideal in the factory, field, or lab.
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Product overview: 5615 Secondary Reference Temperature Standards

The 5615-12 (formerly Hart Scientific) is a Platinum Resistance Thermometer (PRT) with an Inconel™ 600 sheath that’s 305 mm (12 in) long and 6.35 mm (0.250 in) in diameter. It is a secondary reference temperature standard designed to bridge the gap between the highest laboratory standards and industrial or second-tier lab locations. It has accuracy of ± 0.012 °C at 0.01 °C.

The element is constructed of reference-grade platinum wire (99.999 % pure) for excellent stability. The wire is wound in a coil and placed in a mandrel where it’s uniformly supported in a manner that virtually eliminates hysteresis. The electrical configuration is a four-wire current-potential hookup that eliminate the effects of lead-wire resistance.

These Inconel™-sheathed probes have a fully supported sensing element, making them more durable than SPRTs. The element is protected in an ultrahigh-purity ceramic case with a hermetic glass seal to improve output stability by locking out moisture and contaminants.

This probe comes calibrated with ITS-90 coefficients, making it compatible with many excellent readout devices, including Fluke Calibration’s 1529 Chub-E4, 1560 Black Stack, and 1502A Tweener. It bridges the gap between a 100-ohm industrial RTD and an SPRT.

For those needing faster thermal response, or where diameter and immersion depth are problems, order the 5615-9 or 5615-6. These probes are excellent reference probes for comparison calibrations in a Fluke Calibration dry-well. The sheaths of the 5615-6 and 5615-9 are 4.76 mm (0.188 in) in diameter.

A printout of sensor resistance is provided in 1 °C increments for each probe. The 5615-9 and 5615-12 are calibrated from –196 °C to 420 °C. The 5615-6 is calibrated to 300 °C.

We’ve tested many of the probes on the market. We’ve used them in our manufacturing facility and tested them in the lab, and this is an excellent secondary standards PRT. Other instruments on the market are priced much higher, have lower stability, or are of lower quality.

Remember, these are reliable instruments and each probe comes with its own individual NVLAP-accredited calibration, lab code 200706-0.

Specifications: 5615 Secondary Reference Temperature Standards

Specifications
Temperature range
 		5615-12 and 5615-9: –200 °C to 420 °C
5615-6: –200 °C to 300 °C
Nominal resistance at 0 °C100 Ω ± 0.10 Ω
Temperature coefficient0.0039250 Ω/Ω/°C
Accuracy[1]
 
 		± 0.024 °C at –200 °C
± 0.012 °C at 0 °C
± 0.035 °C at 420 °CC
Short-term repeatability[2]± 0.009 °C at 0.010 °C
Drift[3]± 0.007 °C at 0.010 °C
Sensor length28 mm (1.1 in)
Sensor location6.9 mm ± 3.3 mm from tip (0.27 in ± 0.13 in)
Sheath dimensions5615-6: 152 mm x 4.76 mm (6.0 in x 0.188 in)
5615-9: 229 mm x 4.76 mm (9.0 in x 0.188 in)
5615-12: 305 mm x 6.35 mm (12.0 in x 0.250 in)
Sheath diameter tolerance± 0.127 mm (± 0.005 in)
Sheath materialInconel™ 600
Minimum insulation resistance1000 MΩ at 23 °C
Transition junction temperature range[4]–50 °C to 200 °C
 
Transition junction dimensions71 mm x 13 mm dia (2.8 in x 0.5 in)
Maximum immersion length
 
 		5615-6: 102 mm (4 in)
5615-9: 178 mm (7 in)
5615-12: 254 mm (10 in)
Response time[5]9 seconds typical
Self heating (in 0 °C bath)50 mW/°C
Lead-wire cable typePTFE insulated with PTFE jacket, 22 AWG
Lead-wire length183 cm (72 in or 6 ft)
Lead-wire temperature range–50 °C to 200 °C
Calibration
 
 		NVLAP-accredited calibration included, lab code 200706-0. Please see calibration uncertainty table and its explanation of changeable uncertainties.
[1] Includes calibration and 100 hr drift (k=2)

[2] Three thermal cycles from min to max temp, includes hysteresis, 95 % confidence (k=2)

[3] After 100 hrs at max temp, 95 % confidence (k=2)

[4] Temperatures outside this range will cause irreparable damage. For best performance, transition junction should not be too hot to touch.

[5] Per ASTM E 644
NVLAP† Calibration Uncertainty
TemperatureExpanded Uncertainty (k=2)
–196 °C0.024 °C
–38 °C0.011 °C
0 °C0.010 °C
200 °C0.018 °C
420 °C‡0.029 °C

Note: Calibration uncertainties depend on the uncertainties of the lab performing the calibration. Subsequent calibrations of this probe performed with different processes, at different facilities, or with changed uncertainty statements may state different uncertainties. †Lab code 200706-0 ‡5615-6 excluded

Models: 5615 Secondary Reference Temperature Standards

5615 Secondary Reference Temperature Standards

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5615-6-X
Secondary Standard PRT, 4.76 mm x 152 mm (0.188 x 6.0 in), –200 °C to 300 °C, lead wire (cable) 6 ft

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(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), “J" (banana plugs), “L" (mini spade lugs), “M" (mini banana plugs), “P" (INFO-CON for 1523 or 1524), or “S" (spade lugs).
5615-9-X
Secondary Standard PRT, 4.76 mm x 229 mm (0.188 x 9.0 in), –200 °C to 420 °C,  lead wire (cable) 6 ft

Buy it
(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), “J" (banana plugs), “L" (mini spade lugs), “M" (mini banana plugs), “P" (INFO-CON for 1523 or 1524), or “S" (spade lugs).
5615-12-X
Secondary Standard PRT, 6.35 mm x 305 mm (0.250 x 12.0 in), –200 °C to 420°C,lead wire (cable) 6 ft

Buy it
(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), “J" (banana plugs), “L" (mini spade lugs), “M" (mini banana plugs), “P" (INFO-CON for 1523 or 1524), or “S" (spade lugs).
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