Fluke Calibration

5615 Secondary Reference Temperature Standards

Secondary reference temperature standard designed to bridge the gap between the highest laboratory standards and industrial or second-tier lab locations

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$1,748.00 CAD
Normally ships in 1-2 Weeks

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For years, you’ve relied on our 5612, 5613, and 5614 Secondary Reference Probes. These field-durable, lab-accurate PRTs have been replaced by the 5615, which comes with a NVLAP accredited calibration.
The 5615-12 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 Ω 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 - 420°C. The 5615-6 is calibrated to 300°C.

• Affordable wide-range accuracy
• Calibrated accuracy +/- 0.012°C at 0°C
• Reference-grade platinum sensing element

Temperature Range 5615-12 and 5615-9:-200C - 420C
5615-6: -200C - 300C
Nominal Resistance at 0C 100 Ω +/- 0.10 Ω
Temperature Coefficient 0.0039250 Ω/Ω/C
Accuracy[1] +/- 0.024C at -200C
+/- 0.012C at 0C
+/- 0.035C at 420C
Short-Term Repeatability[2] +/- 0.009C at 0.010C
Drift[3] +/- 0.007C at 0.010C
Sensor Length 28 mm (1.1 in)
Sensor Location 6.9 mm +/- 3.3 mm from tip (0.27 in +/- 0.13 in)
Sheath Dimensions (L x dia) 5615-6: 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 Material Inconel 600
Minimum Insulation Resistance 1000 MΩ at 23C
Transition Junction Temperature Range[4] -50C - 200C
Transition Junction Dimensions 71 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 s (typical)
Self Heating (In 0C Bath) 50 mW/C
Lead-Wire Cable Type PTFE insulated with PTFE jacket, 22 AWG
Lead-Wire Length 183 cm (72 in or 6 ft)
Lead-Wire Temperature Range -50C - 200C
Calibration NVLAP-accredited calibration included
[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
Plastic probe carrying case for probes up to 228 mm (9 in) in length
Normally ships in 1-2 Weeks
$205.00 CAD