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 These field-durable, lab-accurate PRTs have been replaced by the 5615, which comes with a NVLAP accredited calibration.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:-200°C - 420°C
5615-6: -200°C - 300°C
|Nominal Resistance at 0°C||100 Ω +/- 0.10 Ω|
|Temperature Coefficient||0.0039250 Ω/Ω/°C|
|Accuracy||+/- 0.024°C at -200°C
+/- 0.012°C at 0°C
+/- 0.035°C at 420°C
|Short-Term Repeatability||+/- 0.009°C at 0.010°C|
|Drift||+/- 0.007°C at 0.010°C|
|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 23°C|
|Transition Junction Temperature Range||-50°C - 200°C|
|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||9 s (typical)|
|Self Heating (In 0°C 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||-50°C - 200°C|
|Calibration||NVLAP-accredited calibration included|
|Includes calibration and 100 hr drift (k=2)|
|Three thermal cycles from min to max temp, includes hysteresis, 95 % confidence (k=2)|
|After 100 hrs at max temp, 95 % confidence (k=2)|
|Temperatures outside this range will cause irreparable damage. For best performance, transition junction should not be too hot to touch.|
|Per ASTM E 644|