Fluke Calibration

5608 / 5609 Secondary Reference Platinum Reference Therm...

Stable and reliable dry-well reference probe from -200C - 670C

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$1,023.00 CAD
Normally ships in 1-2 Weeks

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When looking for improved response time and reduced stem effect in shallow immersion, look for small diameter probes, because the measurement error called stem effect is caused by the diameter of the stem rather than the length of the stem.  The 5608 and 5609 probes have Inconel™ sheaths and are made using a special manufacturing process, giving them great precision over a wide temperature range. The sensors for these probes are reference-grade platinum and feature four-wire connections with less noisy measurements than two-wire counterparts.

The 5609 PRT is a very stable thermometer from -200°C - 670°C. It has a short-term stability at the triple point of water of +/- 7 mK, and lets you get accurate measurements in only 100 mm of immersion.

The 5608 is also a +/- 7 mK probe at the triple point of water, but its one-eighth inch (3.18 mm) diameter gets you accurate measurements from -200°C - 500 °C with only 80 mm (3.1 in) of immersion.

With multiple sheath length options on both of these probes, you can find the dimensions that are just right for your specific application

• 5608: –200°C - 500°C (80 mm minimum immersion)
• 5609: –200°C - 670°C (100 mm minimum immersion)
• 5608: 1/8 in (3.18 mm) diameter sheath in lengths of 9 in or 12 in
• 5609: 1/4 in (6.35 mm) diameter sheath in lengths of 12 in, 15 in, and 20 in; or 6 mm diameter in lengths of 300 mm, 400 mm, or 500 mm.
• Dry-well reference with 90° bend

Temperature Range 5608: 200C - 500C
5609: 200C - 670C
Nominal Resistance at 0.01C 100 Ω +/- 0.5 Ω
Temperature Coefficient 0.0039250 Ω/Ω/C
Relative Accuracy[1] +/- 0.007C at 200C
+/- 0.008C at 0C
+/- 0.020C at 420C
+/- 0.027C at 660C
Short-Term Repeatability[2] +/- 0.007C at 0.010C
+/- 0.013C at max temp
Drift[3] +/- 0.01C at 0.010C
+/- 0.02C at max temp
Hysteresis +/- 0.01C maximum
Sensor Length 30 mm +/- 5 mm (1.2 in +/- 0.2 in)
Sensor Location 3 mm +/- 1 mm from tip (0.1 in +/- 0.1 in)
Sheath Material Inconel 600
Minimum Insulation Resistance 5608: 500 MΩ at 23C, 20 MΩ at 500C
5609: 500 MΩ at 23C, 10 MΩ at 670C
Transition Junction Temperature Range[4] 50C - 200C
Transition Junction Dimensions 71 mm x 12.5 mm (2.8 in x 0.49 in)
Minimum Immersion Length[5] (< 5 mK error) 5608: 80 mm (3.1 in)
5609: 100 mm (3.9 in)
Maximum Immersion Length 305 mm (12 in)
Response Time[5] 5608: 9 seconds typical
5609: 12 seconds typical
Self Heating (In 0C Bath) 5608: 75 mW/C
5609: 50 mW/C
Lead-Wire Cable Type PTFE 24 AWG
Lead-Wire Length 1.8 m (6 ft)
Lead-Wire Temperature Range 50C - 250C
Calibration Calibration not included
[1]Includes short-term repeatability and 100 hr drift. Calibration will add additional uncertainties
[2]Three thermal cycles from min to max temp, includes hysteresis, 95 % confidence (k=2)
[3]After 100 hours 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
Item
Description
Availability
Price
Plastic probe carrying case for probes up to 228 mm (9 in) in length
Normally ships in 1-2 Weeks
$205.00 CAD
Plastic probe carrying case for probes 635 mm (25 in) in length
Normally ships in 1-2 Weeks
$301.00 CAD