Name: Fluke 5608 Secondary PRT with Calibration Options, 100 OHM (1/8 X 9 INCH)
SKU: 515043

Product Details ＋

(item no. 3057129, 3057134, 3057141, 3057152, 3057165, 3057176, 3057183, 3057190, 3376765, 4352001)

PRODUCT OVERVIEW: 5608 AND 5609

The 5608 comes with a one-eighth inch (3.18 mm) diameter sheath in lengths of 9 inches or 12 inches. The 5609 comes with a one-quarter inch (6.35 mm) diameter sheath in lengths of 12 inches, 15 inches, and 20 inches; or with a 6 mm diameter in lengths of 300 mm, 400 mm, or 500 mm.

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.

Both of these 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.

As standard, each probe includes its resistance value at the triple point of water. If calibration is desired, you can order a NVLAP-accredited calibration from our laboratory; lab code 200348-0. On the report of calibration, you’ll get the test data and the ITS90 calibration coefficients that you can easily input into any Fluke Calibration thermometer. If you order your probe with a smart connector.

FEATURES

5608: –200 °C to 500 °C (80 mm minimum immersion)
5609: –200 °C to 670 °C (100 mm minimum immersion)
± 0.01 short-term stability
Calibration not included, NVLAP-accredited calibration optional, lab code 200348-0
Dry-well reference with 90 ° bend

SPECIFICATIONS: 5608 AND 5609

Specifications

Temperature range

5608:	–200 °C to 500 °C
5609:	–200 °C to 670 °C

Nominal resistance at 0.01 °C

100 Ω ± 0.5 Ω

Temperature Coefficient

0.0039250 Ω/Ω/°C

Accuracy ^[1]

See footnote

Short-term repeatability^[2]

	± 0.01 °C at 0.010 °C
	± 0.02 °C at max temp

Drift^[3]

	± 0.01 °C at 0.010 °C
	± 0.02 °C at max temp

Hysteresis

± 0.01 °C 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 23 °C, 20 MΩ at 500 °C
	5609: 500 MΩ at 23 °C, 10 MΩ at 670 °C

Transition junction dimensions

71 mm x 12.5 mm (2.8 in x 0.49 in)

Minimum immersion length^[4] (<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 0 °C bath)

5608:	75 mW/°C
5609:	50 mW/°C

Lead-wire cable type

Teflon,™ 24 AWG

Lead-wire length

1.8 m (6 ft)

Lead-wire temperature range

–50 °C to 250 °C

Calibration

Calibration not included; NVLAP-accredited calibration optional, lab code 200348-0. Please see calibration uncertainty table and its explanation of changeable uncertainties.