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Temperature Calculators

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Secondary PRT with Calibration Options - 5608 and 5609

Platinum Resistance Thermometers for precision temperature calibration.

Features

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

Specifications 

Temperature range  5608: –200 °C to 500 °C
5609: –200 °C to 670 °C 
Nominal resistance at 0.01 °C  100 W ±  0.5 W 
Temperature coefficient  0.0039250 W/W/°C 
Relative Accuracy[1]  ± 0.007 °C at –200 °C
± 0.008 °C at 0 °C
± 0.020 °C at 420 °C
± 0.027 °C at 660 °C 
Short-term repeatability[2]  ±  0.007 °C at 0.010 °C
±  0.013 °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 MW at 23 °C, 20 MW at 500 °C
5609: 500 MW at 23 °C, 10 MW at 670 °C 
Transition junction temperature range[4]  –50 ºC to 200 °C 
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 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. 

[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 

Calibration Uncertainty for optional NVLAP-accredited calibration 

Temperature
 
Expanded
Uncertainty (k=2)
 
–200 °C 
0.025 °C 
–100 °C 
0.025 °C 
–40 °C 
0.025 °C 
0 °C 
0.025 °C 
156 °C 
0.025 °C 
230 °C 
0.030 °C 
420 °C 
0.045 °C 
660 °C 
0.050 °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 200348-0 

If you want a very stable thermometer from –200 °C to 670 °C and are particular about the calibration, then look no further than our 5609 Secondary Reference PRT. Its short-term stability at the triple point of water is only ± 7 mK and its one-quarter inch (6.23mm) diameter 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 to 500 °C with only 80mm (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. 

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. 

These probes come with a certificate of compliance to ensure the meet their specifications. If you’d like, you can also 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 Hart thermometer. If you order your probe with an INFO-CON connector, we’ll program the coefficients directly into your connector, which loads the coefficients for you when you plug it into our 1522 Handheld Thermometer.

Call today for your free quote.

Ordering Information

5608-9-X Secondary Reference PRT, 9 in x 1/8 in, –200 to 500 °C
5608-12-X Secondary Reference PRT, 12 in x 1/8 in, –200 to 500 °C
5609-12-X Secondary Reference PRT, 12 in x 1/4 in, –200 to 670 °C
5609-15-X Secondary Reference PRT, 15 in x 1/4 in, –200 to 670 °C
5609-20-X Secondary Reference PRT, 20 in x 1/4 in, –200 to 670 °C
5609-300-X Secondary Reference PRT, 300 mm x 6 mm, –200 to 670 °C
5609-400-X Secondary Reference PRT, 400 mm x 6 mm, –200 to 670 °C
5609-500-X Secondary Reference PRT, 500 mm x 6 mm, –200 to 670 °C
5609-9BND Secondary Reference PRT, 15 in x 1/4 in, 9 in bend,
–200 °C to 670 °C, (optional calibration: 1924-4-7 only)
1922-4-R PRT Calibration, –200 °C to 500 °C, NVLAP Accredited
1923-4-7 PRT Calibration, –200 °C to 660 °C, NVLAP Accredited
1924-4-7 PRT Calibration, –200 °C to 660 °C, NVLAP Accredited
1930 Precision Digital Thermometer System Calibration by Comparison, NVLAP-accredited, lab code 200348-0
2601 Plastic PRT Case, for models ending -9, -12, and -300
2609 Plastic PRT Case, for models ending -15, -20, -400, and -500
X = termination. Specify “A” (INFO-CON for 914X), “B” (bare wire), “D” (5-pin DIN for Tweener Thermometers), “G” (gold pins), “I” (INFO-CON for 1521 or 1522), “J” (banana plugs), “L” (mini spade lugs), “M” (mini banana plugs),  “P” (INFO-CON for 1523 or 1524), or “S” (spade lugs). 

Downloads

Right click the appropriate link below and “Save Target As ...” to download this data sheet or User's Guide in Acrobat (.pdf)  format.

5608-09 Data Sheet
5608-09 User's Guide

 

 

 

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