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Temperature Calculators

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Visit other Fluke companies for calibration equipment and services in electrical, power, pressure, flow, RF, and more.

Link to Fluke Calibration for electrical and power calibration

Fluke

 

Link to DH Instruments for pressure and flow calibration

DH Instruments

  

5623B Precision RTD Freezer Probe 

5623 Precision RTD probe for low temperature measurement applications.

  • Fully immersible probe assembly to –100°C 
  • NVLAP-accredited calibration, lab code 200706-0, and ITS-90 coefficients included 
  • Accuracy to ±0.05°C over the full range 

Specifications 

Resistance  Nominal 100 W(± 0.1 W) 
Temperature Coefficient  0.003925  W/W/°C nominal 
Temperature Range  –100 °C to 156 °C 
Transition Temperature  –100 °C to 156 °C 
Drift Rate  ± 0.01 °C per year maximum at 0 °C, when used periodically at max temperature 
Sheath Material  Inconel™ 600 
Leads  Teflon™-insulated, silver-plated stranded copper, 22 AWG. 
Termination  Specify. See ordering information. 
Calibration  Includes manufacturer’s NVLAP-accredited, lab code 200706-0, calibration and table with R vs. T values in 1 °C increments from –80 °C to 156 °C. ITS-90 coefficients included. 
Calibrated Accuracy† (k=2)  ± 0.05 °C over the full range 
Cable Length  6.1 meters (20 ft) 
Size  6.35 mm (0.25 in) dia. x 152 mm (6 in) 
†Includes calibration uncertainty and drift. 

 

If you need a precision measurement at low temperatures, do not look any further than Hart Scientific. 

The 5623B, precision “freezer probe,” is specially sealed from the sensing element to the end of the probe cable, preventing ingress of moisture when exposed to temperatures as low as –100 °C. The entire assembly withstands temperatures over its full range (–100 °C to 156 °C), which is ideal for verification of freezers or autoclaves where a thermo-well isn’t available. The 5623B assembly can be fully immersed in fluids when the application may require use in a liquid bath. The 5623B is available in a 6.35 mm (0.25 in) dia. × 125 mm (6 in) long Inconel™ sheath. With accuracy (that includes calibration uncertainty and short-term drift) of ± 0.05 °C over its full range, the 5623B is just right as a secondary standard for calibration of other process sensors. 

Most Hart Scientific readouts make an excellent companion for the 5623B. We recommend the use of the 1523, 1524, 1502A, 1529, or 1560 thermometer readouts. 

With each 5623B, you receive a full NVLAP-accredited calibration report. This report includes test data and ITS-90 calibration coefficients to enter into your Hart Scientific thermometer readout. 

Ordering Information 

5623B-6-X  Freezer Probe, RTD 1/4" dia. x 6", –100 to 156°C 
2601  Probe Carrying Case 
X = termination. Specify “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 one of the following links and “Save Target As ...” to download the catalog pages/data sheet or a product User's Guide in Acrobat (.pdf)  format.

Catalog page(s)/data sheet
5623 User's Guide - File size is 96 Kb.

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