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Hart Scientific 5650 - Type S Thermocouple Standards (0°C to 1450°C)

Hart Scientific 5650  - Type S Thermocouple Standards (0°C to 1450°C)

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  • Designed by Hart’s primary standards design team
  • Two sizes available, with or without reference junction
  • Uncalibrated accuracy is the greater of ±0.6°C or ±0.1% of reading
  • Individual fixed-point calibration available

Made from the finest platinum and platinum-rhodium alloy, the Type R and Type S Thermocouples cover a temperature range of 0 °C to 1450 °C with uncertainties as good as 0.15 °C over most of that range. With four different models for each type, we have the thermocouple to fit your application. 

The measuring junction of both the 5649 and the 5650 is encased in a 0.25-inch (6.35 mm) alumina sheath that can be ordered in lengths of 20 or 25 inches (50.8 or 63.5 cm) to fit the specific requirements of your application. A reference, or “cold,” junction may also be ordered. The reference junction uses a stainless steel sheath and is 8.25 inches long (21 cm) by 0.188 inches in diameter (4.8 mm). The thin diameter minimizes the immersion depth needed, but the extra length ensures you can get all the immersion you like. 

Special tin-plated, solid-copper connecting wires with ultra-low EMF properties are used to help retain the integrity of your measurement junction where the probe attaches to your micro voltmeter or Hart Black Stack. 

Each probe comes from a spool of wire that has been certified for use with ASTM E-230-03 special tolerances (the greater of ±0.6 °C or ±0.1% of reading over the range 0 °C to 1450 °C). If you need greater accuracy, order an individual fixed-point calibration to reduce uncertainties to ±0.15 °C up to 962 °C, increasing linearly to ±2.0 °C at 1450 °C.

The probe assembly can be easily disassembled for performing your own bare-wire calibrations. 

Specifications

Range

0 °C to 1450 °C

Type

Platinum/13 %Rhodium vs. platinum (type R)
Platinum/10 %Rhodium vs. platinum (type S)

Accuracy

Wire is certified for use with ASTM E-230-03 special tolerances (the greater of ±0.6°C or ±0.1% of reading over the range 0°C to 1450°C). An optional fixed-point calibration is available.

Fixed-point Calibration Uncertainty (k=2)

±0.15°C up to 962 °C, increasing linearly to ±2.0°C at 1450°C

Hot Junction Sheath Dimensions

6.35 mm (0.25 in) diameter; see Ordering Information for lengths

Reference Junction Sheath Dimensions

4.8 mm dia. x 210 mm long
(0.188 x 8.25 in)

Long-Term Stability

±0.5 °C to 1100 °C
±2.0 °C to 1450 °C
(over one year depending on usage)

Short-Term Stabilities

±0.2 °C to 1100 °C
±0.6 °C to 1450 °C

Immersion

At least 152 mm (6 in) recommended

Protective Case

Model 2609 case included

Weight

1 kg (2 lb.)

Does not include short-term stability or long-term stability

Ordering Information

5649-20-X

Type R TC, 508 mm (20 in)

5649-20CX

Type R TC, 508 mm (20 in), with reference junction

5649-25-X

Type R TC, 635 mm (25 in)

5649-25CX

Type R TC, 635 mm (25 in), with reference junction

5650-20-X

Type S TC, 508 mm (20 in)

5650-20CX

Type S TC, 508 mm (20 in), with reference junction

5650-25-X

Type S TC, 635 mm (25 in)

5650-25CX

Type S TC, 635 mm (25 in), with reference junction

X = termination. Specify “B” (bare wire), “W” (generic copper-to-copper TC connector), or “R” (standard Type R/S TC connector). Models with reference junctions should not specify “R” and models without reference junctions should not specify “W”.

1918-B

Four-point calibration by fixed point (Sn, Zn, AI, Ag).
Extrapolated to 1450 °C.

2609

Spare Case (for 635 mm [25 in] long TC)





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