Isotech Gold, Platinum Specifications

37

Isotech North America - www.isotechna.com - ph: [phone] - email: [e-mail] - SOLUTIONS FOR PRIMARY & SECONDARY LABORATORIES

|

0 to 1000°C

g

Pure Metal Construction

g

Best Homogeneity

g

Economic Attention to HTSPRTs

Since 1995 Isotech have been producing various designs
of special Pt/Au, Pt/Pd, Pd/Au thermocouples for
researchers. From our experience we can now offer the
most popular of these, the Pt/Au thermocouple in a
standard form.

All wires are 99.999+% pure and are fully annealed
according to the recommendations of McLaren.
Assembly also follows his prescriptions which have never
been bettered.

After final assembly and annealing the Pt/Au thermocouples
will conform to IEC 26460, Edition 1 2008-07.

For the smallest uncertainties we calibrate the thermocouple
at the Zinc, Aluminium and Silver Fixed Points.

Thermocouple

Platinum/Gold

Economic alternative to HTSPRTs

Construction allows for differential expansion

Accuracy of ±0.05°C over the whole temperature range

We achieve these results because:

1. All materials are selected for their purity and high
quality.

2. All parts are pre-aged and annealed prior to
construction.

3. The construction allows for differential expansion of
the Gold and the Platinum by having a coil of platinum
bridge the two thermo elements at their measuring
junction.

4. There are no joins between the measuring and
reference junctions.

5. The reference junction is also researched and we use
thermally pure copper wire of selected diameter which
has been pre-annealed in inert gas to maintain the
accuracy of the measuring junction.

6. The reference junction needs to be placed in an
accurate reference system such as a Water Triple Point
Cell or an Isotech Zeref.

7. An article describing in detail the construction,
handling and operation of the thermocouple is
provided free with each unit.

Temperature Range 0°C to 1000°C

Sheath materials
Measuring Junction Quartz
Reference Junction Stainless Steel

Thermo-element Purities
Platinum 99.999% Pure
Gold 99.999% Pure

Calibration Zinc 0.05°C
Uncertainties Aluminium 0.05°C
Silver 0.05°C

0-1000°C 0.10°C
Including uncertainty of
interpolation / extraction

Dimensions Refer to drawing

Carrying Case Included as standard

How to order

Model type: Pt/Au Thermocouple

Including emf vs. temperature traceable calibration
certificate and carrying case.

UKAS Calibration optional.