3 Zone Control System for Minimal Thermal Gradients for Half the Price of Heat Pipes.
200°C to 1200°C (2192°F)Ideal for Creating and Maintaining Fixed points cells, Indium to Copper
- Wide Temperature Range 200°C to 1200°C
- Covers ITS-90 Fixed Points from Tin to Copper in one furnace
- Long plateaus
- Self-Tuning controller optimizes each Fixed Points performance
- 3 zones controlled to compensate for end loss to give a perfect profile
The recent addition to our long-established range of metrology furnaces offers an alternative for those who prefer 3-Zone
furnaces to Heat-Pipe technology.
The 3 Zones create a controlled volume of constant temperature within the furnace in which High-Temperature Fixed
Points such as Aluminum, Silver and Copper can be frozen and melted.
Because High-Temperature thermometers can be easily contaminated by metallic vapors, great care has been taken to
eliminate the use of metals throughout the calibration volume.
The cell holder is made of Alumina.
A ceramic equalizing block is available comprising a closed ended tube, Alumina tubes to house the sensors being
compared, and Alumina powder to act as an equalizing media.
The sensor for the main controller is a mineral insulated type N thermocouple which has been found to be more stable
than the type R thermocouple.
In addition two slave controllers compensate for any temperature gradient along the furnace by eliminating any
temperature difference that they sense.
Connections are provided for a water supply of 0.5 to 1 liter per minute to cool the top of the apparatus. Water supply
and waste connections may be ordinary an garden hose. Use without cooling is not recommended above 700°C.
This 3-Zone Furnace can be used for the realizations of the Tin, Zinc, Aluminum, Silver, Gold and Copper points, or with
an optional equalizing block used for annealing or comparison calibration.
200°C
465 Product Spec Sheet
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