Isotech 465 Three Zone High Temperature Furnace
- Temperature Range 250°C to 1200°C
- Uncertainty <1 to 2mK (with cells)
- Widest Operating Range
- Three Zone Control
- Long Plateau Length
The Isotech 465 Three‑Zone High Temperature Furnace is designed for the realization and maintenance of ITS‑90 high‑temperature fixed‑point cells. With an operating range of 250 °C to 1200 °C and a sophisticated three‑zone design, the furnace provides a highly stable and versatile environment for realizing fixed points such as Zinc, Aluminium, Silver, Gold and Copper.
For laboratories seeking an alternative to heatpipe technology with extended temperature capability, the 465 offers exceptional stability, safety and reproducibility.
Three‑zone design for optimal uniformity
Heatpipe furnaces offer excellent stability but are limited by the working fluid inside the pipe. The 465 overcomes this limitation by using top and bottom guard heaters to minimize temperature gradients and create a perfectly controlled thermal profile.
The three zones together form a stable region in which fixed‑point cells can be melted and frozen with long, well‑defined plateaux.
Suitable for high‑temperature fixed points
The 465 supports the realization of:
- > Zinc (419.527 °C)
- > Aluminium (660.323 °C)
- > Silver (961.78 °C)
- > Gold (1064.18 °C)
- > Copper (1084.62 °C)
Because high‑temperature thermometers are easily contaminated by metallic vapours, the calibration volume is designed entirely metal‑free, ensuring clean operation and long‑term sensor stability.
Ceramic equalizing block for comparison calibrations
An optional ceramic equalising block is available, consisting of:
- > a closed‑end ceramic tube
- > alumina sensor tubes
- > alumina powder as equalising medium
This configuration enables precise comparison calibrations and annealing procedures.
Modern control and enhanced ergonomics
The 465 incorporates the latest Isotech furnace design features, including:
- > a crystal‑clear colour display
- > USB and Ethernet connectivity
- > programmable melt and freeze cycles
- > storage for multiple programs
- > an integrated SPRT stand
- > cable guides and accessory pods
The furnace is fully self‑contained and built for demanding laboratory environments.
The Isotech 465 Three‑Zone High Temperature Furnace provides a wide‑range, highly stable and fully programmable solution for fixed‑point realization up to 1200 °C. With its three‑zone design, modern control features and contamination‑free calibration volume, the 465 is an essential instrument for laboratories operating at the highest levels of temperature metrology.
