Isotech 17703 Medium Temperature Furnace
- Wide Operating Range
- Three Zone Control
- Long Plateau Length
- Temperature Range 50°C to 700°C
- Uncertainty <1mK (with cells)
The Isotech 17703 Medium Temperature Furnace is designed to realize and maintain the freeze plateaux of Indium (156.5985 °C), Tin (231.928 °C), Zinc (419.527 °C) and Aluminium (660.323 °C). With a wide operating range of 50 °C to 700 °C and a sophisticated three‑zone design, the furnace fully meets the requirements for optimal realization of ITS‑90 defining fixed points.
Three‑zone design for superior uniformity
While heatpipe furnaces offer excellent stability, their operating range is limited by the working fluid. The 17703 overcomes this limitation by using top and bottom guard heaters to minimize temperature gradients and create a highly uniform thermal environment.
The furnace core is machined from aluminium bronze, chosen for its excellent thermal conductivity and low axial gradients.
Suitable for multiple fixed‑point cells
The 17703 is ideal for laboratories working with Indium, Tin, Zinc and Aluminium fixed‑point cells. With a combined uncertainty of < 1 mK (with cells), the furnace is suitable for both primary and secondary temperature metrology.
Modern control and enhanced ergonomics
The updated Isotech furnace range incorporates extensive user feedback and includes:
- > Colour display
- > USB and Ethernet connectivity
- > Programmable melt and freeze cycles
- > Storage for multiple programs
- > An integrated SPRT stand
These features make the furnace suitable for both manual and automated fixed‑point procedures.
Safety and reliability
The furnace includes both active and passive safety circuits, ensuring safe operation even during extended high‑temperature cycles. An aluminium bronze equalising block is available for comparison calibrations.
The Isotech 17703 Medium Temperature Furnace provides a wide‑range, highly stable and fully programmable solution for realizing fixed‑point cells up to 700 °C. With its three‑zone design, modern control features and excellent thermal uniformity, the 17703 is an essential instrument for laboratories operating at the highest levels of temperature metrology.
