Neville Mitchell, managing director of Thermal Detection, examines issues relating to accurate temperature measurement with medical autoclaves.
When planning to upgrade or purchase an autoclave incorporating temperature probes with longer than average conductors, it is therefore essential to give this factor due consideration.
PT100 detectors are now available in two formats, the conventional type which uses a wire wound construction and the thin film type. This latter type is based on a ceramic substrate with a deposition of high purity platinum, laser-etched to give 100W at 0.0°C. This is then sealed within a glass adhesive.
Detectors are commercially available to several different tolerance levels, Class “B” and “A” are according to BS EN 60751:1996 and the remainder are based on fractions of the Class “B” tolerance (see table below).
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