10,000
ohm Thermal-Ribbon(TM) RTD introduced
A new surface-mount style
temperature sensor packs a 10,000 ohm platinum RTD into
a flat package measuring only 5 x 15 mm (0.2" x 0.6"),
and less than 2 mm (0.08") thick over the sensing area.
The large base resistance, compared to more common 100
and 1,000 ohm versions, gives this new RTD a sensitivity
of nearly 40 ohms per degree C. That allows precise 2-wire
measurements over narrow temperature intervals using simple
input circuits. Yet, at the same time, the RTD follows
the well-defined platinum curve over the extended range
of -50 to 200°C (-58 to 392°F).
Medical instrumentation
is one application that will benefit from the 10,000 ohm
RTD. This industry, needing to accurately measure within
a few degrees of 37°C (98.6°F), has traditionally
selected thermistors for their dramatic sensitivity. The
new RTD's, however, also provide excellent resolution
plus the additional advantages of RTD linearity, stability,
standardization, and wide temperature range.
The new RTD meets the
tolerance requirements of IEC 751, Class B. Fully encapsulated
in Kapton® polyimide with Teflon leadwires, they will
withstand harsh environments, caustic chemicals, and rough
handling. The flat laminated design makes installation
as simple as taping or cementing the RTD to the surface
to be sensed.
