Nickel Temperature Sensors0 pages

Nickel Temperature Sensors

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General Information
In many sectors, temperature measurement is one of the most important physically defined parameter to
determine product quality, security and reliability. Temperature sensors are produced with different technologies
to fit specific application requirements. To this end, IST has concentrated the development, manufacturing
processes and materials to produce high-end thin-film temperature sensors. This know-how, partially derived from
the semiconductor industry, allows IST to manufacture sensors in very small dimensions. Thin-film temperature
sensors exhibit a very short response time due to their low thermal mass. The technologies and processes of IST
thin-film sensors combines the positive attributes of traditional wire-wound platinum sensors - accuracy, long-term
stability, repeatability and interchangeability within a wide temperature range. The advantages of thin-film massproduction creates an optimal price/performance ratio.

Sensor Construction
The temperature sensor consists of a photolithographically structured high-purity platinum meander on a ceramic
substrate. The resistivity is laser-trimmed and precisely adjusted to the final value. The resistive structure is
covered with a glass passivation layer protecting the sensor against mechanical and chemical damages. The
welded leadwires are covered with an additional fixation layer.

Typical Features
– Fast response time
– Excellent long-term stability
– Low self-heating
– Easy interchangeability

– Small dimensions
– Simple linearization
– Vibration and temperature shock resistant

Response Time
The change in ohmic value after 1000 hrs is less than 0.1% at maximum operating temperatures.

Long-Term Stability
The change in ohmic value after 1,000 hrs at maximum operating temperature amounts to less than 0.1%.

Nominal Value and Temperature Coefficent
The nominal value of the sensor is the defined value of the sensor resistance at 0° C. The temperature coefficient
(TCR) is defined as
=

R100 - R0
100 · R0

-1

-1

[K ] according to the DIN 43760 (formerly) numerical value of 0.00618 K .

Generally, the value is defined in ppm/K.
This example defines 6180ppm/K.