Wise R Series - Design; Structure; Basic Type; Spring Loaded Type

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C-QIM-2731-T01_EN_Rev.2
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4. Design
4.1 Structure
4.1.1 Basic type
Products generally come in two types: explosion proof and general. Explosion proof products are
resistance against pressure and explosion. The enclosure is designed to withstand the pressure of
explosive gases or vapors exploding inside, and to prevent combustion due to explosive gases or
vapors outside the enclosure through joints and lead-ins. The basic type of the products are comprised
of a detector unit and process connection unit welded together. An appropriate process connection
unit may be selected and used depending on the installation environment. The temperature sensor
may be installed by inserting directly, or together with a thermowell appropriate to the use environment.
4.1.2 Spring loaded type
In the spring-loaded type, a spring is installed inside the head, and the load from the spring allows the
sensor to maintain maximum contact. Detection response time is faster compared to the basic type.
Spring-loaded type sensors are not sealed to allow for movement of the detector unit, and are typically
installed together with a thermowell appropriate to the use environment. When installing the
temperature sensor directly, contact between the process fluid and temperature sensor should be
avoided, or a sealed type sensor should be used instead.