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  OKAZAKI Resistance Thermometer Sensor


Generally, electrical resistance of metal varies, depending on the temperature. Platinum in particular is more linear and has a higher temperature coefficient than most other metals. It is therefore suitable for temperature measurements. Platinum has excellent properties chemically and physically. Industrial high purity elements are readily obtained, which can be used over a long period of time as the resistance element for temperature measurements. The Characteristics are specified in JIS and other foreign standards; thus, it permits a highly accurate temperature measurement.





The resistance temperature detector is composed of a resistance element, internal conductors. insulated tube, protection tube, reinforcing tube, terminal head and other necessary mounting attachments.






1 . Resistance element


The resistance temperature uses our high-precision ceramic element (CERACOIL). provided with a stainless steel fin having excellent heat transfer, which is secured within the protection tube, providing excellent resistance to vibration.





2. Internal lead wire


The internal lead wire is used to connect a resistance element and terminal. The standard nickel lead wire is of the 3-wire type. but also available are 2-wire and 4-wire types.


3. Insulated tube


This insulated tube is used for internal lead wire insulation and short-circuit prevention: fiber glass sleeving is used for low and medium temperature. and a ceramic insulator for high temperature.


4. Protection tube


This protection tube is used to protect a resistance element, internal lead wires, etc. from ambient conditions, and is also fitted with mounting attachments and terminal heads, etc. for easy installation. This tube may be subjected to extremely severe operating conditions. It is there-fore necessary to select materials and shape suitable to the operating temperature, atmosphere, applications, etc.


5. Terminal head and terminal plate


This terminal head is used to connect the resistance temperature detector with external lead wire. In addition to the standard weather-proof E type (Aluminum diecast), also available are other types of materials and shapes suitable for specific applications.


6. Mounting attachment


This mounting attachment is provided for a protection tube to install the resistance temperature detector to a measuring point. For details, see Standard Parts Catalog.


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CATALOG

MANUAL

RTD_RTS_SPEC.pdf

RTD_E5.pdf