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 penod of time as the resistance element for temperature measurements．The Characteristics are specified in IEC and other foreign standards; Thus, it permits a highly accurate temperature measurement．

Configuration

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．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, intimal 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 therefore 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 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．