RESIOPAK®Mineral Insulated Resistance Thermometer Sensor

Principle of Platinum Resistance Thermometer Sensors

Generally, the electrical resistance of metal changes with the temperature. Especially, the electrical resistance of platinum linearly changes with temperature, and its temperature coefficient is large; therefore, platinum is suitable for temperature measurement. In addition, platinum has excellent characteristics chemically and physically and it is easy to get platinum of industry high purity; therefore, we can use platinum as a resistance element for long term stable temperature measurement. The characteristics have been standardized in JIS and other overseas standards; therefore, temperature measurement with a high accuracy is available.

Features

RESIOPAK has the following features in comparison to conventional resistance thermometer sensors.

• １．Wider Application Range

  Since the outer diameter is small, you can measure the temperature of small targets for a wide temperature range of -200 to +500℃.

• ２．High Response

  Since the tube is thin and the heat capacity is small, RESIOPAK is sensitive to minor temperature changes and responds quickly.

• ３．Easier Handling

  Since the bending processing is easy (the minimum bend radius is two times longer than the sheath outer diameter), you can easily install the sensor at sites in places with many bends. (However, the tip of 70 mm is excluded)

• ４．Longer Product Life

  Since the RESIOPAK sheathed resistance thermometer sensor’s conducting wire and resistance element are insulated and sealed with chemically stable magnesium oxide, the product life is longer than conventional resistance thermometer sensors for aging change, disconnection, etc.

• ５．Excellent Mechanical Strength/Vibration Resistance

  The sensor can be used even under the conditions of a place with vibration, corrosive atmosphere, etc.

• ６．Sheath Outer Diameter Manufacturing Available

  We can manufacture a sheath outer diameter φ0.8 to φ12.75 mm. Up to φ1.0 mm is available for the minimum temperature sensing part outer diameter.

• ７．Sheath Length Manufacturing Available

  We can manufacture up to 300 m depending on the sheath outer diameter.

• ８．Special Needs Handling

  Since the sheath outer diameter is small and bending processing is easy, the sensor can be installed in a small space without disturbing the flow of the target to be measured. We have many types of sheath outer diameter and can also manufacture a single sheath with two elements (six conducting wires). We handle a wide range of needs with various outer diameters.

Structure of Resistance Element

Winding Resistance Element

An extremely fine platinum resistance wire coil is inserted into an alumina insulator and both ends are sealed.

Thin Film Resistance Element

Platinum is deposited onto an alumina substrate to form a circuit and the upper part of the circuit is insulated with glass.

Type of Resistance Thermometer Sensor

Remarks

• R100 is the resistance value of the resistance element at 100℃.
• R0 is the resistance value of the resistance element at 0℃.
• JPt 100 has been abolished.

Sheathed Resistance Thermometer Sensor Standard Specification

We can manufacture sensors with sheath diameters and materials other than the above.

List of Allowance for Temperature and Standards Applied by Each Country

Remarks

• The allowance is the allowable error maximum limit of the resistance value indicated by the resistance element converted with the standard resistance value table subtracting the measured temperature |t|.
• |t| is the measured temperature which is indicated with the temperature (℃) unrelated to + and - signs.
• The latest version is applied for the standard year.

Resistance Thermometer Sensor Connection Method and Color Indication

• 2-conducting wire type:

  Since the conducting wire resistance value is added to the resistance value, the conducting wire resistance must be decreased or must be known in advance. This type is rarely used except for the case of a relatively high resistance.

• 3-conducting wire type:

  Since the variation of three conducting wires resistance affects the accuracy, you must pay attention in the case of long distance transmission. This type is generally used in many cases.

• 4-conducting wire type:

  Since the conducting wire resistance does not affect the accuracy, this type is used for measurement with high accuracy. Generally the constant current is sent and the resistance value is measured with the potential difference.

Use Temperature Range

Basic Model

R35: Sheath Resistance Thermometer Sensor with Extension Lead Wire

Most basic model suitable for indoor usage.

T110/R110: Temperature Sensor with a Push-pull Connector

Adopting the latching system greatly shortens time and the sensor shows true value in all fields with its robustness, lightness and safety.

R96N: Outdoor Type Sheath Resistance Thermometer Sensor

This type has a drip-proof type terminal box, suitable for usage in an outdoor general environment.

R97N: Pressure Resistant Explosion-proof Type Sheath Resistance Thermometer Sensor

This type is suitable for usage in dangerous places where explosive gas may occur such as petroleum refining/petrochemical plants. It is designed according to the structure standard d2G4.

R99N: Hydrogen Explosion-proof/Pressure Resistant Explosion-proof Type Sheath Resistance Thermometer Sensor

This type is suitable for usage in dangerous places where explosive gas especially that which includes hydrogen may occur such as petroleum refining/petrochemical plants. It is designed according to the technical standard ExdIICT6.
For overseas, we have products which support ATEX (CE Marking), FM (U.S.A.), FMC (Canada), NEPSI (China), KOSHA (Korea), TR CU (Russia, Kazakhstan and Belorussian), PESO (India), and OSHA (Taiwan) explosion-proof.
Only for usage within Japan, a pressure-proof packing type connector must be attached.

Catalog

Inquiry

Product Information

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