- Signal Conditioners
Applications: SPE-RTD100K sensors is a mineral insulated resistance thermometers.Generally, electrical resistance of metal varies, depending on the temperature. Platinum in particular is more linear and has a larger temperature coefficient than most other metals. It is therefore, most suitable for temperature measurements. Platinum has excellent properties chemically and physically. Industrial high purity elements are readily obtained for long term use as a resistance element for temperature measurements. The characteristics are specified in JIS and other foreign standards; thus, it permits a highly accurate temperature measurement
-A wide range of measurement
Due to its very small outer diameter, this resistance thermometer sensor can be inserted easily into any small measuring object. It is used over a wide range of temperatures, from -200℃ to +500℃.
This resistance thermometer sensor has a small heat capacity due to its smail size and is highly sensitive to small changes in temperature and has a quick response.
Its flexible feature (bending radius more than double the sheath outer diameter) makes for simple and on-the-spot installation into complex configurations. The whole unit, except for the 70mm at the tip, can be bent to fit.
-Long life span
Contrary to conventional resistance thermometer sensors which have a deterioration of resistance value with age or open circuits, etc., resistance thermometer sensor lead wires and resistance elements are insulated with chemically stable magnesium oxide, thus assuring a very long service life.
-Excellent mechanical strength, and vibration resistance.
High performance is assured even under unfavorable conditions such as when used in vibrating installations, or in corrosive
-Custom sheath outer diameters available
Sheath outer diameters are available, between 0.8 and 12 mm.
-Custom long lengths available
Lengths are available up to 30 m maximum, depending on the outer diameter of the sheath.
Type of Resistance thermometer sensor
|Nominal resistance value at℃||Class||Measuring current||R(100℃) / R(0℃)|
|1. R(100℃) is the resistance value of the sensing resistor at 100℃.|
|2. R(0℃) is the resistance value of the sensing resistor at 0℃.|
Standard Specifications of Resistance Thermometer Sensor
|OD(mm)||WT(mm)||Material||Dia(mm)||Resistance per wire||Material||(m)||(g/m)|
Tolerance of RTDs to Temperature and Applicable Standard Table
|IEC 751||JIS C 1604|
|Class||Tolerance (℃)||Class||Tolerance (℃)|
|Pt100||A||±（0.15 +0.002|t|）||A||±（0.15 +0.002|t|）|
|1.Tolerance is defined as the maximum allowable deviation from the temperature vs resistance reference table．|
|2. l t l=modulus of temperature in degrees Celsius without regard to sign．|
|3. Accuracy class 1/n(DIN) refers to 1/n tolerance of class B in IEC 751|
Wiring method of RTDs
Since a conductor resistance is added to the resistance value. It is necessary to reduce the conductor resistance in advance. This type is not usually used except for a high resistance RTDs.
Use to eliminate the effect caused by conductor resistance. Care should be taken for long. Distance transmission because a variation of resistance of conductor has an effect on accuracy. This type of connection is widely used in industrial applications.
This type of connection is used for high-accuracy measurement and standards because it is not affected by conductor resistance. Generally, a constant current is applied and the resistance value is measured by a potential difference.
|MI RTD Operating Temperature Range|
|Symbol||Division||Operating temp range|
|L||For low temperature||-200～ +100|
|M||For medium temperature||0～350|
|H||For high temperature||0～550|