Industrial thermal resistors are used as sensors for measuring temperature and are usually used in conjunction with display instruments, recording instruments and electronic regulators. It can directly measure the surface temperature of liquid steam and gas media as well as solids in various production processes ranging from ℃ to ℃.
According to national regulations, we can produce two types of assembled unified design resistors, namely graduated platinum thermal resistors and graduated copper thermal resistors, that comply with international standards.
Thermal resistance uses the characteristic that the resistance of a substance changes when its temperature changes to measure temperature. The heated part of the thermal resistor (temperature sensing element) is made of thin metal wires evenly wound around a frame made of insulating material. When there is a temperature gradient in the measured medium, the measured temperature is within the range of the temperature sensing element. The average temperature in the dielectric layer.
The assembled thermal resistor mainly consists of a junction box, a protective tube, a terminal block, an insulating sleeve and a temperature-sensing element, and is equipped with various installation and fixing devices. The temperature-sensing element of the type platinum resistor is a platinum wire winding. The double platinum resistor is mainly used in situations where two sets of displays, recording and adjusting instruments need to be used to detect the temperature of the same place at the same time. The temperature sensing element of the type copper resistor is a copper wire winding.
●Main technical indicators
Temperature measurement range and accuracy
Thermal resistance category
Measuring range ℃
Graduation number
Allowable deviation △ ℃
Type platinum resistor
～
Grade tolerance (+︱)
Grade tolerance (+︱)
Type copper resistor
～
~ ℃ tolerance (
Note: the absolute value of the actual measured temperature of the temperature sensing element.
●Model indication
Hongde temperature instrument
Thermal resistance
Temperature sensing element material graduation number
Platinum
Copper
Inner core structure
Armored structure
Resistance element
None
Single
Double
Installation and fixing form
No fixing device
Fixed thread
Movable flange
Fixed flange
Active pipe joint type
Fixed thread cone type
Junction box type
Blowout prevention type
Waterproof
Protection tube diameter
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Selection example
WZP-430 thermal resistor----Hongde Measurement and Control preferential supply 609