Lunte specializes in the design and manufacture of temperature sensors and nuclear measurement instruments, involved in industries such as industrial, nuclear power, and is recognized as a national-level "little giant" enterprise and a "hidden champion" enterprise in Zhejiang Province.
Linear dynamic surface thermocouples (temperature measuring cables or thermal cables) are used for temperature measurement and early warning on the surface of coal-water slurry gasifiers.
Product Overview
The linear dynamic surface thermocouple functions similarly to conventional thermocouples, based on the principle of the thermoelectric effect. Its characteristic is that when the temperature of any point on the surface of the measured equipment increases, the temperature value of that point can be measured.
The positive and negative thermocouple wires are isolated from each other by a material with a high negative temperature coefficient, which is a material whose insulation resistance decreases sharply with an increase in temperature. This isolation packaging allows for the continuous generation of the highest millivolt potential values along the entire length of the cable.
At any point along the length of the linear dynamic surface thermocouple, when the temperature at that point exceeds the temperature of the rest of the thermocouple, the resistance of the insulating material between the thermocouple wires at that point decreases, forming a "temporary" hot junction (T1). If a second higher temperature point (T2) occurs at any other part of the cable, the insulation resistance between the wires at that point will decrease and be much lower than the resistance at point T1, forming a new "temporary" hot junction. This "temporary" hot junction functions the same as the conventional single-point hot junction of a thermocouple.
| name | Parameter description |
|---|---|
| lectotype | xdB-WRKK- (optional code) |
| Optional Code (Operating Temperature) | A(100~350℃); B(0~150℃); C(200~450℃); D(300~600℃); |
| Explosion-proof rating | ExdllC T1~T6 Gb; Exia llC T1~T6Ga |
| Ingress protection | IP66 |
| Temperature measuring element | Type K thermocouples |
| Output signal | The DC number milli signal corresponding to the maximum temperature point temperature of the cable |
| Insulation protection | Fiberglass is used with special insulating materials |
| Filler material | New NTC materials (manganese-based oxides) |
| Temperature measurement range | 0℃~600℃ |
| Outer diameter size | 3mm |
| Longest continuous length | 60m |
| Connection | The high-temperature ceramic connectors, specifically designed by OMEGA, are used with a plug-and-play connection, making them convenient to use and easy to maintain. The additional protective box ensures an IP66 protection rating. The redundant connection method allows the correct temperature to still be detected even when the thermocouple is broken into two segments. |
| Reaction properties | There is no need for activation treatment, and it can be installed and used |
| Fixation | pressing plate, reinforcing fixture; The loop radius is 20 times the diameter of the element. |
| Design life | 20year |
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