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Explosion-proof thermocouple

Flame-proof thermocouple used in industry is a kind of temperature sensor, a wide application in the…

Description:

One. Product overview

Flame-proof thermocouple used in industry is a kind of temperature sensor, a wide application in the chemical industry control system, through the temperature sensor, can control the temperature of the object parameter into electrical signal, passed to the display, record and adjusting device, the system testing, adjusting and control.

In chemical plant, the production site is often accompanied by various kinds of flammable, explosive chemical gas, steam, if use common thermocouples are not safe, easy to environment caused by gas explosion.On these occasions, therefore, must use the flame-proof thermocouples as temperature sensor, this company produces the flameproof thermocouple products, suitable for d Ⅱ CT6 range temperature classes is the explosive gases in dangerous places.

2. How it works:

If by two kinds of different ingredients of homogeneous electrode (heat) closed conductor loop, when the temperature gradient is at both ends, the loop is an electric current passes through, so both ends existed between thermoelectric potential (as shown in the figure below)


3. Explosion-proof principle:

Using the clearance flame-proof principle, design has enough strength of the junction box, and other components, all can produce spark, arc and dangerous temperature zero parts are sealed in the terminal box, when an explosion cavity, can extinguish fire by joint clearance and cooling, make after the explosion flame temperature and not to the cavity


4. Product points:

According to the latest explosion-proof procedures conform to international IEC standard GB3836 design;

By using two cavity flame-proof structure, change the temperature measuring device is simple, safe and reliable use


Flame-proof mark d Ⅱ CT6, suitable for Ⅱ C below level, ignition temperature above T6, with explosive gas temperature measurement.

5. Selection methods:

W temperature instrument






R thermocouple

Temperature sensing element material
N copper nickel chrome - nickel
E nickel chrome - nickel and silicon
F iron - copper and nickel
C copper - copper and nickel

I silk logarithmic
No single -
2 - double -Install the fixed form

2 fixed screw thread
4 fixed flange
6 fixed screw cone form

Junction box form
4 - the flame-proof type

Protecting tube diameter
0 - phi 16
1 - phi 20



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