Variable diameter thermocouple

Productoverview:

WRN series Variable diameter thermocouple Improved product structure is developed based on the conventional thermocouple assembly, it is in the end part of the measurement by means of welding small protection tube, the measuring end part diameter reduced to 8 ~ 12mm in diameter, thereby overcoming the conventional response time is slow in the hot assembly. Thermocouple is one of the most commonly used temperature sensor industry.

Two, work principle:

WRN series variable diameter type thermocouple is two kinds of different materials of the conductor or semiconductor A and B welded together to form a closed loop. When two points of attachment conductor A and B 1 and 2 between the temperature difference between the two, will produce electromotive force, thus forming a size of the current in the circuit, this phenomenon is called the thermoelectric effect. Thermocouples use this to work.

Three, application:

WRN series variable diameter thermocouple can directly measure the production site of the presence of hydrocarbons and other explosive 0 to 1300 DEG C within the liquid, steam and gas and solid surface temperature. Usually, and display instruments, recording instruments, electronic computers and other supporting the use of.

Four, temperature compensation for thermocouple cold end of the:

The thermocouple materials are generally more expensive (especially the use of precious metals, and points to the instrument) are very far distance, in order to save the thermocouple material, reduce the cost, usually by the cold end of thermocouple compensation wire (free end) extends to the temperature relatively stable place, connected to the meter terminal. It must be pointed out that the thermocouple wire function only to extend the power pole, the terminal to the cold end of the thermocouple instrument, it itself does not eliminate the influence of temperature change on the temperature of the cold end, do not play the role of compensation. Therefore, the need to adopt other correction method to compensate the cold end temperature of t0 = 0 degrees of temperature effect.

Five, advantages:

1, high precision measurement. Thanks to direct contact with the object, is not affected by the intermediate medium.

2, wide measuring range. The commonly used thermocouple from -50~+1100 C can be continuous measurement, some special thermocouple minimum measured to -269 degrees (such as gold iron nickel chromium).

3, simple structure, convenient use. A thermocouple is usually composed of two different metal wires, and the limitation of size and opening, with protective sleeve, it is very easy to use.

Six, technical parameters:

1, electrical outlet: M20x1.5, NPT1/2;

2, size: M20x1.5, NPT1/2 connection;

3, protection grade: IP65;

4, every burst: D "BT4, D, CT5.

The formation and structure of seven kinds of thermocouple:

(1) the type of thermocouple:

The commonly used thermocouple can be divided into standard thermocouple and non standard thermocouple two categories. The so-called standard thermocouple refers to the national standard, the relationship between the thermal potential temperature and allowable error, and indexing table standard thermocouple, which shows its supporting instrument available. Non standard thermocouple in the range of use or magnitude are not standardized thermocouple, in general there is no unified indexing table, mainly used for measuring some special occasions. Standard thermocouple according to IEC international standard production, and designated S, R, B, K, N, E, J, T eight standard thermocouple thermocouple for unified design.

(2) the structure form of the thermocouple, thermocouple in order to ensure the reliable and stable work, the structure of its requirements are as follows:

Two the composition of thermoelectric pole welding thermocouple must be strong;

Good insulation should be between two thermode each other, to prevent short circuits;

The free end of the thermocouple compensation wire and connected to the convenient and reliable;

The protective sleeve should be able to guarantee the thermode fully isolated from harmful medium.

Eighth, code:

Note: 1, according to the ordering protocol I thermocouple;
2, the protective tube is made of 1Cr18Ni9Ti material, the order according to the agreement.
Nine, design selection and ordering information:
1, model;
2, division no.;
3, precision grade;
4, protection tube material and form;
5, the length or depth of insertion.
Customer service service commitment:
1, my company sold Zhongwei thermocouple series product quality problems within twelve months, responsible for free maintenance.
2, the warranty period if the products of our company have any quality problems, our company is responsible for free repair or replacement.
3, the warranty period if the user use undeserved, cause damage to the product, our company is responsible for the maintenance, collect the damaged parts cost.
4, after the warranty period of product quality problems, our company is responsible for the maintenance, collect the damaged parts cost.
5, if the user needs to our service, our company in the province of the user service personnel arrived at the scene within 12 hours, arrived at the scene 48 hours outside users.