Explosion-proof thermocouple

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WRN-240 series Explosion-proof thermocouple Is a kind of temperature sensor, in the chemical industr…

Productoverview:
WRN-240 series Explosion-proof thermocouple Is a kind of temperature sensor, in the chemical industry in the automatic control system is widely used, the temperature sensor can be temperature control object parameters into electrical signals transmitted to display, record and control apparatus, system implementation of detection, regulation and control. In the chemical plant, the production site is often accompanied by various inflammable and explosive chemical gas, steam, if using ordinary thermocouple is very unsafe, extremely easy to cause gas explosion. Therefore, in these occasions must use explosion-proof thermocouple as the temperature sensor, the company's production of explosion-proof thermocouple products applicable to the temperature group within the range of explosive gases in dangerous places.
Two, work principle:
WRN-240 series Explosion-proof thermocouple Is the use of gap explosion-proof junction box component design principle, with sufficient strength, all can produce a spark, arc and dangerous temperature components are sealed in a box cavity, when the cavity when the explosion occurred, the joint gap flameout and cooling, make fire after the explosion and temperature transmission to the outside of the cavity thus, flameproof.
Three, application:
WRN-240 series Explosion-proof thermocouple The application and use of instruments, usually display recording instruments, electronic computers and other supporting. Direct measurement of hydrocarbons in the production site and other explosives to 0 to 1300 DEG C within the liquid, steam and gas and solid surface temperature.
Four, main features:
1, various forms of explosion-proof, explosion-proof performance;
2, the pressure spring type temperature sensing element, good seismic performance;
3, large measuring range;
4, high mechanical strength, good pressure resistance.

Five, technical parameters:
Product executive standard
IEC584
IEC1515
GB/T16839-1997
JB/T5582-91

Six, installation method:
1, first of all should be measured or the screw thread of the thermocouple flange size, supporting flange or thread processing base.
2, according to the size of the base flange or threaded hole in the pipe, the need to measure.
3, the flange or the screw tooth of the welding. The flange or thread is inserted has opened hole in the flange or threaded seat base and pipeline measured welding.
4, the thermocouple with bolts or screw threaded into the base has good welding.
5, according to the wiring diagram to the thermocouple junction box connection, and display instrument is connected on the dial corresponding. Connection box can not contact with the wall of the measured medium pipeline, ensure the junction box temperature not exceeding 100 DEG C. Outlet hole junction box should prevent due to poor sealing, water vapor dust deposition caused by short circuit terminal.

Seven, the measurement range and basic error limit:

Note: t is the sense of temperature measured temperature component values (c) thermal inertia level 

Nominal pressure thermocouple: generally refers to the static outer protective tube can withstand working temperature and pressure rupture. 
The depth of the thermocouple insert: should not be less than 8-10 times the diameter of the protective sleeve (Frederick product exception) 
Insulation resistance: when the ambient air temperature is 15-35 DEG C, relative humidity is less than 80% when the insulation resistance is more than 5 megohm (voltage 100V). With the splash proof junction box of the thermocouple, when the relative temperature is 93 + 3 DEG C, the insulation resistance of more than 500 billion euro (voltage 100V) 
The insulation resistance of high temperature thermocouples under high temperature, the thermal electrode (including double type) and the insulation resistance between protection tube and double heat electrode (per meter) should be greater than the value specified under the table. 
Eight, the selection of encoding:

Cases: Explosion proof type thermocouple , type K, grade I, fixed thread M27 * 2, explosion-proof grade D BT4 grade II, 316L protection tube length is 450mm, the insertion depth of 300mm. WRN-240, L * l=450 * 300, M27 * 2, D II BT4 protection tube 316L. 
7, Design selection and ordering information:
1, model;
2, division no.;
3, explosion-proof grade;
4, precision grade;
5, fixed form;
6, protection tube material;
7, the length or depth of insertion. 
Customer service service commitment:
1, I sold by the company Thermocouple series The product within twelve months of quality problems, 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.