Double metal thermometer

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WSS series Double metal thermometer Is the field detecting instrument for measuring low temperature.…

Productoverview:
WSS series Double metal thermometer Is the field detecting instrument for measuring low temperature. Liquid steam and gas temperature can be directly measured in various production processes of -80 in the range of -+500 DEG C.Industrial use of double metal thermometer main element is one with two or more metal sheet laminated together to form a multilayer metal sheet, the principle of expansion work in varying degrees of temperature change when using two different metals. Is wound into a double sheet metal ring bent on. At the end of heating expansion, drives the pointer to rotate, the instrument will display the temperature value of the thermal potential.
Two, work principle:
WSS series Double metal thermometer Is the principle of expansion work in varying degrees of temperature change when using two different metals. The main components for industrial use is one with two or more metal sheet laminated together to form a multilayer metal sheet. In order to improve the measurement sensitivity, usually made of sheet metals of spiral shape. When the multilayer metal sheet temperature changes, each layer of metal expansion or shrinkage range, so that the spiral rolled up or loosen. Since the end of the spiral coil is fixed and the other end and a pointer can rotate freely. Therefore, when the feeling of double sheet metal to temperature changes, in a pointer to the circular indexing on the gauge indicates the temperature to.
Three, application:
WSS series Double metal thermometer It can directly measure the production process in a variety of -80 to +500 DEG C range of liquid, steam and gas temperature. Widely used in petroleum, chemical, machinery, shipbuilding, power, textile, printing and dyeing industry and scientific research departments.
Four, main features:
1, the scene display temperature, convenient, safe and reliable, long life and other characteristics.
2, victims of mercury free, easy reading, strong shock.
3, the protection pipe of 1Gr18Ni9Ti stainless steel and two molybdenum titanium, pressure, strong corrosion resistance.
4, core pulling type thermometer can not stop short time maintenance or replacement of movement.
5, axial, radial type, 135ordm; type, universal type, complete varieties, suitable for various on-site installation need.

Five, technical parameters:
1, the implementation of standards: JB/T8803-1998 GB3836-83;
2, dial diameter: 60100150;
3, accuracy: (1, 1.5);
4, thermal response time: less than 40S;
5, protection grade: IP65;
6, adjust the angle error: adjustment angle error should not exceed the range of 1%;
7, back to the poor: the return difference should not be greater than the absolute value of the basic error limit;
8, repeatable: repeatability limit should be less than the absolute value of basic error of 1/2.

Note:
1, can not be directly screw head;
2, the length of choice to choose the standard size close to the (integer multiples of 50mm);
3, the protective tube immersionmedium measured in length must be greater than the length of the sensing element, the general recommended immersion length is greater than 100mm, 0-50 DEG C immersion length range is more than 150mm, to ensure the accuracy of measurement.
4, should not be used to measure open container medium temperature.
In 5, storage, installation and transportation, should avoid collision protection tube, do not allow the protection tube bending change, but not the table when using the wrench.
6 regular inspection, under normal conditions of use should be. In general, every six months.
7, not allowed to work in the strong vibration environment, to prevent the influence of double metal life, does not allow the use of electric contact in the control loop vibration occasions, so as not to affect the reliability.

Seven, temperature range:

Remarks：
One The insertion depth of the thermometer, L Must be greater than Lmin , L Alternative series: One hundred , One hundred and fifty , Two hundred , Two hundred and fifty , Three hundred , Four hundred , Five hundred , Seven hundred and fifty , One thousand , One thousand two hundred and fifty , One thousand and five hundred , Two thousand So, also can be customized according to user needs.
Two And the protective tube diameter Phi 6 , Phi 8 The series of thermometers, the time constant is less than FortySecond, diameter Phi 10 When the time constant is less than Thirty Seconds.
Three Protect the stainless steel tube 1Cr18Ni9Ti Manufacturing, at room temperature under high working pressure is Zui 6.4MPa .

Eight, shape and size:

Nine, the specific model name that said:

One Axial type

Two Radial type

Three , 135 degrees To type

Four Universal type

Ten, the selection of encoding: