AKLT-T-SJS integrated bimetallic thermometer

WSS series bimetallic thermometer

1、 The use of bimetallic thermometers

Bimetallic thermometer is a field detection instrument suitable for measuring medium and low temperatures. It can be used to directly measure the temperature of gases, liquids, and vapors in various production processes, and is actually used for temperature measurement in the field and without power supply. The live contact bimetallic thermometer can automatically send control signals to cut off power or alarm when the working temperature exceeds the given value.

Bimetallic thermometers have the advantages of being mercury free, easy to read, sturdy, and vibration resistant. They can replace industrial glass mercury thermometers and are widely used in industrial and scientific research sectors.

Bimetallic thermometers are divided into three types: ordinary type, outdoor type, and anti-corrosion type. The ordinary shell is plated with iron sheet and the protective tube is made of stainless steel, suitable for general indoor occasions. The outdoor shell is made of aluminum alloy (or stainless steel), and the protective tube and connecting wire are all made of stainless steel, with good sealing performance. Suitable for outdoor general corrosion-resistant places. The anti-corrosion shell is made of all stainless steel, and the protective tube and connection are made of 304SS material. The link section uses sealant, which can be used for measuring most corrosive media, liquids, and gases.

IIThe structural principle of bimetallic thermometer

It works by utilizing the principle that two different metals expand differently when the temperature changes. The main component of industrial bimetallic thermometers is a multi-layer metal sheet composed of two or more metal sheets stacked together. An instrument that can automatically and continuously record changes. To improve temperature sensitivity, metal sheets are usually made into a spiral coil shape. When the temperature of multi-layer metal sheets changes, the expansion or contraction of each layer of metal is uneven, causing the spiral coil to roll up or loosen. Due to one end of the spiral coil being fixed and the other end being connected to a freely rotating pointer, the two metals undergo different changes in volume when the temperature changes, resulting in bending.

The axial thermometer pointer is directly mounted on the core shaft. The radial structure indicator pin is connected to the core shaft through a corner spring. When the temperature changes, the free end of the temperature sensing element rotates, and the pointer driven by the core shaft indicates the change in temperature of the measured medium on the dial. Electric contact thermometer, with movable contacts on the pointer and fixed contacts on the set pointer. The pointer contact rotates with temperature changes. When the temperature reaches or exceeds the set value, the contact closes and sends a signal, achieving the purpose of automatic control and alarm.

The temperature measurement range of this instrument is -80--500 ℃, allowing both strokes of the ruler1%about. This thermometer has a similar purpose as a rod-shaped glass liquid thermometer, but can be used under conditions with higher strength requirements.

3、 Characteristics of bimetallic thermometers

Bimetallic thermometer is a field detection instrument suitable for measuring medium and low temperatures, which can be used to directly measure the temperature of liquefied and gas. Comparison between bimetallic thermometers and similar domestic products: Instrument accuracy level reaches1.0--Grade 2.5, the upper shell of the instrument is made of anti-corrosion materials, and its temperature resistance can reach up to200℃The minimum is-40℃The flange structure and double-layer sealing rubber ring have good anti-corrosion and waterproof performance. The welding of the protective tube adopts fully automatic argon gas protective tube, with a firm weld and minimal intergranular corrosion. The scale plate is an aluminum oxide printing plate with a clear and aesthetically pleasing surface. The pointer is internally adjustable. Bimetallic thermometers have axial types,RADIAL,Universal typeEquipped with remote transmission type and hot set type. Selection of electric contact type and other meter head models.The length of the probe of the bimetallic thermometer can be customized according to customer needs. On site temperature display, intuitive and convenientSafe and reliable, with a long service life; Core pulling thermometer, can be maintained or replaced for a short period of time without stopping the machine. Axial type, radial type135°CThere are a complete range of types such as universal type and universal type, which are suitable for various on-site installation needs.

4、 Model naming of bimetallic thermometers

5、 Technical parameters

1. Implement standardsJB/T8803-1998

2. Classification: Axial type, Radial type, Universal type, etc

3. Nominal diameter of dial (mm):60，100，1504.

4. Accuracy level:（1.0），1.5， （2.5）

5. Thermal response time:≤40S

6. Protection level:IP55

7. Angle adjustment error: The angle adjustment error should not exceed its range1%

8. Return difference: The return difference of the bimetallic thermometer should not exceed the absolute value of the basic error limit

9. Repeatability: The repeatability limit range of bimetallic thermometers should not exceed the absolute value of the basic error limit1/2Main technical parameters

10. The contact points of the thermometer are upper and lower limits, single limit, and double upper limit (all normally open).

11. Rated power of contact: 10VA(No sensory load)

Maximum operating voltage:380V

Maximum operating current:1A

12. Workplace temperature: --40---+85 ° C

Relative humidity in the workplace:5----100%

13.WSSThe series of bimetallic thermometers belong to vibration resistant mechanical instruments

14. When measuring temperature, the protective tube should be placed underneath100mmImmerse the entire length into the measured medium to maintain temperature accuracy.

The temperature at which the instrument frequently operates is best within the range of the scale1/2--3/4Here.

Temperature range of bimetallic thermometer:-80～+40℃、 -40～+80℃、 -20～+60、-20～+100、0～50℃、 0～100℃、 0~120 ℃, 0～150℃、 0~160 ℃, 0～200℃、 0~250 ℃, 0～300℃、 0~350 ℃, 0～400℃、 0~450 ℃, 0～500℃0~550 ℃, 0~600 ℃, etc,Specially customizable.

6、 Parameters required for selecting a bimetallic thermometer:

1Dial diameter

2. Temperature range

3. Installation method

4. Measure insertion depth

5. On site industrial and mining facilities

6. Measurement medium

7. Connection thread size (or flange size)

7、 Precautions and maintenance for the use of bimetallic thermometers

1 WSSDuring the storage, installation, use, and transportation of the series bimetallic thermometer, it is advisable to avoid colliding with the protective tube and avoid bending or deforming it. During installation, it is strictly prohibited to twist the instrument housing as a wrench.

2. The length of the bimetallic thermometer protection tube immersed in the measured medium must be greater than the length of the temperature sensing element. Generally, the immersion length is greater than100mm，0--50°CThe immersion length of the measuring range is greater than150mmTo ensure the accuracy of the measurement.

3. All kinds of bimetallic thermometers are not suitable for measuring the temperature of the medium in open containers. Contact thermometers are not suitable for use in control circuits with high working vibration.

4. The thermometer should be regularly inspected under normal use. Usually every6It is advisable to inspect once a month.

5. Electric contact thermometers are not allowed to operate under strong vibrations to avoid affecting the reliability of the contacts.

6. This product comes with a three guarantee policy.