Flanged sheathed bimetal thermometer is suitable for medium and low temperature field detection, can directly measure the temperature of liquid, gas and steam, with no mercury damage, clear indication, strong, vibration resistance. The sheathed bimetal thermometer instrument is made of stainless steel, which has good waterproof and corrosion resistance. Widely used in petroleum, chemical, metallurgy, textile, food and other industries.
Parameter description:
Case diameter | 100MM |
Temperature range | -40 ~ 600℃ |
Case material | SUS-304 stainless steel |
Probe rod material | SUS-304 stainless steel |
Temperature measuring rod length | 50 ~ 300MM, can also be customized according to requirements |
Joint thread | Flange sheath type, DN15, DN25, DN40, etc |
Angle adjustment error | The Angle adjustment error shall not exceed 1.0% of its range |
Return difference | The thermometer return error should not be greater than the absolute value of the basic error limit |
accuracy level | Plus or minus 2.5% |
Structural principle | Bimetal thermometer is wound into a threaded shape of the hot bimetal sheet as a temperature sensing device, and it is installed in the protective sleeve tube, one end is fixed, called the fixed end, the other end is connected to a thin shaft, called the free end. The free end spool is provided with a pointer. When the temperature changes, the free end of the temperature sensing device will rotate accordingly, driving the pointer on the thin axis to produce an Angle change, indicating the corresponding temperature on the scale. |
Note:
● Bimetal thermometer use and maintenance
1 Metal thermometer in the storage, installation, use and transportation process, should try to avoid collision with the protective tube, do not bend the protective tube, deformation. When installing, do not twist the instrument housing; The instrument should work normally in the ambient temperature of -30℃ ~ 80℃; The temperature at which the instrument often works is best at 1/2 to 3/4 of the scale range.
2. The installation of bimetal thermometers should pay attention to the accuracy of temperature measurement, safety and easy maintenance, and does not affect equipment operation and production operations. To meet the above requirements, for the temperature measurement of high temperature, high pressure and high speed fluids (such as the main steam temperature), in order to reduce the resistance of the protective sleeve to the fluid and prevent the fracture of the protective sleeve under the action of the fluid, the protection tube can be shallow inserted or the hot sleeve thermal resistance can be used. Shallow plug type thermal resistance protection sleeve, the depth of the main steam pipe inserted should not be less than 75mm; The standard insertion depth of the hot-sleeve resistance is 100mm;
3. If it is necessary to measure the temperature of the flue gas in the flue, although the diameter of the flue is 4m, the insertion depth of the thermal resistance can be 1m.
4. When the insertion depth of the measured element exceeds 1m, it should be installed vertically as far as possible, or a support frame and protective sleeve should be installed.
