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In industrial temperature measurement, primarily, three types of dial thermometers are used: bimetal thermometers, gas-actuated thermometers, and expansion thermometers. Which measurement principle should be used depends on several different factors, such as response time, temperature limits & application range.
What is a bimetal thermometer and how does a bimetal thermometer measure?
Bimetal thermometers are thermometers based on the functional principle that metals expand differently depending on the temperature change. A bimetal thermometer always consists of two different metal strips that have a different thermal expansion coefficient. The two strips are joined together inseparably and thus form the bimetal strip. When the temperature changes, the different metals expand to different degrees, which leads to a mechanical deformation of the bimetal strip. This mechanical deformation can be detected in a rotary movement. The measuring system works in the form of a helical or spiral tube. This movement is transmitted to the pointer of the thermometer via the pointer shaft, which thus enables the temperature to be measured.
In which applications are bimetal thermometers used?
Bimetal thermometers are used in many different industrial applications, e.g. in machine building, heating technology, and air conditioning and refrigeration technology. The wide variety of models bimetallic thermometers offer a large selection of thermometers in a wide range of applications.
The model 52 bimetallic thermometer, with its case and stem made of stainless steel, represents the entry-level model among the process thermometers but is also used for demanding applications in machine building.
The model A48 bimetal thermometer has been specifically developed for use in air-conditioning and refrigeration technology to measure the temperature in air ducts, whereas the model A43 bimetal thermometer was developed as a standard version for simple temperature indication in heating technology. As you can see, we offer a suitable thermometer for every application. Our specialists will be happy to advise you on your selection.
Bimetal Thermometer Products Description
Industrial Use Bimetal ThermometerBimetal thermometer is used to measure the temperature field instrumentation can be used to directly measure the temperature of the gas and liquid. Compared with glass mercury thermometers have no
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WSS-411 Bimetal Thermometer With Electric ContactWSS-411 Bimetal thermometer with electric contact. accuracy class: 1.5,material : stainless steel. dial 60mm ,probe length:50-2000mm. OEM service is provided. contact Yucheng technology for more
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Axial Type Electric Contact Temperature GaugeAxial type or Radial type electric contact bimetal thermomteer. accuracy class: 1.5,material : stainless steel. dial 60mm ,probe length:50-2000mm. OEM service is provided. contact Yucheng technology
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WSSX Electric Contact Bimetal Thermometerwss-381 electric contact bimetal thermomteer. accuracy class: 1.5,material : stainless steel. dial 100mm ,probe length: 300mm. OEM service is provided. contact Yucheng technology for more inforamtion
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SS Bimetal Thermometer Temperature GaugeSS Bimetal Thermometer Temperature Gauge. Rear connection bimetallic thermometer for measuring temperatures from 0 to +120°C. Mount the thermometer with a brass thermowell that has a female G 1/2
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200mm Stem Bimetallic Thermometer With Thermowell200mm stem bimetallic thermometer with thermowell. Rear connection bimetallic thermometer for measuring temperatures from 0 to +120°C. Mount the thermometer with a brass thermowell that has a female
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0 To +120°C Custom Bimetallic Thermometer0 to +120°C Custom Bimetallic Thermometer . Rear connection bimetallic thermometer for measuring temperatures from 0 to +120°C. Mount the thermometer with a brass thermowell that has a female G 1/2
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Stainless Steel Temperature Gauge For IndustrialStainless Steel Temperature Gauge For Industrial. Stainless steel case & stemStem length available from 50 mmBottom / back / every angle entrySilicon oil filled (optional)With or without
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YC Make Bimetallic Temperature GaugeYC Make Bimetallic Temperature Gauge. Stainless steel case & stemStem length available from 50 mmBottom / back / every angle entrySilicon oil filled (optional)With or without thermowellExternal zero
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Hangzhou Yucheng Science & Technology Co., Ltd is a professional manufacturer of pressure equipment, our factory was founded in 2005 and specializes in manufacturing pressure gauges, thermometers, transmitters, and related accessories.
All our pressure equipment was widely used in the Oil & Gas refinery, textiles, chemical, food, and beverage industries.
ISO9001:2000 certificated company, to guarantee excellent product quality.
Main clients from Africa, South America, North America, and Asia. and Europe.
Our production capacity: about 1 million sets of various kinds of pressure equipment.
Our location: factory in Ningbo and Hangzhou, office in Hangzhou.
Contact us for any request. we will design and produce the right product according to your request at a competitive price.
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What are the advantages and disadvantages of bimetal thermometers?
Compared to gas-actuated thermometers, bimetal thermometers are much cheaper in terms of price. This price advantage is due to their simpler construction.
The scale ranges of bimetal thermometers are between -70 and +600 °C (-94 and +1,112 °F) with accuracy classes 1 and 2 by EN 13190. For applications in which high vibrations occur, thermometers with liquid filling are used. For the filling, silicone oil is used, which damps the vibration and limits the maximum temperature to +250°C (482 °F).
When the temperature changes, all types of dial thermometers react by the same principle; the expansion principle. The difference, however, is that with the bimetal thermometer, the rotary movement of the bimetal can only be shown directly on the display. With the gas-actuated thermometer, on the other hand, the measured value can easily be transmitted via capillary due to its inert gas filling. Remote capillaries can even be used here to install gas-actuated thermometers up to 60 meters away from the measuring location. Expansion thermometers can also be installed via remote capillaries, but, instead of an inert gas, a filling medium is used for the measuring system, e.g. xylene or silicone oil.
The final decision on which dial thermometer to use depends on several different factors. Our specialists will be happy to advise you in the selection of the right thermometer.
Using a Bimetallic Stemmed Thermometer
These thermometers usually measure temperatures from 0º F to 220º F. Check the metal stem for a notch or slight indentation as an indicator of how far into the food the thermometer must be placed to take an accurate reading. Do not leave thermometer in food while it is cooking.
A thermometer is your best defense against temperature abuse. However, it is of no use if it is not measuring the temperature of food accurately. You should calibrate your thermometer any time you have used it in a very hot to very cold food, it’s been dropped, if it does not appear to be taking accurate readings, and on a regular basis. The easiest way to calibrate a thermometer is by using the Freezing Point Method.
Place the metal stem thermometer at least 2 inches, without touching the bottom or sides, into a container filled with crushed ice and water. When the recording needle stops moving for at least one minute, read the dial. It should read 32º F. If it does not, then, while keeping the thermometer in the ice water, adjust the calibration nut at the base of the dial until the needle is at 32º F. Wait another 15 seconds to be certain it maintains a temperature of 32º F.
Bimetal Thermometer FAQ
01. What is a bimetallic stemmed thermometer used for?
02. How accurate is a bimetallic thermometer?
03. What is the most accurate way to calibrate bimetallic thermometers?
04. Which type of thermometer is the most widely used in food?
05. How often should your bimetallic thermometer be calibrated?
We're well-known as one of the leading bimetal thermometer manufacturers and suppliers in China, featured by cheap products and good service. We warmly welcome you to wholesale custom made bimetal thermometer at competitive price from our factory.
