Industrial temperature gauge

Monitoring temperature is an important parameter in various industrial applications. The industrial temperature gauge operates on the gas actuated, bi-metal or expansion principle. It can measure temperatures in industrial sectors ranging between -200 to +700°C.

To understand the industrial temperature gauge concept and its functions, we will discuss basic FAQs in this guide. Then, at the bottom of the guide, you will grasp the basics of the industrial temperature gauge.

1. What is an industrial temperature gauge?

The industrial temperature gauge measures temperature in different ranges and accuracies. There are varieties of temperature gauges to facilitate a range of industrial applications. In addition, there are various liquid or gas-filled thermometers with options of temperature switches.

In various industries, during the forming of a structural steel beam, the carbon/iron mixture changes the crystalline pattern, affecting the strength of the finished beam. In addition, the temperature influences the physical properties of the electronic device by monitoring these influences through various tools.

2. How does an industrial temperature gauge work?

The industrial temperature gauge uses a thermometer to measure the temperature of the homogenous substance. These are the devices that measure temperature readings by using electrical signals. The sensor in the industrial temperature gauge generates voltage once the temperature change is detected. The temperature sensor is very important in maintaining the specific temperature in equipment.

The industrial temperature gauge works depending upon the type of temperature sensor. The sensor can be bi-metal, liquid, gas, or electronic. While calculating the temperature, accuracy and responsiveness are very crucial.

3. Why is it important to measure temperature?

The temperature determines the content of thermodynamic energy in any application. The thermodynamic energy shows the average velocity of the molecular movement. For measuring temperature, you have to measure one of the basic units. For measuring temperature, you have to measure the thermodynamic energy, and for that, the measuring principle is used and where the medium affects the sensor element.

For measuring the temperature using an industrial temperature gauge, you have to reach the same velocity of molecules in sensor and medium. With the same velocity, the two bodies will have the same temperature. It will be achieved by:

• Bodies getting mutual balance,
• The bodies must not exchange heat with external or internal sources and,
• Bodies must have thermal contact for a long time.

4. What is the principle of temperature measurement?

The basic principle of measuring temperature by industrial temperature gauge is through the voltage across the terminals. With the increase in voltage, the temperature also rises after the voltage drop between the base and emitter terminals. Therefore, you can measure the temperature based on electrically measurable changes within the materials when exposed to temperature changes.

These temperature changes could be the changes in resistance in conducting materials, thermal voltage and changes in frequency, noise changes, changes in resistance in semiconductors, etc.  The principles used by the industrial temperature gauge are frequency and resistance thermometers.

The temperature change is sensed by a vibrating wire sensor and is converted into an electrical signal as a frequency to a read-out unit.

5. What are the types of industrial temperature gauges?

There are various types of industrial temperature gauges that can be helpful for various industrial applications. We will discuss them thoroughly.

Bimetal temperature gauge

This industrial temperature gauge has a helical or spiral tube structure, and the measuring system has two sheets with different expansion coefficients. The temperature changes result in rotational movement due to the deformation of metal strips. When one end of the measuring system is clamped, the other starts rotating the pointer shaft. The bimetal industrial temperature gauge can measure a range of -70 to +600°C following EN 13190.

Expansion temperature gauge

The expansion temperature gauge has a temperature sensor, Bourdon tube, and a capillary. The change in temperature causes the internal pressure of the thermometer to change. The pressure is given to the pointer shaft, and as a result, the temperature value appears on the scale. The expansion temperature gauge has capillaries from 500 to 1000mm long, taken from remote measuring points. It has an average temperature range of -40 to +400°C with class 1 and 2 accuracies following EN 13190.

Gas-actuated temperature gauge

The gas-actuated temperature gauge has the stem, the Bourdon tube, and the capillary, and these three parts form one unit. The gauge has inert gas, and temperature changes cause internal pressure changes; the internal pressure changes the pressure through a measuring tube. This industrial temperature gauge has a scale range of -200 to +700°C.

6. What are the applications of industrial temperature gauges?

The industrial temperature gauge is important for maintaining a specific temperature. For maintaining the products to a particular temperature, it is crucial to maintain the accuracy of the industrial temperature gauge. You need to monitor the temperature for different applications. The purpose of the industrial temperature gauge is to indicate when the environment is too hot or too cold. The temperature gauge takes prevention action to avoid any damage to the device.

The industrial temperature gauge is suitable for various applications, including medical, agriculture, aerospace, motorsport, and HVAC. The specific sensor applications of industrial temperature gauges are motors, surface plates, computers, home appliances, computers, and warming electrical radiators.

The industrial temperature gauge applications play an important part include heating/cooling systems, power, utilities, drilling, heating/cooling system, laboratory, energy, etc. In addition, the industrial temperature gauge is also used widely in sanitary applications, food and beverages, pharmaceuticals, biotechnology, compressor constructors, and ovens.

7. What is the accuracy range of the industrial temperature gauge?

The industrial temperature gauge has various designs and features that provide excellent temperature measurements. For instance, the bi-thermal thermometer has a simple structure and measures thermal expansion. This industrial temperature gauge can measure a range from -50°C to 600°C. In addition, they have multiple entry combinations and provide high repeatability.

The liquid-filled industrial temperature gauge is suitable for measuring high-stress pressure points and mechanical vibrations. It has a small immersion length that is capable of sensing at 30 mm. The maximum temperature measuring range of liquid-filled temperature gauge is from -30°C to 250°C.

The latest industrial temperature gauges are digital thermometers that adopt new technology. They have alarm components, universal input, and are battery-powered.

8. How to calibrate an industrial temperature gauge?

In the process industry, measuring temperature is most important. The temperature gauge provides an accurate measurement. For ensuring accurate measurement, the industrial temperature gauge needs calibration regularly. The temperature gauge has an output signal that is proportional to the temperature. The change in temperature changes the output accordingly.

There are various kinds of industrial temperature gauges that provide different output signals. In industrial applications, the signal is connected to the temperature gauge to convert the signal into a readable format for longer distances.

For measuring output, you need to measure the device using voltage or resistance. It is important to know how to convert an electrical signal into a temperature value. There are international standards that state how to calculate temperature conversion.

9. What are the considerations while calibrating an industrial temperature gauge?

In industrial applications, you should calibrate the industrial temperature gauge regularly. There are different structures and mechanical technicalities of various industrial temperature gauges. Make sure that the industrial temperature gauge that you are calibrating is robust and withstands intense handling. The gauge structure should not be fragile; otherwise, you have to suffer damage to your equipment.

When there is a very fast temperature change, it can damage industrial temperature gauge measurement accuracy. Therefore, a visual inspection is very important before calibrating the industrial temperature gauge. In this way, you will make sure whether there is any damage. For calibrating the temperature sensor in an industrial temperature gauge, you need to have a temperature source.

For calibrating the industrial temperature gauge, a temperature dry-block is suitable. The temperature dry-block is portable and accurate. A liquid bath is applicable for high accuracy needs. It has an internal reference center that measures the temperature. The immersion depth is another important consideration while measuring the industrial temperature gauge.

10. What are the benefits of an industrial temperature gauge?

Temperature measurement is very important, and with a wide range of industrial temperature gauges in the market, it is crucial to choose the suitable thermometer for your needs to ensure accuracy. Temperature gauges are an important tool in industrial settings. In industries, there is a need for frequent temperature readings.

The industrial temperature gauge offers several benefits. Some of the benefits are as follows:

• First, industrial temperature gauges provide accurate readings.
• Measures internal temperature
• The industrial temperature gauge is portable, so you can easily carry and transport it.
• You can measure a range of temperatures for different applications.
• The industrial temperature gauge has a simple, accurate, and rugged structure.

11. What are the disadvantages of industrial temperature gauges?

Before purchasing the industrial temperature gauge, it is important to consider the drawbacks of each type of temperature gauge. The industrial temperature gauge is applicable from food to agriculture, with accurate temperature readings. First, however, we will discuss some of the disadvantages of the industrial temperature gauge.

• The industrial temperature gauge is less stable with small base resistance.
• The industrial temperature gauge is non-linear with low voltage.
• The industrial temperature gauge needs shielding power lines are passive.
• They have a fragile structure and are susceptible to self-heating errors.
• The industrial temperature gauge is not applicable for large temperature ranges.

12. How does a liquid or gas-filled temperature gauge measures temperature?

The industrial temperature gauge is a durable and reliable tool and depends on the type of sensor it uses. The sensor options can be bi-metal, liquid or gas-filled, infrared, or electronic.

The liquid or gas-filled thermometers use gas or liquid as the temperature sensor. The structure has a small-bore tube with a thin glass bulb at the lower end.

Mostly, the liquid-filled is mercury or alcohol. When heat is given to the substance, the column of liquid or gas pushes higher up the capillary where the temperature is indicated. Therefore, the number of parameters should be taken into account when choosing the liquid or gas-filled industrial temperature gauge.

Mercury is the standard material to fill the tubes. The tube has glass or metal material. Glass tube is more common, but a metal tube offers more rugged application. The stainless steel material is anti-corrosive and is best for mounting.

13. What is the construction of the industrial temperature gauge?

The industrial temperature gauge is a more rugged device than the glass thermometer. However, there are several industrial applications where it is essential to keep track of the changing temperature. For example, furnaces, ovens, gas grills, and water loops. In these applications, the user wants to know the approximate temperature.

The industrial temperature gauge has a metal sensing rod that conducts the temperature to the thermal element. The sensing element has a flat spring shaped like a metal element. The metallic components expand when the element senses a temperature. Different materials expand at different rates, which generate stress; this stress causes the element to wrap around itself. Here the indicator needle is attached to the end of this stress.

14. What is the accuracy and range of the industrial temperature gauge?

The industrial temperature gauge is highly accurate. It came in various sizes, accuracies, and temperature ranges. If the reading increment is smaller, the less will be the range. The accuracy of the industrial temperature gauge depends on the manufacturing process and its usage.

The pressure on the industrial temperature gauge can affect the readings. The industrial temperature gauge is usually accurate to one degree or so. Initially, the control systems in the industrial temperature gauge were simple switches. A simple switch has several applications.

15. What is the effectiveness of a digital display thermometer?

Digital display thermometer is the advanced industrial temperature gauge that is more innovative and superior in technology. The main features of the digital display thermometer include battery-powered, thermocouple input, alarm/relay, and user set display messaging. The indicator of the digital display thermometer shows the temperature in °C or °F on a 6-digit LCD.

The user has the option if he set the alarm within a temperature range. There is also an option of data logging to record up to 5000 points. The digital display thermometer has a stainless steel casing which is great for a rugged environment. It offers a dual relay that can be used with the alert to provide switching at user switching points.

16. What are the specifications of the industrial temperature gauge?

The industrial temperature gauge is applicable in various industries. The specifications of the industrial temperature gauge include dimensions, display material, stem adjustments, and operating environment. In addition, the industrial temperature gauge display characteristics include the Fahrenheit display, display range, and scale options, and the other display options include glass or plastic viewing windows, max/min readings, and Fahrenheit and Celsius options.

The display range of the industrial temperature gauge means the minimum and maximum values of temperature. They can measure temperatures between -200 to +700°C. You can use these industrial temperature gauges for various applications. The mercury-filled temperature gauge is suitable for accurate temperature measurement. It has a structure composed of bulbs, capillaries, and flats.

The industrial temperature gauge expansion type has 63mm, 100mm, and 150mm dials. It has a temperature range from -200 to 500°C. The stainless steel material of this industrial temperature gauge makes it anti-corrosive. These temperature gauges are applicable in petrochemical, chemical, food, and pharmaceutical.

17. What is the principle of operation of industrial temperature gauge?

When the temperature is measured using an industrial temperature gauge, it causes a kind of mechanical motion. This motion is caused because of the expansion of materials with a temperature rise. The industrial temperature gauge has been designed to use liquids, solids, and gases as temperature-sensitive materials. The liquid in the gas thermometer expands with the expansion of the liquid, moving up the tube.

Another common application of industrial temperature gauge is in air-conditioning thermostats where a bimetallic strip is used. When the temperature changes, the bimetallic strip bend and make contact with electrical leads which turn the air conditioning on and off.

The industrial temperature gauge has a spring that is made of two different metals. One of the metals can sustain low heat sensitivity, and the other one has high heat sensitivity. The heat results in the expansion of two metals, due to which pointer is deflected on the calibrated scale.

18. What is the role of temperature measurement in industrial temperature gauges?

Temperature is one of the most important parameters in various industries. Measuring and controlling the temperature is very important in food and manufacturing companies. While producing food in bulk, you need to monitor temperature continuously. In the beverage industry, temperature plays a crucial role in deciding the quality of the final product.

In winemaking and brewing, you have to maintain a specific temperature. The ambient temperature during the brewing process could have a positive or negative effect. Temperature maintenance also plays an important role in milk pasteurization and the removal of harmful pathogens.

Temperature measuring and maintenance are also an inevitable part of the plastic industry. For example, during the manufacturing or injection molding process, you need to monitor the temperature to ensure a high-quality product.

To achieve operational excellence in the metal process plant, temperature measurement plays a key role. If the temperature measurement is not correct, it affects the quality of the final product and endangers workplace security.

19. What are the dimensions of the industrial temperature gauge?

While purchasing the industrial temperature gauge, the users need to specify the dimensions and mounting options.

• The stem extension is an important dimension of the industrial temperature gauge. It has a thermal conductor that extends the bulb into the environment.
• The scale length is the readable face of the thermometer. It is the overall length of the industrial temperature gauge.
• The insertion portion is the total stem length that is immersed into the environment.
• The mounting options include duct mounts, tanks, and process line mounts.
• The industrial temperature gauge has the material of brass, aluminum, or stainless steel.
• There are adjustable angle stems that enable the stem of the gauge to be easily angled.
• The industrial temperature gauge is available in various scales that can be used for a variety of temperatures.
• If you want to maintain the high accuracy of the industrial temperature gauge, it is best not to show them to high levels of shocks and vibration.

20. What is the role of RTD in industrial temperature gauges? 

Resistance temperature detector (RTD) is the temperature sensor that changes the resistance value when there is a temperature change. It is the industrial temperature gauge that measures temperature in industrial setups and laboratories. It offers high accuracy and repeatability. The structure of the RTD consists of a coiled wire that is wrapping around the glass core.

The RTD is made from pure material that tends to change as the temperature changes. The pt 100 is the most accurate sensor that provides good stability and accuracy. This industrial temperature gauge is immune to electrical noise, perfect for temperature measurement in industrial applications. RTDs are useful in high-precision applications because of their high stability and repeatability.

Conclusion

An industrial temperature gauge is an important tool in industrial applications for measuring temperature from -200 to +700°C. These gauges are applicable in various industries, including sanitary, food, oven, laboratories, pharmaceuticals, gear, compressors, etc.

At Instruthink, we offer different ranges of industrial temperature gauges. Our teams of professionals are here to assist you in every possible way. You can email us at sales@instruthink.com in case of any queries. We manufacture high-quality and durable industrial temperature gauges to our customer’s specifications. In addition, our products are incredibly reliable to meet your company’s needs.