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Machine Mart

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  1. Asked: January 23, 2020In: Energy

    What are the functions of thermowell in temperature measurement?

    Machine Mart

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    Thermowells are one of the major temperature measurement accessories that are usually made of solid drilled bar stock and are designed to protect temperature sensors from wind, high pressure and harsh environments. A thermowell acts as a barrier between the sensor element of the measuring device andRead more

    Thermowells are one of the major temperature measurement accessories that are usually made of solid drilled bar stock and are designed to protect temperature sensors from wind, high pressure and harsh environments.

    A thermowell acts as a barrier between the sensor element of the measuring device and its process medium. It safeguards the temperature sensors such as thermocouples, thermistors and bimetal thermometers against corrosive process media, high-speed and pressurised images.

    It can also remove the sensing factor from the application while a closed system is retained. These also increase the sensor durability, allow sensor replacement without dripping out the device and reduce the likelihood of contamination.

    Thermowells are used for high-pressure applications which are typically machined from bar stock to retain integrity. A tube with one end welded can be built from smaller thermowell used in low-pressure environments.

    Thermowells are concealed in pipes and occasionally seen. They are permanently mounted in the tubes, tanks or in sumps in order to insert temperature measuring probes into the tube to measure the temperature of the contents. For installations,  seal, welding and brazing are necessary. The pipe thread provides mechanical strength, and the seal is formed by the weld or braze.

    Thermowells usually comes in various shapes. The installation of temperature sensors in or directly into thermowell includes some form of brass or stainless steel fitting.

    A wide variety of thread or flange fittings is available, depending on the installation specifications. Various unions, bayonet cap and the flange, are included in the fitting. An adjustable compression fitting is directly applied to the test to ensure proper shearing of the samples into the thermowells to achieve the required insert length during the process.

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  2. Asked: January 23, 2020In: Energy

    What are key components in resistance temperature detectors (RTD)?

    Machine Mart

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    Thermometer resistance uses metals which alter their electrical resistance when heated. The different materials used in the construction of RTDs provide a different relationship between resistance and temperature. Resistance temperature detectors (RTDs) is made of temperature-sensitive materials sucRead more

    Thermometer resistance uses metals which alter their electrical resistance when heated. The different materials used in the construction of RTDs provide a different relationship between resistance and temperature.

    Resistance temperature detectors (RTDs) is made of temperature-sensitive materials such as platinum nickel and copper whereas the most widely used materials for industrial RTD are platinum.

    In the working process of RTD, the bridged circuit can be used in such cases when the change in resistance value is very small in term of temperature.

    The constant electric current comes into the bridged circuit and voltage drops across the resistor are measured. This can also determine the temperature by using a calibration expression to convert the RTD resistance value.

    Main components of RTD

    RTD platinum resistance element

    This is the real RTD temperature control component. The range in length of the elements is from 1/8″ to 3″. There is also a range of types. The standard temperature coefficient is an alpha of .00385 and the standard resistance is 100 Ω at 0C.

    RTD outside diameter

    The most common outside diameter is 1/4 in the US or 6mm (.236″) for non-US applications. However, outside diameters range from .063″ to .500″

    RTD tubing material

    For assemblies up to 500 F, 316 stainless steel sheet is commonly used above 500 F it is advisable to use Inconel 600.

    RTD process Connection

    All regular fittings used with thermocouples such as compression, welded or spring-loaded are included in process attachment fittings.

    RTD wire configuration

    RTDs are available in 2, 3 and 4 wire configurations. For industrial applications, 3 wire configurations are the most common. The standard wire insulation materials are Teflon and Fiberglass. The Teflon is resistant to moisture and can be used up to 400F whereas Up to 1000 F may be used with Fiberglass.

    RTD cold end termination

    RTDs can be ended on a cold end with plugs, bare wires, terminal heads and any thermocouple reference joints.

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  3. Asked: January 23, 2020In: Energy

    What is the global Pyrometer market size?

    Machine Mart

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    Global pyrometer market size The global pyrometer market size is expected to reach approximately US $ 850 million by 2025 from US$ 325 million in 2018. Analysis of the pyrometer market The growth of the pyrometer market is driven by the increasing automation of the industrial sector and the growingRead more

    Global pyrometer market size

    The global pyrometer market size is expected to reach approximately US $ 850 million by 2025 from US$ 325 million in 2018.

    Analysis of the pyrometer market

    The growth of the pyrometer market is driven by the increasing automation of the industrial sector and the growing demand for temperature measuring devices in industries such as glass, welding and ceramics.

    In the aforementioned industries, the devices used shall be efficient and robust even in harsh environments for precise operations, and pyrometer should be one such instrument.

    The growth in the use of pyrometers in boilers, furnaces and temperature-controlled areas are among the market drivers. Another growing application for the pyrometer market is in the petrochemical industry. The non-contact potential of the temperature measurement is an important motive for the pyrometer market because it provides easy use and long lifespan.

    Apart from this, the technological advancements in temperature monitoring and the increased use of remote control monitoring equipment that contributes to safety in high-temperature applications drives pyrometer market growth.

    However, one of the constraints that the pyrometer industry will face is the accuracy which is easily impaired by air, smoke and high equipment costs.

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  4. Asked: January 17, 2020In: Information Technology, Telecommunications

    What is the difference between sensor and transducer?

    Machine Mart

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    Added an answer on January 17, 2020 at

    These instruments are used in a wide variety of electrical and electronic equipment. But people can't make a difference between the sensor and the transducer because sometimes transducers are found in sensors. The key difference between sensor and transducer are the following: The sensor detects theRead more

    These instruments are used in a wide variety of electrical and electronic equipment. But people can’t make a difference between the sensor and the transducer because sometimes transducers are found in sensors.

    The key difference between sensor and transducer are the following:

    • The sensor detects the physical changes in the form of specific quantities. On the other side, a transducer is used to turn one particular kind of energy into another form.
    • For the sake of sensing and processing, the sensor does not have any other component, but for a transducer, a sensor and signal conditioning device is used.
    • The primary function of the sensor is to sensitize physical changes in the environment, but a transducer is used to translate physical quantities into electric signals.
    • The sensor is by its own, whereas signal conditioning and sensor can be a part of a transducer.
    • A sensor cannot be a transducer, but a sensor is always included in the transducer.
    • A sensor is less complex in performance compared to a transducer. It converts a given amount into a different physical quantity directly, such as resistance or capacitance. On the other side, a transducer is a more complex tool because it is designed to convert the actual quantity supplied to the input component into a specific output signal such as voltage or current. Therefore, the conditioning mechanism and sensing components are fused by a transducer to provide output signals that are proportional to input quantities.
    • A sensor tests only a measurable quantity and cannot alone provide data to the desired device. But a transducer is capable of transferring energy into different forms. It is used to provide feedback via the output device to the desired system until proper processing in the signal conditioning unit takes place.
    • Sensor examples include a barometer, gyroscope and accelerometer, whereas the examples for transducers are thermocouple, thermistor and antennas.
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  5. Asked: January 12, 2020In: Energy

    What are servo motors?

    Machine Mart

    Machine Mart

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    Added an answer on January 12, 2020 at

    Servo motor is also called servos. They are rotary actuators devices for accurate speed control, torque and angular position. It has some capabilities that a standard motor does not have as it moves the different parts of the machine with high efficiency and with great precision. A signal (data) betRead more

    Servo motor is also called servos. They are rotary actuators devices for accurate speed control, torque and angular position. It has some capabilities that a standard motor does not have as it moves the different parts of the machine with high efficiency and with great precision. A signal (data) better known as the pulse-width modulator (PWM) controls the servo motor.

    The servo consists essentially of a motor (AC or DC), a gear system, a position sensor and a circuit control. In the case of DC motors, the motor is powered by a battery source which results to run the motor at high speed and low torque. The gear and shaft connected to the DC motors lower this rate to higher torque and speed.

    The position sensor senses the shaft position and feeds the information to the control circuit. The control circuit thus decodes the signal from its position sensor and compares the current position of the motors to the desired position and therefore determines the rotational direction of the DC motor to achieve the correct position. In general, the Servo motor requires a 4.8V to 6 V DC supply.

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  6. Asked: January 12, 2020In: Energy

    What is the global induction motors market size?

    Machine Mart

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    The global induction motor market was US$ 14 billion in 2018 is expected to reach US$ 24 billion by the end of 2025. The global induction motors market is boosted by its advantages over other types of electric motors. Several features in induction motors have made them attractive such as higher reliRead more

    The global induction motor market was US$ 14 billion in 2018 is expected to reach US$ 24 billion by the end of 2025.

    The global induction motors market is boosted by its advantages over other types of electric motors. Several features in induction motors have made them attractive such as higher reliability, lighter weight and lower maintenance after sales which promote global growth in induction motors. The global induction motor market is likely to experience considerable growth due to the increasing demand for induction motors, primarily from the automotive industry, as well as rapid industrialisation in emerging countries.

    The new technological advancement trends power the global market for induction motors and give substantial growth opportunities to companies that are operating in the global induction motor market. Copper rotor induction motor is one of the new technologies that are gaining momentum in the global induction motor market. This motor is a powerful alternative to the permanent magnet motor in electric vehicles. In addition, the transformation to industrial automation combined with rising consumer confidence and promising investment plans support the demand for the induction motor in industrial applications.

    Moreover, the growing environmental awareness also had a positive effect on induction motors, driving market growth. This encourages both consumers and manufacturers to go for induction motors over other types of motors by means of government policies to support the environment.

    Additionally, induction motors are capable of operating under various weather conditions. Their maintenance and repair costs are also low and are expected to promote the future global motor induction market development further. Induction motors are used for several industries such as vehicles, textiles, oil and gas. This also helps to increase the induction motor market in the next few years.

    The market is highly fragmented with intense competition between local and international suppliers. Some major vendors find it difficult to deal with low-cost Chinese manufacturers. The market has become even competitive due to the low entry obstacle.

    Due to the economic downturn, many players in the market have lowered the prices to increase sales. While on the other side, the increasing raw materials prices influence profit margins and pricing strategies of manufacturers. Price volatility is so high in the key raw materials such as steel, aluminium and copper that it is impacting their operating costs.

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  7. Asked: January 12, 2020In: Energy

    What is the global brushless DC motor market size?

    Machine Mart

    Machine Mart

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    The global brushless DC motors market size is US$ 9 billion in 2018, and it is expected to reach US$ 19 billion by the end of 2025. The global market for brushless DC motors is increasing due to the rising demand for brushless DC motors in pulp and paper, chemical, marine, semiconductor, food, aerosRead more

    The global brushless DC motors market size is US$ 9 billion in 2018, and it is expected to reach US$ 19 billion by the end of 2025.

    The global market for brushless DC motors is increasing due to the rising demand for brushless DC motors in pulp and paper, chemical, marine, semiconductor, food, aerospace, electronics industries etc.

    The growth of brushless DC motors as a traction motor in electric vehicles is increasing due to decreased demand from heating, ventilation, and air conditioning (HVAC) application. Additionally, the high cost for brushed DC motor and the move towards energy-efficient machinery have a positive effect on market growth.

    The hydraulic system is replaced with the electric system by the brushless DC motor in the automotive industry, especially for the application in steering boxes.
    For instance, the brushless DC motors market has seen a tectonic wave as its advantages over other motors have been various.

    In comparison to brushed DC motors, brushless DC motors require lower maintenance, triggering demand globally. Brushless DC motors operate effectively at all speeds, offer a greater range of speed, reduced dimensions with better thermal features and less electric noise generation compared to other motors. They provide high efficiency, as these motors can be operated with maximum rotary power. The brushless DC motors are capable of delivering an enormous amount of torque at a fast rate. These advantages of brushless DC motors will lead to market growth.

    The adoption of the brushless DC type sensor-less controls would improve product efficiency and longevity, reducing the number of electric contacts and mechanical misalignments. Major players around the world have begun developing advanced motors offering high energy efficiency. This is further projected in the near future to generate growth opportunities for the industry. Furthermore, the rising developments in industrial robotics would give additional growth opportunities to the brushless DC electric motor market.

    However, the use of sensors in the BLDC motor increases the price of brushless DC motors. This is a major limiting factor for the expansion of the worldwide market. Furthermore, the low-quality availability of expensive brushless DC motors in the grey market can negatively impact the growth of the global brushless DC motor market.

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  8. Asked: January 7, 2020In: Defense & Security, Transport

    What is the global underwater robot market size?

    Machine Mart

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    Underwater Robotics are used for various purposes, such as ocean exploration and extractions. There is a rise of using robotics in the subsea oil and gas facilities, and the extractions of minerals. Moreover, the growing research and development activities and awareness of the availability of advancRead more

    Underwater Robotics are used for various purposes, such as ocean exploration and extractions. There is a rise of using robotics in the subsea oil and gas facilities, and the extractions of minerals.

    Moreover, the growing research and development activities and awareness of the availability of advanced imaging systems can be used in low depths and can trace enemy ships.

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  9. Asked: January 7, 2020In: Defense & Security

    What is the global market size of military radar system?

    Machine Mart

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    The global military radar market size was US$12 billion in 2018 and will reach US$16 billion by 2025. The development of new radar systems in line with the changing defence industry requirements also resulted in increased use of military radar systems. The increasing importance of advanced technologRead more

    The global military radar market size was US$12 billion in 2018 and will reach US$16 billion by 2025.

    The development of new radar systems in line with the changing defence industry requirements also resulted in increased use of military radar systems. The increasing importance of advanced technology and the modernisation of existing military radar systems are expected to drive demand for radars.

    The need for modern military equipment like RADAR Systems is growing. The demand for new military radars around the globe is driven by the progress made in range, detection, identification and integration into other sensors and adaptability to new missions, platforms and environments.

    A major impetus for a global military radar market is the introduction of advanced technological radar systems such as Active Electronically Scanned Array (AESA) in conjunction with evolving warfare tactics. In modern combat vehicles, aircraft and naval ships the military radar systems play a crucial role. The need to deploy military vehicles and aircraft with advanced radar capabilities also rises with the rise in disputes.

    The growing use of drones, advanced ballistic missiles and electronic warfare systems, many countries in Asia and the Middle East have been forced to improve their radar capability. The increasing demand for military radars to guide missile systems is expected to boost demand for military radar systems in the coming years.

    The high-resolution imaging radars are also necessary for the detection of fixed and moving targets in the combat area to boost the market growth of the military radar industry. Commercial radars are also used to avoid aircraft collisions.

    The demand for radar has grown from a hazard indicator to an active safety system. The improvements in radar technology have contributed to the development of systems.

    The integration of technology into modern military systems has strengthened the role of radar in war, including application radar areas such as surveillance and reconnaissance (C4ISR), Air Defence Systems and Electronic Warfare (EW). The investing in these interconnected systems helps to improve the morale of the troops and increase the country’s deterrence.

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