Explosion Proof Temperature Sensor For Hazardous Areas

by
Explosion Proof Temperature Sensor For Hazardous Areas

In explosive and flammable industrial environments, safety and operational efficiency are paramount. Temperature monitoring is not only a routine operation but also the cornerstone of safe production. Therefore, explosion-proof temperature sensors are a core component in this field.

Explosion Proof Temperature Sensors offer extremely high accuracy and reliability. They are suitable for industries such as oil and gas, chemical processing, mining, and power generation. They protect personnel and assets while meeting safety standards.

RFQ

Know about explosion proof temperature sensors

Explosion-proof temperature sensors are temperature sensors with explosion-proof performance. They are designed for use in potentially explosive and flammable environments. Unlike traditional sensors, they have a sturdy fireproof casing. They effectively contain potential internal explosions, preventing them from igniting the surrounding environment.

Our Sino-Inst explosion-proof temperature sensors are designed as resistance thermometers or thermocouples. They are used to measure the temperature of liquids, gases, and solids. They are widely used in traditional industries. Such as the chemical industry, food industry, and crude oil and natural gas extraction.

Explosion-proof armored thermocouple

Advantages

  1. Outstanding Explosion-Proof Performance
    Explosion-proof temperature sensors utilize special explosion-proof designs (such as flameproof and intrinsically safe). This prevents them from generating ignition sources such as sparks and high temperatures.
  2. Adaptable to Harsh Environments
    Explosion-proof temperature sensors can operate in environments with high and low temperatures, vibration, and other conditions.
  3. Accurate and Reliable Temperature Measurement
    Explosion-proof temperature sensors offer high-precision temperature measurement capabilities. They provide real-time, accurate feedback on ambient or device temperatures.
  4. Compliance with Industry Standards
    Strictly adhere to national and international explosion-proof standards (such as Ex certification). They meet the safety regulations of industries such as the petroleum, chemical, and coal mining industries.
  5. Extended Equipment Life
    The sensors themselves are rugged, wear-resistant, and age-resistant. They can operate stably and long-term in harsh environments.

Featured explosion-proof temperature sensors

Industrial thermoresistors serve as temperature measurement sensors. They can be used to measure and regulate the temperatures of liquids, vapors, gases within the range of -200 to 650℃, as well as the surfaces of solids. With corrosion-resistant protective tubes, they can also be applied in corrosive media.

Working Principle

Industrial thermal resistors are made by welding two conductors or semiconductors of different materials together. This creates a closed circuit. When a temperature difference exists between the two points, an electromotive force is generated between them. This generates a current in the circuit. This phenomenon is known as the thermoelectric effect.

Features

  • Uses a compression spring-type temperature sensing element. Excellent vibration resistance.
  • Thermocouples offer high measurement accuracy.
    • They can directly contact the object being measured, unaffected by the intervening medium.
  • They offer a wide measurement range.
    • Common RTDs have a measurement range of -50°C to +1600°C.
    • Certain specialized RTDs can measure temperatures as low as -269°C (such as gold, iron, nickel, and chromium) and as high as +2800°C (such as tungsten and rhenium).
  • They have a simple construction and are easy to use.
    • RTDs are typically composed of two different metal wires and are not limited by size or thickness. They are protected by a protective sleeve, making them very convenient to use.

Industrial Sheathed Thermocouples are temperature sensors. They are primarily used to measure the surface or internal temperature of gases, liquids, and solids. The temperature range is up to 0-1300°C.

Armored thermocouples can be used with digital instruments, PLCs, data loggers, and other devices. They are widely used in industries such as metallurgy, petroleum, and chemicals. They can also serve as temperature sensing elements in assembled thermocouples.

Working Principle

Armored thermocouples are made by welding two different metal conductors together to form a closed circuit. They detect the thermoelectric potential generated by a temperature difference to measure temperature.

If the other end is considered the reference end, the temperature at this end remains constant. The end directly measuring the temperature is called the measuring end. When a temperature difference exists between the measuring end and the reference end, a thermoelectric potential corresponding to the temperature is generated in the circuit.

The thermoelectric potential generated by a thermocouple depends solely on the thermocouple material and the temperature difference between the two ends, and is independent of the thermocouple length or diameter. 

Features

  • Armored thermocouples utilize a metal sheathed structure.
  • Armored thermocouples offer excellent pressure resistance, up to 40 bar.
  • It supports curved installation. They have a fast thermal response time.
  • A sheathed thermocouple typically measures the surface or internal temperature of gases, liquids, vapors, and solids within a range of 0 to 1300°C.

Digital temperature transmitters support 4-20mA current output. They are compatible with thermocouples, RTDs, and thermistor sensors. They offer a high load capacity. And they can directly measure the temperature of liquids, steam, gases, and solid surfaces within the -200°C to 1300°C range. They are typically used with display instruments, recording instruments, and computers.

Our 4-20mA temperature transmitters can be configured with PT100, K-type, N-type, and J-type thermocouples. They are suitable for use in harsh environments. Explosion-proof versions include EXdⅡBT4, dⅡCT5, and dⅡCT6. Intrinsically safe versions include EXiaⅡCT6.

Working Principle

A thermocouple or RTD sensor converts the measured temperature into an electrical signal. This signal is then fed into the transmitter’s input network. This transmitter’s input network includes circuitry such as zero adjustment and thermocouple compensation.

The zero-adjusted signal is then fed into an operational amplifier for amplification. The amplified signal is processed by a converter and output as a 4-20mA DC current. Another signal is processed by an A/D converter and displayed on a meter.

Features

  • Silicone rubber or epoxy resin seal.
  • Field-mounted in the junction box of a thermocouple or RTD. Directly outputs 4-20mA and 0-10mA signals.
  • The thermocouple transmitter features automatic cold junction temperature compensation.
  • High accuracy, low power consumption, and wide operating temperature range.

Digital Display 4-20mA Temperature Transmitter
Industrial Thermal Resistances
Industrial Thermal Resistances
2~12 Points-Customized Multipoint Thermocouple
2~12 Points-Customized Multipoint Thermocouple
Industrial Sheathed Thermocouples | K Type
Industrial Assembled Thermocouples
Industrial Assembled Thermocouples

Applications

Explosion-proof temperature sensors can be widely used in various industries.

Explosion-proof temperature sensor with digital display

Petrochemical industry.
Explosion-proof temperature sensors can be used to monitor temperatures at wellheads, oil pipelines, oil storage tanks, and other locations.

Coal and mining industries.
In crushing and grinding processes, they can monitor equipment and material temperatures.

Metallurgy and metal processing.
Explosion-proof temperature sensors can measure the surface temperature of media or equipment in high-temperature environments.

Gas stations.
Explosion-proof temperature sensors can monitor ambient and equipment temperatures. This can ensure the safety of refueling operations

Precautions for using explosion-proof temperature sensors

Precautions 
Explosion-proof level and environmentAccording to the hazard level and temperature group of the place of use. You can choose the corresponding explosion-proof type.
Pre-installation inspection and certificationCheck the sensor housing, wiring ports, seals, and other components for integrity.
Confirm that the sensor has explosion-proof certification from a recognized agency.
Regular maintenance and inspectionCheck the sensor housing for damage or rust. Ensure the explosion-proof surface is clean (free of oil, dirt, or dust).
Check the wiring port seal for signs of aging or hardening. If it loses its elasticity, replace it with a similar-sized explosion-proof seal.
Avoid using beyond the scopeStrictly adhere to the rated parameters of the sensor.
Personnel qualifications and trainingInstallation, operation, and maintenance personnel must receive explosion-proof training.
They must be familiar with the equipment’s explosion-proof principles and safety precautions.

More Temperature Measurement Solutions

RTDs are mostly made of pure metal. Platinum and copper are the most widely used. Nickel, manganese, and rhodium are also being used in RTD manufacturing. Sino-Inst manufactures and supplies a variety of industrial RTDs, primarily the PT100 type.

Armored thermocouples are a new generation of temperature sensors. They are widely used in industries such as metallurgy, petroleum, chemicals, and power generation. They can also serve as the temperature-sensing element for assembled thermocouples.

Temperature transmitters convert temperature changes into a 4-20mA output signal. Our Sino-Inst 4-20mA temperature transmitters are available with PT100, K-type, N-type, and J-type thermocouples.

Sino-Inst offers over 50 industrial temperature sensors and transmitters. These include RTDs, thermocouples, and PT100s, and are also available with a 4-20mA output. If you need to purchase explosion-proof temperature sensors or have any questions, please feel free to contact us.

    Request For Quote