Temperature Instruments
Industrial thermometers can be selected based on measuring principle and application requirements. Common types include bimetal thermometers, gas-actuated thermometers, thermocouples, RTDs (Resistance Temperature Detectors), and temperature transmitters. Bimetal thermometers feature a simple and durable design, making them suitable for general industrial use and medium-temperature measurement, while gas-actuated thermometers are ideal for remote indication and temperature monitoring of large equipment. For high-temperature processes such as industrial furnaces and combustion systems, thermocouples are commonly used. RTDs provide excellent accuracy and stability, making them suitable for medium- to low-temperature process control and precision measurement. Temperature transmitters convert temperature signals into standard outputs such as 4–20 mA for remote transmission and system integration.
SJ Gauge specializes in industrial thermometers, temperature gauges, and related measurement instruments. Based on different operating conditions and installation requirements, we offer options such as threaded connections, sanitary clamp fittings, electrical contacts, thermowells, temperature probes, and smart temperature sensing elements. Whether for standard selection needs or specific industrial applications, SJ Gauge provides reliable temperature measurement products tailored to actual operating conditions.
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Thermocouples (4)
Thermocouple thermometers measure temperature based on the thermoelectric effect generated between two different metal materials. When there is a temperature difference between the two ends, a corresponding voltage signal is produced and then converted into a temperature reading, allowing the thermometer to respond quickly to changes in the process temperature. With the advantages of a wide measuring range and fast response time, thermocouples are widely used in high-temperature processes, industrial furnaces, combustion systems, and various types of industrial equipment for temperature monitoring. For applications that require continuous temperature monitoring, thermocouples are also a highly practical sensing solution. If higher measurement accuracy is required, calibration and proper model selection can be applied according to the application. If you have related requirements, please feel free to contact SJ Gauge. -
RTDs (2)
Resistance Temperature Detectors (RTDs), such as platinum resistance thermometers, measure temperature by utilizing the change in electrical resistance of metal (typically platinum) at different temperatures. These thermometers offer exceptional accuracy and stability, particularly within low to medium temperature ranges, and maintain their reliability over long-term use. They are widely used in scientific experiments and precision-controlled industrial processes. If you need more information on specific RTD models or require a customized solution for your application, please provide your specific requirements, and I can assist you further with product selection. -
Temperature transmitters (3)
Smart temperature transmitters are essential components in industrial automation, converting weak signals from RTD or Thermocouple (TC) sensors into standardized 4-20mA analog signals or HART digital communication. They offer exceptional flexibility, allowing users to configure measuring ranges and sensor types via software or handheld devices. Unlike traditional transmitters, the smart design features self-diagnostic functions, superior noise immunity, and high measurement accuracy, ensuring error-free, long-distance data transmission in complex industrial environments. -
Thermometers (12)
Industrial mechanical thermometers primarily include bimetal and expansion (capillary) types. Bimetal thermometers utilize the bending of bonded metal strips under heat to drive the pointer, offering a robust, power-free, and vibration-resistant design ideal for on-site process monitoring. In contrast, expansion thermometers use the thermal expansion of a medium to transmit pressure through a capillary tube, enabling "remote monitoring" in demanding environments—such as high-temperature, vibrating, or confined spaces—where direct access is difficult. Both types provide stable, intuitive, and accurate temperature data for a wide range of industrial applications. For more detailed information, please refer to this article: Types of Industrial Thermometers -
Thermowells / protection tubes (3)
Installing a thermowell (thermometer protection sleeve) extends the service life of the thermometer and prevents the sensor probe from corrosion. Once a thermowell is installed on mechanical equipment, the thermometer can be replaced without shutting down the system, eliminating the risk of medium leakage and ensuring an uninterrupted production process. Thermowells are widely used in chemical processing, industrial equipment, plant engineering, and the petrochemical industry. If you have any requirements for thermowells, accessories, or technical inquiries, please feel free to Contact Us. SJ Gauge is dedicated to providing you with professional and tailored solutions.