SJ Gauge industrial thermometers for temperature measurement

Thermometers

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

Thermometers FAQ

Questions for bimetal, expansion, capillary, digital, and contact thermometers used in industrial applications.

How do I choose between bimetal and expansion thermometers?
Bimetal thermometers are simple, durable, and suitable for on-site indication. Expansion or capillary thermometers are useful when the display must be away from the measuring point, such as high-temperature, vibrating, or hard-to-access equipment.
When should a thermometer include an alarm contact?
Choose an alarm or electrical contact thermometer when temperature indication must also trigger a warning, control signal, or equipment action. This is useful for machinery, vessels, boilers, and process equipment.
What thermometer is suitable for remote reading?
Capillary expansion thermometers and twin-temperature thermometers with output signals can support remote observation. The correct model depends on capillary length, temperature range, signal output, and installation environment.
Can mechanical thermometers be used in harsh industrial environments?
Yes, but the case material, stem material, thermowell, vibration condition, temperature range, and process connection must be matched to the application. Stainless steel and thermowells are commonly used for higher durability.
  • SJ Gauge large industrial thermometer with back-entry stem connection
    Model: MTB.S_BL

    Bimetallic Thermometer, Back Mount

    • Stainless steel material, sturdy and durable​
    • Used in food and air conditioning industries, etc.
  • SJ Gauge large industrial thermometer with bottom stem connection
    Model: MTB.S_BS

    Bimetallic Thermometer, Bottom Mount

    • Fixed angle, if you need to adjust the observing angle, you can refer to MTB.S_BA
    • Suitable for applications in measuring industry, food industry and sewage treatment
  • Large view of SJ Gauge adjustable-angle industrial thermometer
    Model: MTB.S_BA

    Bimetallic Thermometer, Adjustable Angle

    • Adjust vertical angle 90°, suitable for observing from multiple angles
    • Used in chemical and petrochemical industries, etc.
  • SJ Gauge industrial expansion thermometer with gas-actuated sensing system
    Model: MTG

    Expansion Thermometer, Gas-actuated

    • Fast measuring reaction
    • Measuring range can be adjusted up to 600°C
    • Used in chemical and petrochemical industries, etc.
  • SJ Gauge gas-actuated expansion thermometer with electrical alarm contact
    Model: MTG-E

    Expansion Thermometer, Alarm Contact

    • Thermometer with magnetic snap-action contact available for automated control
    • Used in machine building, factory, and vessel construction
  • SJ Gauge industrial expansion thermometer with remote capillary sensor
    Model: MTR.S

    Expansion Thermometer, Capillary

    • Capillary length can be adjusted on demand for remote observation
    • Made of stainless steel, measures temperatures up to 700°C
  • SJ Gauge capillary expansion thermometer with alarm contact
    Model: MTR.S-E

    Expansion Thermometer, Warning/Alarm Contact and Capillary

    • Can measure the temperature devices with electrical contacts
    • Length of the capillary can be adjusted on demand for remote observation
    • If you do not need the contact function, please refer to MTR.S
  • SJ Gauge digital temperature gauge with LCD display
    Model: DTHD

    Digital Thermometer, LCD Display

    • Digital LCD thermometer allows displaying on-site temperature instantly
    • Digital thermometer with clear and easy-to-read, 4-digit LCD display screen
  • SJ Gauge Twin-Temp thermometer for high-temperature measurement
    Model: DTHIT

    Twin-Temperature Thermometer

    • K-TYPE, PT100Ω or 4~20mA signal output for remote observation
    • Made of stainless steel, resistant to high temperatures up to 600°C
    • Suitable for remote monitoring and automatic control
  • SJ Gauge industrial glass tube thermometer with protective housing
    Model: DET

    Glass Tube Thermometer with Metal Housing

    • Industrial metal sleeve, sturdy and durable
    • Suitable in boilers, air conditioners, diesel engines and other equipment
  • SJ Gauge V-line glass alcohol thermometer with rotatable metal casing
    Model: GLT

    Industrial 9″ Thermometer with Rotatable Casing

    • Adjust horizontal and vertical angle 180°
    • Intuitive interface for easy operation, but still durable
    • Widely specified in the industrial and commercial plumbing trade
  • Large product view of SJ Gauge magnetic surface bimetallic thermometer
    Model: MTM

    Bimetallic Thermometer, Magnetic Surface

    • Magnet thermometers are simple to operate and can directly measure the temperature
    • Suitable for measuring the temperature of magnetic metal surfaces
    • ​Used in mold, plastic injection, and other industrial applications