Your Professional A Bimetallic Thermometer Supplier
Jiangsu Zhaolong Electric Co., Ltd., located on Zhangguo Chang'an Road, Dainan Town, Xinghua City, Taizhou City, Jiangsu Province, is a high-tech enterprise specializing in the production and R&D of switches, temperature sensors, and temperature control instruments.It has applications across the entire spectrum, including steel, chemical, various machinery and equipment, environmental protection, petroleum, industrial furnaces, ovens, heating and refrigeration equipment, etc.
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Universal Bimetallic ThermometerThe product is designed for on-site temperature reading where installation angles are challenging. Its core advantage lies in the adjustable universal joint connecting the dial head to the stem,...view more
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Bimetallic Thermometer with Electrical ContactThe Bimetallic Thermometer with Electrical Contact merges the reliability of mechanical temperature indication with a built-in alarm function.view more
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Remote Transmission Bimetallic ThermometerThe Remote Transmission Bimetallic Thermometer solves the challenge of needing both a local gauge and remote data access. It combines a traditional, easy-to-read bimetallic dial with an integrated...view more
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Shock-resistant Bimetallic ThermometerThe Shock-Resistant Bimetallic Thermometer is engineered specifically for environments where constant vibration renders standard gauges unreadable.view more
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304 Stainless Steel Bimetallic ThermometerThe 304 Stainless Steel Bimetallic Thermometer is defined by its complete construction from corrosion-resistant 304 stainless steel, encompassing the stem, case, and internal components.view more
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Radial ThermometerThe Radial Digital Bimetallic Thermometer features a unique radial configuration where the digital display head is mounted at a 90-degree angle to the sensing stem.view more
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Axial ThermometerThe Axial Digital Bimetallic Thermometer is designed with the digital display head in direct alignment with the sensing stem, providing a clear, front-facing reading plane.view more
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Radial Flexible Tube ThermometerThe product revolutionizes installation in complex machinery by replacing a rigid stem with a flexible metal hose. This hose, typically made of stainless steel, can be bent and routed around...view more
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Axial Flexible Tube ThermometerThe Axial Flexible Tube Thermometer merges the installation versatility of a flexible metal hose with the optimal viewing angle of an axial-mounted display.view more
Why Choose Us
Our Certificate
Our products are ISO9001:2008 and CE certified, ensuring reliable quality and compliance with international standards.
Global Market Support
We actively serve both domestic and international customers through efficient logistics, e-commerce, and professional export services.
Advanced Production Equipment
Equipped with advanced manufacturing and testing equipment, including laser welding machines, CNC lathes, automatic thermocouple production lines, oscilloscopes, semiconductor testers, and wave soldering lines, we ensure high production efficiency, precise manufacturing, and strict quality control throughout the entire production process.
Fast Response & Reliable Support
We offer one-on-one professional consultation to provide tailored solutions based on customer requirements. During production, we strictly control quality and delivery schedules while providing real-time order updates. Our comprehensive after-sales support ensures fast response times and long-term reliable cooperation.
Advantages of A Bimetallic Thermometer
Durability
Bimetal thermometers are highly durable and can withstand harsh environments. They are resistant to mechanical stress, making them ideal for industrial applications where reliability is crucial.
01
No Need for Power
Unlike electronic thermometers, bimetallic thermometers do not require batteries or external power sources. This makes them ideal for situations where a power supply is unavailable or unreliable.
02
Wide Temperature Range
Bimetal thermometers can measure temperatures ranging from -50°C to 500°C, making them suitable for a wide range of industrial and commercial applications.
03
Simple Design
The simple mechanical design of bimetal thermometers means that they are easy to use and maintain. There are fewer parts that could fail, reducing the likelihood of malfunctions.
04
Cost-Effective
Due to their simplicity and lack of complex electronic components, bimetal thermometers are often more affordable than digital or electronic thermometers.
05
Types of A Bimetallic Thermometer
Spiral Type Bimetallic Thermometer
The designing of this thermometer can be done by wrapping the bimetallic strip into this thermometer. The inside of the spiral can be connected in the direction of the housing, and a pointer can be connected to the outside of the spiral. The temperature which is measured can be read off a standardized scale.
Helical Type Bimetallic Thermometer
In many situations, it is essential to detach the pointer from the bimetallic coil. The temperature sensor must be placed in the pipe and the temperature can be displayed at the outside of the pipe.

Specification
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Dial Size |
2", Aluminum material |
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Case |
SS 304 stainless steel |
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Lens |
Glass standard |
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Bezel |
SS 304 stainless steel,with flange |
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Pointer |
Aluminum, painted black |
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Stem OD |
6.35mm |
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Stem Length |
Customized |
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Thread |
3/8-24UNF |
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Accuracy |
+/-1.5% full scale standard; +/-1% full Scale Available |
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Range |
0 C/550 C (customized) |
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Packaging |
Shakeproof |
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Enclosure Rating |
IP65 |
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Field |
Pipeline,surface,industrial,oil,chemical,power station,marine,etc. |
Operating Principle of A Bimetallic Thermometer
A Bimetallic Thermometer work on the principle that solids expand or contracts depending on the temperature. As the name implies, these temperature measurement devices contain two strips of metal, each with a different expansion coefficient. This means that at the same temperature, the two metals will expand or contract at different rates. The materials are usually steel and copper or steel and brass, depending on the measuring range.
The two strips are welded or bonded together, formed into a helical or spiral coil, and placed in the thermometer’s stem. The bimetallic coil is affixed at the stem end, while the other end rotates and moves the pointer. As the temperature increases, the strip bends toward the metal with the lower temperature coefficient and creates a rotational movement in one direction. Conversely, as the temperature decreases, the strip bends toward the metal with the higher temperature coefficient and creates a rotational movement in the other direction.
Application of A Bimetallic Thermometer
Temperature Control Systems
These thermometers are often used to control heating and cooling devices. They can automatically switch systems on or off when a set temperature is reached.
Air Conditioning and Refrigeration
Bimetallic thermometers help monitor and regulate temperature in air conditioners, refrigerators, and freezers. They are commonly used in thermostats to maintain desired temperature ranges, such as −20 °C in freezers or 2–8 °C in refrigerators.
Industrial Applications
In industries, these thermometers are used to monitor and control temperature in processes like oil refining, plastic molding, metal heating, and soldering. Helical-type thermometers are especially preferred, as they can measure higher temperatures, often up to 500 °C or more, and provide better accuracy.
Temperature Measurement and Indication
They are also used to measure and display temperature in liquids, gases, and solid surfaces. Common examples include measuring water temperature in pipelines, monitoring engine surfaces, and checking temperatures in boilers or storage tanks.
Transportation

FAQ
We're well-known as one of the leading a bimetallic thermometer manufacturers and suppliers in China, featured by quality products and low price. Please feel free to buy customized a bimetallic thermometer made in China here from our factory. Contact us for more details.
pointer thermometer, Bimetallic Thermometer with Electrical Contact, calibrating a bimetallic thermometer