China China Bimetallic Thermometer - Reliable Back Connection Steel Temperature Measurement | Factory Direct Suppliers Manufacturer, Supplier

The bimetallic thermometer, also known as a bi-metal thermometer, is an essential instrument for precise temperature measurement across various industrial applications. This innovative device combines affordability and low maintenance with easy installation, operation, and calibration, making it an ideal choice for users worldwide, including those sourcing from China, These thermometers operate on the principle that solids expand or contract with temperature changes, utilizing two cold-welded metal strips that exhibit different thermal expansion coefficients. Commonly made from materials such as steel and copper or steel and brass, these strips are designed to react quickly to temperature variations, In manufacturing, the bimetallic thermometer is expertly crafted by reputable suppliers and factories, ensuring high performance and durability. The two metal strips are bonded together and shaped into a helical or spiral coil, which is then placed in the thermometer's stem. This design allows for accurate temperature readings, as the strip's bending causes a rotational movement of the pointer, indicating the temperature on the dial, Whether in industrial processes or environmental monitoring, the bimetallic thermometer provides stable and reliable temperature monitoring, making it an indispensable tool in diverse operational settings. Trust in quality thermometers supplied by leading factories in China for your temperature measurement needs

Product Description

Product Specifications
Case Stainless steel
Size 50mm (2"), 60mm (2.5"), 75mm (3"), 100mm (4"), 125mm (5"), 150mm (6")
Ring (Cover) Stainless steel, in crimping type or bayonet type
Window Toughened glass / Polycarbonate
Pointer Aluminum Alloy, Black Finished, Zero-adjustable
Dial Aluminum alloy in white background, can be in customize brand logo
Connection SS304 (or SS316 as per request). Back connection mounting
Thread 1/4", 3/8", 1/2"; PT(BSPT, ZG), BSP(G, PF), NPT etc as per request
Sensing Element Bi-metallic coil
Accuracy Class 1.6 as per EN 13190 (as standard), maximum 1.0
Over Pressure Limit 110% of full scale value
Ambient Temperature -25°C to +65°C
Process Temperature Max. 400°C
Stem Material Stainless steel 304 (SS316 as per request)
Stem Bulb Diameter 6mm or 8mm; length from 50mm to 500mm
Protection IP65
Package Neural shake-proof package
Key Features
  • Compliance to EN 13190 standard
  • 🎨 Customized & OEM dial design
  • 💰 Low price and low maintenance
  • 🔧 Easy onsite calibration (zero-point resetting)
  • 📈 Near-linear response to temperature changes
  • 🌡️ Suitable for a wide temperature range, from −94°F to 1,112°F (−70°C to +600°C)
  • 🏗️ Robust design, suitable for high-vibration applications
  • No need for wiring or power source, for easy installation, operation, and maintenance
Applications
🏭 Some industries where bimetallic temperature gauges are used are:
  • Heating, ventilation, and air handling, including hot water tanks and solar thermal systems
  • Industrial refrigeration
  • Machine building
  • Testing and laboratories
  • Water and wastewater treatment
Frequently Asked Questions (FAQ)
What is a bimetallic temperature gauge and how does it work?
A bimetallic temperature gauge measures temperature using a bi-metallic coil as its sensing element. The coil is made of two different metals bonded together that expand at different rates when heated. This differential expansion causes the coil to bend or rotate, moving the pointer on the dial to indicate the current temperature — all without any electrical power.
What temperature range can this bimetallic gauge handle?
This bimetallic temperature gauge supports a wide process temperature range up to a maximum of 400°C, with an ambient operating temperature of -25°C to +65°C. The sensing element itself is capable of measuring from −70°C to +600°C (−94°F to 1,112°F).
Does the bimetallic thermometer require any external power supply or wiring?
No. One of the key advantages of a bimetallic temperature gauge is that it requires no wiring or external power source. It operates purely on the mechanical principle of differential metal expansion, making it ideal for simple installation and long-term, maintenance-free operation.
Can the dial be customized with custom branding?
Yes. The aluminum alloy dial with white background supports full OEM and custom branding. Custom scale ranges or other design specifications can be printed directly on the dial.
What thread and connection options are available?
The gauge supports multiple thread standards including 1/4", 3/8", and 1/2" sizes, available in PT (BSPT, ZG), BSP (G, PF), and NPT formats. Connection is via back mounting. SS304 is standard, with SS316 available upon request for more corrosive environments.
Is this gauge suitable for high-vibration industrial environments?
Yes. The bimetallic temperature gauge features a robust stainless steel case and IP65 protection rating, making it well-suited for high-vibration and harsh industrial applications such as machine building, industrial refrigeration, and water treatment facilities. Its neutral shake-proof packaging also ensures safe delivery.

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