Key Features and Components

• 1. Metallic Stem/Protector: This is the long, rigid tube that is inserted into the process. It's typically made from stainless steel (e.g., SS304 or SS316) for corrosion resistance and strength. It can be plain or equipped with threads (e.g., NPT, BSP) for easy installation into a tank, pipe, or machine.

• 2. Dial Face: The easy-to-read display, usually covered by a glass or plastic crystal. It can be marked in Celsius, Fahrenheit, or both.

• 3. Pointer/Needle: Directly connected to the bimetallic coil, it moves across the dial.

• 4. Case: The housing that holds the dial. It can be made of stainless steel, aluminum, or plastic. Many are designed to be re-rotatable, meaning you can turn the dial to the most readable position after installation.

• 5. Stem Length and Diameter: Available in a huge variety of sizes to suit different applications, from a few inches to several feet long.

Advantages

• Robust and Durable: Can withstand vibration, pressure, and harsh environments.

• No Power Required: It's a purely mechanical device, so it doesn't need batteries or electricity. This makes it simple, reliable, and safe in hazardous areas.

• Easy to Read and Install: Provides an instant, at-a-glance reading. Threaded models install easily into standard fittings.

• Cost-Effective: Generally inexpensive compared to electronic temperature sensors and transmitters.

• Wide Temperature Range: Suitable for a broad range of temperatures, typically from -80°C to over 500°C (-100°F to 1000°F), depending on the model.